Airworthiness Directives; The Boeing Company Airplanes

[Federal Register Volume 90, Number 143 (Tuesday, July 29, 2025)]
[Rules and Regulations]
[Pages 35594-35599]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-14354]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-1722; Project Identifier AD-2025-01176-T; 
Amendment 39-23094; AD 2025-15-07]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2025-01-
08, which applied to all The Boeing Company Model 747-200B, 747-200C, 
747-200F, 747-300, 747-400, 747-400D, 747-400F, 747-8F, and 747-8 
series airplanes. AD 2025-01-08 required identifying the part number, 
and the serial number if applicable, of the Captain's and First 
Officer's seats and applicable on-condition actions for affected seats. 
AD 2025-01-08 also required a one-time detailed inspection and 
repetitive checks of the horizontal movement system (HMS) of the 
Captain's and First Officer's seats and applicable on-condition 
actions. Since the FAA issued AD 2025-01-08, the FAA determined that AD 
2025-01-08 contains an error when providing conditions for taking 
credit using a previous revision of the service information. This AD 
requires the actions of AD 2025-01-08 and revises paragraph (j) of this 
AD to clarify which actions are not required. The FAA is issuing this 
AD to address the unsafe condition on these products.

DATES: This AD is effective August 13, 2025.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of March 19, 
2025 (90 FR 9382, February 12, 2025).
    The FAA must receive comments on this AD by September 12, 2025.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
    <bullet> Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
    <bullet> Fax: 202-493-2251.
    <bullet> Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
    <bullet> Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    AD Docket: You may examine the AD docket at regulations.gov by 
searching for and locating Docket No. FAA-2025-1722; or in person at 
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, 
except Federal holidays. The AD docket contains this final rule, any 
comments received, and other information. The street address for Docket 
Operations is listed above.
    Material Incorporated by Reference:
    <bullet> For Boeing material identified in this AD, contact Boeing 
Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 
2600 Westminster Boulevard, MC 110-SK57, Seal Beach, CA 90740-5600; 
phone 562-797-1717; website myboeingfleet.com.
    <bullet> You may view this material at the FAA, Airworthiness 
Products Section, Operational Safety Branch, 2200 South 216th St., Des 
Moines, WA. For information on the availability of this material at the 
FAA, call 206-231-3195. It is also available at regulations.gov under 
Docket No. FAA-2025-1722.

FOR FURTHER INFORMATION CONTACT: Julie Linn, Aviation Safety Engineer, 
FAA, 2200 South 216th Street, Des Moines, WA 98198; phone 206-231-3584; 
email [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to send any written data, views, or arguments 
about this final rule. Send your comments using a method listed under 
the ADDRESSES section. Include ``Docket No.

[[Page 35595]]

FAA-2025-1722 and Project Identifier AD-2025-01176-T'' at the beginning 
of your comments. The most helpful comments reference a specific 
portion of the final rule, explain the reason for any recommended 
change, and include supporting data. The FAA will consider all comments 
received by the closing date and may amend this final rule because of 
those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this final rule.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this AD contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this AD, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this AD. Submissions containing CBI should be sent to Julie 
Linn, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des 
Moines, WA 98198; phone 206-231-3584; email [email protected]. Any 
commentary that the FAA receives that is not specifically designated as 
CBI will be placed in the public docket for this rulemaking.

Background

    The FAA issued AD 2025-01-08, Amendment 39-22932 (90 FR 9382, 
February 12, 2025) (AD 2025-01-08), for all The Boeing Company Model 
747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 
747-8F, and 747-8 series airplanes. AD 2025-01-08 superseded AD 2019-
22-02, Amendment 39-19781 (84 FR 67854, December 12, 2019), and 
required identifying the part number, and the serial number if 
applicable, of the Captain's and First Officer's seats and applicable 
on-condition actions for affected seats, including inspecting the fore 
and aft and vertical manual control levers for looseness, installing 
serviceable seats, and doing a seat functional test after any cable 
adjustment. AD 2025-01-08 also required a one-time detailed inspection 
and repetitive checks of the HMS of the Captain's and First Officer's 
seats and applicable on-condition actions, including clearing the seat 
tracks of foreign object debris (FOD), overhauling the HMS, and 
replacing the horizontal stabilizer. AD 2025-01-08 was prompted by 
reports of uncommanded fore and aft movement of the Captain's and First 
Officer's seats. The FAA issued AD 2025-01-08 to address uncommanded 
fore and aft movement of the Captain's and First Officer's seats which, 
during a critical part of a flight such as takeoff or landing, could 
cause a flight control obstruction or unintended flight control input, 
which could result in the loss of the ability to control the airplane.

Actions Since AD 2025-01-08 Was Issued

    Since the FAA issued AD 2025-01-08, the FAA determined that 
paragraph (j) of AD 2025-01-08 inadvertently provided credit for the 
actions in both paragraphs (g) and (h) of AD 2025-01-08 for a seat that 
met the criteria in any row in Table 1 to paragraph (j) of AD 2025-01-
08. The FAA intended to provide credit for the actions in paragraph (g) 
of AD 2025-01-08 if the airplane records show that a seat meets the 
conditions pertaining to Boeing Special Attention Service Bulletin 747-
25-3644, Revision 1, dated July 17, 2018; and credit for the actions in 
paragraph (h) of AD 2025-01-08 if the airplane records show that an 
Ipeco Captain's or First Officer's seat meets the conditions pertaining 
to Boeing Special Attention Service Bulletin 747-25-3653, Revision 1, 
dated October 19, 2018.

FAA's Determination

    The FAA is issuing this AD because the agency has determined the 
unsafe condition described previously is likely to exist or develop in 
other products of the same type design.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed Boeing Special Attention Service Bulletin 747-25-
3644, Revision 2, dated January 27, 2023, which the Director of the 
Federal Register approved for incorporation by reference as of March 
19, 2025 (90 FR 9382, February 12, 2025).
    The FAA also reviewed Boeing Special Attention Service Bulletin 
747-25-3653, Revision 2, dated January 27, 2023, which the Director of 
the Federal Register approved for incorporation by reference as of 
March 19, 2025 (90 FR 9382, February 12, 2025).
    This material is reasonably available because the interested 
parties have access to it through their normal course of business or by 
the means identified in the ADDRESSES section.

AD Requirements

    This AD retains all requirements of AD 2025-10-08, except that this 
AD corrects paragraph (j) of AD 2025-01-08. This AD requires 
accomplishing the actions specified in the material already described, 
except for any differences identified as exceptions in the regulatory 
text of this AD.

Justification for Immediate Adoption and Determination of the Effective 
Date

    Section 553(b) of the Administrative Procedure Act (APA) (5 U.S.C. 
551 et seq.) authorizes agencies to dispense with notice and comment 
procedures for rules when the agency, for ``good cause,'' finds that 
those procedures are ``impracticable, unnecessary, or contrary to the 
public interest.'' Under this section, an agency, upon finding good 
cause, may issue a final rule without providing notice and seeking 
comment prior to issuance. Further, section 553(d) of the APA 
authorizes agencies to make rules effective in less than thirty days, 
upon a finding of good cause.
    An unsafe condition exists that requires the immediate adoption of 
this AD without providing an opportunity for public comments prior to 
adoption. The FAA has found that the risk to the flying public 
justifies forgoing notice and comment prior to adoption of this rule 
because of the urgency to correct AD 2025-01-08 to ensure compliance. 
AD 2025-01-08 does not fully address the unsafe condition because it 
allows operators to forego complying with required corrective actions 
and inspections when the Captain's or First Officer's seat has not met 
the necessary conditions. Paragraph (j) of AD 2025-01-08 incorrectly 
provides credit for all actions in the AD when the credit should be 
tied to the service information applicable to the airplane 
configuration. Without limiting the extent of the credit given, the 
unsafe condition still exists. Accordingly, notice and opportunity for 
prior public comment are impracticable and contrary to the public 
interest, pursuant to 5 U.S.C. 553(b).
    In addition, for the foregoing reason(s), the FAA finds that good 
cause exists pursuant to 5 U.S.C. 553(d) for making this amendment 
effective in less than 30 days.

[[Page 35596]]

Regulatory Flexibility Act

    The requirements of the Regulatory Flexibility Act (RFA) do not 
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt 
a rule without prior notice and comment. Because the FAA has determined 
that it has good cause to adopt this rule without notice and comment, 
RFA analysis is not required.

Costs of Compliance

    The FAA estimates that this AD affects 162 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                  Estimated Costs for Required Actions per Seat
----------------------------------------------------------------------------------------------------------------
                                                                                                Cost on U.S.
              Action                     Labor cost       Parts cost    Cost per product          operators
----------------------------------------------------------------------------------------------------------------
Identification, seat (retained      1 work-hour x $85             $0  $85.................  $13,770.
 actions from AD 2025-01-08).        per hour = $85.
Detailed inspection, HMS (retained  1 work-hour x $85              0  $85.................  $13,770.
 actions from AD 2025-01-08).        per hour = $85.
Checks, HMS (retained actions from  2 work-hours x $85             0  $170 per check cycle  $27,540 per check
 AD 2025-01-08).                     per hour = $170 per                                     cycle.
                                     check cycle.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any on-condition 
actions that would be required based on the results of the inspection. 
The FAA has no way of determining the number of aircraft that might 
need these on-condition actions:

                                         On-Condition Actions per Seat *
----------------------------------------------------------------------------------------------------------------
             Action                  Labor cost                Parts cost                 Cost per product
----------------------------------------------------------------------------------------------------------------
Adjustment, control lever cable  1 work-hour x $85   $0...........................  $85.
                                  per hour = $85.
Overhaul, HMS..................  11 work-hours x     Up to $5,824.................  Up to $6,759.
                                  $85 per hour =
                                  $935.
Inspection of each seat's fore/  1 work-hour x $85   $0...........................  $85 per seat.
 aft and vertical manual          per hour = $85
 control levers.                  per seat.
Installation of serviceable      1 work-hour x $85   $0...........................  $85 per seat.
 seats.                           per hour = $85
                                  per seat.
Clearing FOD...................  1 work-hour x $85   $0...........................  $85 per seat.
                                  per hour = $85
                                  per seat.
Replacement of the horizontal    1 work-hour x $85   $7,937 per actuator..........  $8,022 per actuator.
 actuator.                        per hour = $85
                                  per actuator.
Operational test, adjusted       1 work-hour x $85   $0...........................  $85 per seat.
 control lever cable.             per hour = $85
                                  per seat.
----------------------------------------------------------------------------------------------------------------
* The estimated cost for tooling to align an affected seat for adjustment of the control lever cable is up to
  $46,064.

    The FAA has received no definitive data that would enable the FAA 
to provide cost estimates for the optional terminating action for the 
repetitive checks specified in this AD.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs 
describes in more detail the scope of the Agency's authority.
    The FAA is issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: General requirements. 
Under that section, Congress charges the FAA with promoting safe flight 
of civil aircraft in air commerce by prescribing regulations for 
practices, methods, and procedures the Administrator finds necessary 
for safety in air commerce. This regulation is within the scope of that 
authority because it addresses an unsafe condition that is likely to 
exist or develop on products identified in this rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866, and
    (2) Will not affect intrastate aviation in Alaska.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by:
0
a. Removing Airworthiness Directive (AD) 2025-01-08, Amendment 39-22932 
(90 FR 9382, February 12, 2025); and
0
b. Adding the following new AD:

2025-15-07 The Boeing Company: Amendment 39-23094; Docket No. FAA-
2025-1722; Project Identifier AD-2025-01176-T.

(a) Effective Date

    This airworthiness directive (AD) is effective August 13, 2025.

(b) Affected ADs

    This AD replaces AD 2025-01-08, Amendment 39-22932 (90 FR 9382, 
February 12, 2025) (AD 2025-01-08).

(c) Applicability

    This AD applies to all The Boeing Company Model 747-200B, 747-
200C, 747-200F, 747-300, 747-400, 747-400D, 747-

[[Page 35597]]

400F, 747-8F, and 747-8 series airplanes, certificated in any 
category.

(d) Subject

    Air Transport Association (ATA) of America Code 25, Equipment/
furnishings.

(e) Unsafe Condition

    This AD was prompted by reports of uncommanded fore and aft 
movement of the Captain's and First Officer's seats. The FAA is 
issuing this AD to address uncommanded fore and aft movement of the 
Captain's and First Officer's seats. The unsafe condition, if not 
addressed, could result in an uncommanded fore or aft seat movement 
during a critical part of a flight, such as takeoff or landing, and 
could cause a flight control obstruction or unintended flight 
control input, which could result in the loss of the ability to 
control the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Seat Part Number Identification and On-Condition Actions

    Except as specified by paragraphs (i) and (j) of this AD: At the 
applicable times specified in the ``Compliance'' paragraph of Boeing 
Special Attention Service Bulletin 747-25-3644, Revision 2, dated 
January 27, 2023, do an inspection to determine the part number, and 
serial number as applicable, of the Captain's and First Officer's 
seats, and all applicable on-condition actions identified in, and in 
accordance with the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 747-25-3644, Revision 2, dated January 
27, 2023. A review of airplane maintenance records is acceptable in 
lieu of this inspection if the part number and serial number of the 
Captain's and First Officer's seats can be conclusively determined 
from that review.

(h) Detailed Inspection, and Repetitive Checks of Horizontal Movement 
System and On-Condition Actions

    Except as specified by paragraphs (i) and (j) of this AD: At the 
applicable times specified in the ``Compliance'' paragraph of Boeing 
Special Attention Service Bulletin 747-25-3653, Revision 2, dated 
January 27, 2023, do all applicable actions identified as ``RC'' 
(required for compliance) in, and in accordance with, the 
Accomplishment Instructions of Boeing Special Attention Service 
Bulletin 747-25-3653, Revision 2, dated January 27, 2023. Actions 
identified as terminating action in Boeing Special Attention Service 
Bulletin 747-25-3653, Revision 2, dated January 27, 2023, terminate 
the applicable required actions of this AD, provided the terminating 
action is done in accordance with the Accomplishment Instructions of 
Boeing Special Attention Service Bulletin 747-25-3653, Revision 2, 
dated January 27, 2023.

(i) Exceptions to Service Information Specifications

    (1) Where the ``Compliance'' paragraph of Boeing Special 
Attention Service Bulletin 747-25-3653, Revision 2, dated January 
27, 2023, refers to the original issue date of this service 
bulletin, this AD requires using January 16, 2020 (the effective 
date of AD 2019-22-02, Amendment 39-19781 (84 FR 67854, December 12, 
2019) (AD 2019-22-02), which was superseded by AD 2025-01-08).
    (2) Where the ``Compliance'' paragraph of Boeing Special 
Attention Service Bulletin 747-25-3644, Revision 2, dated January 
27, 2023, refers to 72 months after the original issue date of this 
service bulletin, this AD requires using 36 months after January 16, 
2020 (the effective date of AD 2019-22-02).
    (3) Where the ``Compliance'' paragraph of Boeing Special 
Attention Service Bulletin 747-25-3644, Revision 2, dated January 
27, 2023, refers to the Revision 2 date of this service bulletin, 
this AD requires using the March 19, 2025 (the effective date of AD 
2025-01-08).

(j) Acceptable Conditions for Compliance

    If the airplane records show that an Ipeco Captain's or First 
Officer's seat installed on an airplane meets the conditions in any 
of the eleven rows for Boeing Special Attention Service Bulletin 
747-25-3644, Revision 1, dated July 17, 20218, in Table 1 to 
paragraph (j) of this AD, then the actions in paragraph (g) of this 
AD are not required for that seat. If the airplane records show that 
an Ipeco Captain's or First Officer's seat meets the conditions in 
any of the three rows for Boeing Special Attention Service Bulletin 
747-25-3653, Revision 1, dated October 19, 2018, in Table 1 to 
paragraph (j) of this AD, then the actions specified in paragraph 
(h) of this AD are not required for that seat.

                             Table 1 to Paragraph (j)--Alternative Acceptable Seats
----------------------------------------------------------------------------------------------------------------
   Actions done in accordance with         Actions done in
   Boeing Special Attention Service     accordance with Ipeco      Having Ipeco P/N--    And additional required
              Bulletin--                  Service Bulletin--                                   conditions--
----------------------------------------------------------------------------------------------------------------
747-25-3644, Revision 1, dated July    None...................  3A258-0041-01-2 or       No additional
 17, 2018.                                                       3A258-0042-01-2.         conditions required.
747-25-3644, Revision 1, dated July    097-25-02, Issue 1,      3A090-0027-01-1 or       The manual override
 17, 2018.                              dated October 2, 2013;   3A090-0028-01-1.         cable maintenance has
                                        or Issue 2, dated                                 been completed on the
                                        March 28, 2014; or                                seat in accordance
                                        Issue 3, dated March                              with the Ipeco
                                        4, 2020.                                          Component Maintenance
                                                                                          Manual 25-10-94,
                                                                                          Revision 10, dated
                                                                                          September 13, 2019, or
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 15, dated
                                                                                          August 10, 2021.
747-25-3644, Revision 1, dated July    107-25-03, Issue 1,      3A090-0055-01-1 or       The manual override
 17, 2018.                              dated October 2, 2013;   3A090-0056-01-1.         cable maintenance has
                                        or Issue 2, dated                                 been completed on the
                                        March 28, 2014; or                                seat in accordance
                                        Issue 3, dated March                              with the Ipeco
                                        4, 2020.                                          Component Maintenance
                                                                                          Manual 25-10-97,
                                                                                          Revision 14, dated
                                                                                          December 5, 2013, and
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 22, dated
                                                                                          March 19, 2021.
747-25-3644, Revision 1, dated July    112-25-02, Issue 1,      3A090-0065-01-1 or       The manual override
 17, 2018.                              dated November 4,        3A090-0066-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 18, 2020; or                                Component Maintenance
                                        Issue 4, dated May 7,                             Manual 25-11-01,
                                        2021.                                             Revision 9, dated
                                                                                          September 20, 2013,
                                                                                          and subsequent
                                                                                          revisions up to and
                                                                                          including Revision 18,
                                                                                          dated December 19,
                                                                                          2021.
747-25-3644, Revision 1, dated July    209-25-02, Issue 1,      3A090-0075-01-1 or       The manual override
 17, 2018.                              dated November 13,       3A090-0076-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 4, 2020.                                    Component Maintenance
                                                                                          Manual 25-11-32,
                                                                                          Revision 4, dated
                                                                                          September 27, 2013,
                                                                                          and subsequent
                                                                                          revisions up to and
                                                                                          including Revision 9,
                                                                                          dated July 23, 2020.

[[Page 35598]]

 
747-25-3644, Revision 1, dated July    211-25-04, Issue 1,      3A090-0079-01-1 or       The manual override
 17, 2018.                              dated November 4,        3A090-0080-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 4, 2020.                                    Component Maintenance
                                                                                          Manual 25-10-79,
                                                                                          Revision 23, dated
                                                                                          September 5, 2013, and
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 31, dated
                                                                                          July 23, 2020.
747-25-3644, Revision 1, dated July    212-25-03, Issue 1,      3A090-0081-01-1 or       The manual override
 17, 2018.                              dated November 4,        3A090-0082-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 4, 2020.                                    Component Maintenance
                                                                                          Manual 25-10-80,
                                                                                          Revision 9, dated
                                                                                          September 27, 2013,
                                                                                          and subsequent
                                                                                          revisions up to and
                                                                                          including Revision 15,
                                                                                          dated July 23, 2020.
747-25-3644, Revision 1, dated July    258-25-08, Issue 4,      3A258-0041-01-1 or       Does not have a serial
 17, 2018.                              dated April 25, 2014;    3A258-0042-01-1.         number identified by
                                        or Issue 5, dated                                 the effectivity of the
                                        March 4, 2020; or                                 referenced Ipeco
                                        Issue 6, dated January                            Service Bulletins.
                                        28, 2021.
747-25-3644, Revision 1, dated July    258-25-08, Issue 4,      3A258-0041-01-1 or       The manual override
 17, 2018.                              dated April 25, 2014;    3A258-0042-01-1.         cable maintenance has
                                        or Issue 5, dated                                 been completed on the
                                        March 4, 2020; or                                 seat in accordance
                                        Issue 6, dated January                            with the Ipeco
                                        28, 2021.                                         Component Maintenance
                                                                                          Manual 25-11-38,
                                                                                          Revision 21, dated
                                                                                          December 12, 2013, or
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 53, dated
                                                                                          December 4, 2023.
747-25-3644, Revision 1, dated July    258-25-08, Issue 6,      3A258-0041-01-1Z or      Does not have a serial
 17, 2018.                              dated January 28, 2021.  3A258-0042-01-1Z.        number identified by
                                                                                          the effectivity of the
                                                                                          referenced Ipeco
                                                                                          Service Bulletin.
747-25-3644, Revision 1, dated July    258-25-08, Issue 6,      3A258-0041-01-1Z or      The manual override
 17, 2018.                              dated January 28, 2021.  3A258-0042-01-1Z.        cable maintenance has
                                                                                          been completed on the
                                                                                          seat in accordance
                                                                                          with the Ipeco
                                                                                          Component Maintenance
                                                                                          Manual 25-11-38,
                                                                                          Revision 21, dated
                                                                                          December 12, 2013, or
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 53, dated
                                                                                          December 4, 2023.
747-25-3653, Revision 1, dated         None...................  3A258-0041-01-2, 3A258-  No additional
 October 19, 2018.                                               0041-01-1Z, 3A258-0042-  conditions required.
                                                                 01-2 or 3A258-0042-01-
                                                                 1Z.
747-25-3653, Revision 1, dated         258-25-13, Issue 3,      3A258-0041-01-1 or       Has a horizontal
 October 19, 2018.                      dated November 27,       3A258-0042-01-1.         actuator with Artus
                                        2017; or Issue 4,                                 part number AD8650503
                                        dated April 28, 2020,                             at ``Amendment C'' or
                                        or Issue 5; dated                                 later.
                                        November 1, 2021.
747-25-3653, Revision 1, dated         258[dash]25[dash]14,     3A258-0041-01-1 or       Has a horizontal
 October 19, 2018.                      Issue 4, dated January   3A258-0042-01-1.         actuator with Artus
                                        29, 2018; or Issue 5,                             part number AD8650503
                                        dated April 28, 2020.                             at ``Amendment C'' or
                                                                                          later.
----------------------------------------------------------------------------------------------------------------

(k) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, AIR-520, Continued Operational Safety Branch, 
FAA, has the authority to approve AMOCs for this AD, if requested 
using the procedures found in 14 CFR 39.19. In accordance with 14 
CFR 39.19, send your request to your principal inspector or 
responsible Flight Standards Office, as appropriate. If sending 
information directly to the manager of the certification office, 
send it to the attention of the person identified in paragraph (l) 
of this AD. Information may be emailed to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the responsible Flight Standards Office.
    (3) An AMOC that provides an acceptable level of safety may be 
used for any repair, modification, or alteration required by this AD 
if it is approved by The Boeing Company Organization Designation 
Authorization (ODA) that has been authorized by the Manager, AIR-
520, Continued Operational Safety Branch, FAA, to make those 
findings. To be approved, the repair method, modification deviation, 
or alteration deviation must meet the certification basis of the 
airplane, and the approval must specifically refer to this AD.
    (4) Except as required by paragraph (i) of this AD: For material 
that contains steps that are labeled as Required for Compliance 
(RC), the provisions of paragraphs (k)(4)(i) and (ii) of this AD 
apply.
    (i) The steps labeled as RC, including substeps under an RC step 
and any figures identified in an RC step, must be done to comply 
with the AD. If a step or substep is labeled ``RC Exempt,'' then the 
RC requirement is removed from that step or substep. An AMOC is 
required for any deviations to RC steps, including substeps and 
identified figures.
    (ii) Steps not labeled as RC may be deviated from using accepted 
methods in accordance with the operator's maintenance or inspection 
program without obtaining approval of an AMOC, provided the RC 
steps, including substeps and identified figures, can still be done 
as specified, and the airplane can be put back in an airworthy 
condition.

[[Page 35599]]

(l) Related Information

    For more information about this AD, contact Julie Linn, Aviation 
Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; 
phone 206-231-3584; email [email protected].

(m) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the material listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this material as applicable to do the actions 
required by this AD, unless this AD specifies otherwise.
    (3) The following material was approved for IBR on March 19, 
2025 (90 FR 9382, February 12, 2025).
    (i) Boeing Special Attention Service Bulletin 747-25-3644, 
Revision 2, dated January 27, 2023.
    (ii) Boeing Special Attention Service Bulletin 747-25-3653, 
Revision 2, dated January 27, 2023.
    (4) For Boeing material identified in this AD, contact Boeing 
Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 
2600 Westminster Boulevard, MC 110-SK57, Seal Beach, CA 90740-5600; 
phone 562-797-1717; website myboeingfleet.com.
    (5) You may view this material at the FAA, Airworthiness 
Products Section, Operational Safety Branch, 2200 South 216th St., 
Des Moines, WA. For information on the availability of this material 
at the FAA, call 206-231-3195.
    (6) You may view this material at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].

    Issued on July 25, 2025.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft 
Certification Service.
[FR Doc. 2025-14354 Filed 7-28-25; 8:45 am]
BILLING CODE 4910-13-P

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