Airworthiness Directives; Boeing Model 757 Airplanes

[Federal Register Volume 70, Number 174 (Friday, September 9, 2005)]
[Rules and Regulations]
[Pages 53554-53556]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 05-17772]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2004-19540; Directorate Identifier 2004-NM-110-AD; 
Amendment 39-14258; AD 2005-18-18]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 757 Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain

[[Page 53555]]

Boeing Model 757 airplanes. This AD requires inspections of certain 
wire bundles in the left and right engine-to-wing aft fairings for 
discrepancies; installation of back-to-back p-clamps between the wire 
and hydraulic supply tube at the aft end of the right-hand strut only; 
and associated re-routing of the wire bundles, if necessary. This AD 
results from a report indicating that a circuit breaker for the fuel 
shutoff valve tripped due to a wire that chafed against the structure 
in the flammable leakage zone of the aft fairing, causing a short 
circuit. We are issuing this AD to prevent chafing between the wire 
bundle and the structure of the aft fairing, which could result in 
electrical arcing and subsequent ignition of flammable vapors and 
possible uncontrollable fire.

DATES: This AD becomes effective October 14, 2005.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of October 14, 
2005.

ADDRESSES: You may examine the AD docket on the Internet at http://dms.dot.gov or in person at the Docket Management Facility, U.S. 
Department of Transportation, 400 Seventh Street, SW., Nassif Building, 
Room PL-401, Washington, DC.
    Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, 
Washington 98124-2207, for service information identified in this AD.

FOR FURTHER INFORMATION CONTACT: Thomas Thorson, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification 
Office, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone 
(425) 917-6508; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Examining the Docket

    You may examine the AD docket on the Internet at http://dms.dot.gov 
or in person at the Docket Management Facility office between 9 a.m. 
and 5 p.m., Monday through Friday, except Federal holidays. The Docket 
Management Facility office (telephone (800) 647-5227) is located on the 
plaza level of the Nassif Building at the street address stated in the 
ADDRESSES section.

Discussion

    The FAA issued a supplemental notice of proposed rulemaking (NPRM) 
to amend 14 CFR part 39 to include an AD that would apply to certain 
Boeing Model 757 airplanes. That supplemental NPRM was published in the 
Federal Register on July 6, 2005 (70 FR 38823). That supplemental NPRM 
proposed to require inspections of certain wire bundles in the left and 
right engine-to-wing aft fairings for discrepancies; installation of 
back-to-back p-clamps between the wire and hydraulic supply tube at the 
aft end of the right-hand strut only; and associated re-routing of the 
wire bundles, if necessary.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We have considered the comments received. The 
commenters support the supplemental NPRM.

Conclusion

    We have carefully reviewed the available data, including the 
comments received, and determined that air safety and the public 
interest require adopting the AD as proposed in the supplemental NPRM.

Costs of Compliance

    There are about 618 airplanes of the affected design in the 
worldwide fleet. This AD will affect about 342 airplanes of U.S. 
registry. The actions will take between 16 and 44 work hours per 
airplane, depending on airplane configuration, at an average labor rate 
of $65 per work hour. Required parts will cost about $600 per airplane. 
Based on these figures, the estimated cost of this AD on U.S. operators 
is between $560,880 and $1,183,320, or between $1,640 and $3,460 per 
airplane.

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.
    We are 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

    We have determined that 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;
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979); and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket. See the ADDRESSES 
section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

0
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 Federal Aviation Administration (FAA) amends Sec.  39.13 by 
adding the following new airworthiness directive (AD):

2005-18-18 Boeing: Amendment 39-14258. Docket No. FAA-2004-19540; 
Directorate Identifier 2004-NM-110-AD.

Effective Date

    (a) This AD becomes effective October 14, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Model 757-200, -200PF, -200CB, and -300 
series airplanes; certificated in any category; equipped with Rolls-
Royce engines; as identified in Boeing Alert Service Bulletins 757-
28A0073 and 757-28A0074, both Revision 1, both dated February 24, 
2005.

Unsafe Condition

    (d) This AD was prompted by a report indicating that a circuit 
breaker for the fuel shutoff valve tripped due to a wire that

[[Page 53556]]

chafed against the structure in the flammable leakage zone of the 
aft fairing, causing a short circuit. The FAA is issuing this AD to 
prevent chafing between the wire bundle and the structure of the aft 
fairing, which could result in electrical arcing and subsequent 
ignition of flammable vapors and possible uncontrollable fire.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

One-Time Inspections/Related Investigative and Corrective Actions

    (f) Within 60 months after the effective date of this AD, do the 
actions required by paragraphs (f)(1) and (f)(2) of this AD.
    (1) Accomplish the detailed inspections for discrepancies of the 
wire bundles in the left and right engine-to-wing aft fairings, and 
applicable and related investigative and corrective actions if 
necessary, as applicable, by doing all the actions specified in the 
Accomplishment Instructions of the applicable service bulletins 
listed in Table 1 of this AD. Accomplish any related investigative 
and corrective actions before further flight in accordance with the 
applicable service bulletin.

                                 Table 1.--Airplane Models and Service Bulletins
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                                   Boeing Alert Service
         Boeing airplanes                 Bulletin          Revision level                    Date
----------------------------------------------------------------------------------------------------------------
Model 757-200, -200CB, 200PF       757-28A0073.........  Original............  November 20, 2003.
 series airplanes.
Model 757-200, -200CB, 200PF       757-28A0073.........  1...................  February 24, 2005.
 series airplanes.
Model 757-300 series airplanes...  757-28A0074.........  Original............  November 20, 2003.
Model 757-300 series airplanes...  757-28A0074.........  1...................  February 24, 2005.
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    (2) Install back-to-back p-clamps between the wire and hydraulic 
supply tube at the aft end of the right-hand strut only; and re-
route the wire bundles, if necessary, by doing all the applicable 
actions specified in the Accomplishment Instructions of Boeing Alert 
Service Bulletin 757-28A0073 or 757-28A0074, both Revision 1, both 
dated February 24, 2005; as applicable.

    Note 1: For the purposes of this AD, a detailed inspection is: 
``An intensive examination of a specific item, installation, or 
assembly to detect damage, failure, or irregularity. Available 
lighting is normally supplemented with a direct source of good 
lighting at an intensity deemed appropriate. Inspection aids such as 
mirror, magnifying lenses, etc., may be necessary. Surface cleaning 
and elaborate procedures may be required.''

Alternative Methods of Compliance (AMOCs)

    (g) The Manager, Seattle Aircraft Certification Office, FAA, has 
the authority to approve AMOCs for this AD, if requested in 
accordance with the procedures found in 14 CFR 39.19.

Material Incorporated by Reference

    (h) You must use the applicable service bulletin listed in Table 
2 of this AD to perform the actions that are required by this AD, 
unless the AD specifies otherwise. The Director of the Federal 
Register approved the incorporation by reference of these documents 
in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing 
Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207, 
for a copy of this service information. You may review copies at the 
Docket Management Facility, U.S. Department of Transportation, 400 
Seventh Street, SW., room PL-401, Nassif Building, Washington, DC; 
on the Internet at http://dms.dot.gov; or at the National Archives 
and Records Administration (NARA). For information on the 
availability of this material at the NARA, call (202) 741-6030, or 
go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

                                  Table 2.--Material Incorporated by Reference
----------------------------------------------------------------------------------------------------------------
      Boeing Alert Service Bulletin               Revision level                          Date
----------------------------------------------------------------------------------------------------------------
757-28A0073..............................  Original...................  November 20, 2003.
757-28A0073..............................  1..........................  February 24, 2005.
757-28A0074..............................  Original...................  November 20, 2003.
757-28A0074..............................  1..........................  February 24, 2005.
----------------------------------------------------------------------------------------------------------------


    Issued in Renton, Washington, on August 31, 2005.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-17772 Filed 9-8-05; 8:45 am]
BILLING CODE 4910-13-P

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