Airworthiness Directives; Gulfstream Aerospace LP (Type Certificate Previously Held by Israel Aircraft Industries, Ltd.) Airplanes

[Federal Register Volume 90, Number 237 (Friday, December 12, 2025)]
[Rules and Regulations]
[Pages 57683-57685]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-22628]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-2260; Project Identifier MCAI-2025-00043-T; 
Amendment 39-23207; AD 2025-24-10]
RIN 2120-AA64


Airworthiness Directives; Gulfstream Aerospace LP (Type 
Certificate Previously Held by Israel Aircraft Industries, Ltd.) 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all 
Gulfstream Aerospace LP Model Gulfstream 100, Astra SPX, and 1125 
Westwind Astra airplanes. This AD was prompted by a determination that 
new airworthiness limitations are necessary. This AD requires revising 
the existing maintenance or inspection program, as applicable, to 
incorporate new airworthiness limitations. The FAA is issuing this AD 
to address the unsafe condition on these products.

DATES: This AD is effective January 16, 2026.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of January 16, 
2026.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2025-2260; 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, the mandatory continuing airworthiness 
information (MCAI), any comments received, and other information. The 
address for Docket Operations is U.S. Department of Transportation, 
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 
New Jersey Avenue SE, Washington, DC 20590.
    Material Incorporated by Reference:
    <bullet> For Civil Aviation Authority of Israel (CAAI) material 
identified in this AD, contact CAAI, P.O. Box 1101, Golan Street, 
Airport City, 70100, Israel; telephone 972-3-9774665; email 
[email protected]. You may find this material on the CAAI website at 
www.gov.il/en/pages/israeli-airworthiness-directives.
    <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-2025-2260.

FOR FURTHER INFORMATION CONTACT: Trevor Carlton, Aviation Safety 
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
phone: 404-474-5597; email: [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to all Gulfstream 
Aerospace LP Model Gulfstream 100, Astra SPX, and 1125 Westwind Astra 
airplanes. The NPRM was published in the Federal Register on August 21, 
2025 (90 FR 40784). The NPRM was prompted by CAAI AD I-32-25-01-7, 
dated January 13, 2025 (CAAI AD ISR I-32-25-01-7) (also referred to as 
the MCAI), issued by CAAI, which is the aviation authority for Israel. 
The MCAI states an in-service failure of the nose landing gear (NLG) 
actuator-to-strut attachment pin was reported. The FAA has determined 
that new airworthiness limitations are necessary for NLG actuator-to-
strut attachment pins, part numbers (P/Ns) 2247.0500.007 and 
2247.0500.008.
    In the NPRM, the FAA proposed to require revising the existing 
maintenance or inspection program, as applicable, to incorporate new 
airworthiness limitations, as specified in CAAI AD ISR I-32-25-01-7. 
The FAA is issuing this AD to prevent failure of the NLG actuator-to-
strut attachment pin. The unsafe condition, if not addressed, could 
result in failure of the NLG to retract and lock after takeoff or 
extend and lock before landing.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2025-2260.

Discussion of Final Airworthiness Directive

Comments

    The FAA received a comment from an individual who supported the 
NPRM without change.

Conclusion

    These products have been approved by the civil aviation authority 
of another country and are approved for operation in the United States. 
Pursuant to the FAA's bilateral agreement with this State of Design 
Authority, that authority has notified the FAA of the unsafe condition 
described in the MCAI referenced above. The FAA reviewed the relevant 
data, considered any comments received, and determined that air safety 
requires adopting this AD as proposed. Accordingly, the FAA is issuing 
this AD to address the unsafe condition on these products. Except for 
minor editorial changes, this AD is adopted as proposed in the NPRM. 
None of the changes will increase the economic burden on any operator.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed CAAI AD ISR I-32-25-01-7, which specifies new 
airworthiness limitations for safe life limits of the NLG actuator-to-
strut attachment pins, P/Ns 2247.0500.007 and 2247.0500.008. 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.

Costs of Compliance

    The FAA estimates that this AD affects 86 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:
    The FAA has determined that revising the existing maintenance or 
inspection program takes an average of 90 work-hours per operator, 
although the agency recognizes that this number may vary from operator 
to operator. Since operators incorporate maintenance or inspection 
program changes for their affected fleet(s), the FAA has determined 
that a per-operator estimate is more accurate than a per-airplane 
estimate. Therefore, the agency estimates the average total cost per 
operator to be $7,650 (90 work-hours x $85 per work-hour).

[[Page 57684]]

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,
    (2) Will not affect intrastate aviation in Alaska, 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.

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 adding the following new airworthiness 
directive:

2025-24-10 Gulfstream Aerospace LP (Type Certificate Previously Held 
by Israel Aircraft Industries, Ltd.): Amendment 39-23207; Docket No. 
FAA-2025-2260; Project Identifier MCAI-2025-00043-T.

(a) Effective Date

    This airworthiness directive (AD) is effective January 16, 2026.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Gulfstream Aerospace LP Model Gulfstream 
100, Astra SPX, and 1125 Westwind Astra airplanes, certificated in 
any category.

(d) Subject

    Air Transport Association (ATA) of America Code 32, Landing 
gear.

(e) Unsafe Condition

    This AD was prompted by a determination that new airworthiness 
limitations are necessary. The FAA is issuing this AD to prevent 
failure of the nose landing gear (NLG) actuator-to-strut attachment 
pin. The unsafe condition, if not addressed, could result in failure 
of the NLG to retract and lock after takeoff or extend and lock 
before landing.

(f) Compliance

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

(g) Requirements

    Except as specified in paragraph (h) of this AD: Comply with all 
required actions and compliance times specified in, and in 
accordance with, CAAI AD ISR I-32-25-01-7, dated January 13, 2025 
(CAAI AD ISR I-32-25-01-7).

(h) Exceptions to CAAI AD ISR I-32-25-01-7

    (1) Where CAAI AD ISR I-32-25-01-7 refers to its effective date, 
this AD requires using the effective date of this AD.
    (2) The initial compliance time for doing the tasks specified in 
the Action paragraph of CAAI AD ISR I-32-25-01-7 is at the 
applicable discard interval specified in the material referenced in 
the Action paragraph of CAAI AD ISR I-32-25-01-7, or within 3 months 
after the effective date of this AD, whichever occurs later.
    (3) Where the Action paragraph of CAAI AD ISR I-32-25-01-7 
specifies ``to incorporate AMM Revision 26'', this AD requires 
replacing that text with ``revise the existing maintenance or 
inspection program, as applicable, by incorporating the information 
in the Nose Landing Gear Actuator Attachment Pin--Life Limit (Scrap) 
tasks for SHL part numbers 2247.0500.007 and 2247.0500.008''.
    (4) Where the Action paragraph of CAAI AD ISR I-32-25-01-7 
specifies ``to incorporate AMM Revision 32'', this AD requires 
replacing that text with ``revise the existing maintenance or 
inspection program, as applicable, by incorporating the information 
in the NLG Actuator Attachment Pin--Life Limit (Scrap) tasks for SHL 
part numbers 2247.0500.007 and 2247.0500.008''.

(i) Provisions for Alternative Actions and Intervals

    After the existing maintenance or inspection program has been 
revised as required by paragraph (g) of this AD, no alternative 
actions (e.g., inspections) and intervals are allowed unless they 
are approved as specified in the provisions of paragraph (j)(1) of 
this AD.

(j) Additional AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Validation 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 
International Validation Branch, send it to the attention of the 
person identified in paragraph (k) of this AD and email to: 
[email protected]. Before using any approved AMOC, notify your 
appropriate principal inspector, or lacking a principal inspector, 
the manager of the responsible Flight Standards Office.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, International 
Validation Branch, FAA; or CAAI; or CAAI's authorized Designee. If 
approved by the CAAI Designee, the approval must include the 
Designee's authorized signature.

(k) Additional Information

    (1) For more information about this AD, contact Trevor Carlton, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; phone: 404-474-5597; email: 
[email protected].

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference 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.
    (i) Civil Aviation Authority of Israel (CAAI) AD ISR I-32-25-01-
7, dated January 13, 2025.
    (ii) [Reserved]
    (3) For CAAI material identified in this AD, contact CAAI, P.O. 
Box 1101, Golan Street, Airport City, 70100, Israel; telephone 972-
3-9774665; fax 972-3-9774592; email [email protected]. You may find 
this material on the CAAI website at gov.il/en/pages/israeli-
airworthiness-directives.
    (4) 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.

[[Page 57685]]

    (5) 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 December 4, 2025.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2025-22628 Filed 12-11-25; 8:45 am]
BILLING CODE 4910-13-P

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