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2023-02-02 GULFSTREAM AEROSPACE CORPORATION: Amendment 39-22309; Docket No. FAA-2022-1305; Project Identifier AD-2022-00913-T.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective February 28, 2023.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Gulfstream Aerospace Corporation Model GV and GV-SP
    airplanes, all serial numbers, certificated in any category.

Note 1 to paragraph (c): Model GV-SP airplanes are also referred to by the
marketing designations G500, G550, and G500-5000.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 3200, Landing Gear System.

(e) UNSAFE CONDITION

    This AD was prompted by the omission of a life limit in the airworthi-
    ness limitations section (ALS) for  a certain main landing gear  (MLG)
    trunnion pin. The FAA is issuing this AD to prevent a MLG trunnion pin
    from  remaining  in  service  beyond  its  life  limit.  This   unsafe
    condition, if  not addressed,  could result  in MLG  failure and could
    lead to a runway excursion.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) INCORPORATION OF ALS REVISIONS

    Within  12 months  after the  effective date  of this  AD, revise  the
    existing  ALS  of  the  instructions  for  continued  airworthiness or
    aircraft inspection program for  your airplane by establishing  a life
    limit of 20,000  flight cycles for  each MLG trunnion  pin part number
    (P/N) 1159SCL566-17.

Note 2 to paragraph (g): The life limit in paragraph (g) of this AD is con
-tained in table 5 in Section 05-10-10  of the Gulfstream V Aircraft Main-
tenance Manual, Revision 55, dated March 15, 2022;  table 4 in Section 05-
10-10 of the Gulfstream G500-5000 Aircraft Maintenance Manual, Revision 36
dated March 15, 2022;  and  table 4  in Section 05-10-10 of the Gulfstream
G550 Aircraft Maintenance Manual, Revision 36, dated March 15, 2022.

(h) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager,  Atlanta ACO 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 appro-
    priate. If sending information directly to the manager of the certifi-
    cation office,  send it to the attention  of the person  identified in
    paragraph (i)(1) of this AD.

(2) Before using any approved AMOC,  notify your appropriate principal in-
    spector, or lacking a principal inspector,  the manager of the respon-
    sible Flight Standards Office.

(i) RELATED INFORMATION

(1) For more information about this AD, contact Miral Patel, Aerospace En-
    gineer, Systems and Equipment Section,  FAA,  Atlanta ACO Branch, 1701
    Columbia Avenue, College Park, GA 30337;  phone: 404-474-5590;  email:
    9-ASO-ATLACO-ADs@faa.gov.

(2) For service information identified in this AD that is not incorporated
    by reference, contact Gulfstream Aerospace Corporation, Technical Pub-
    lications Dept., P.O. Box 2206, Savannah, GA 31402-2206;  phone: (800)
    810-4853;   email:  pubs@gulfstream.com;  website:  gulfstream.com/en/
    customer-support/.  You may view this service information  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.

(j) MATERIAL INCORPORATED BY REFERENCE

    None.

Issued on January 18, 2023.  Christina Underwood, Acting Director, Compli-
ance & Airworthiness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT:  Miral Patel, Aerospace Engineer, Systems
and Equipment Section,  FAA,  Atlanta  ACO  Branch,  1701 Columbia Avenue,
College Park, GA 30337;  phone: 404-474-5590; email: 9-ASO-ATLACO-ADs@faa.
gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-1305; Project Identifier AD-2022-00913-T;
Amendment 39-22309; AD 2023-02-02]
RIN 2120-AA64

Airworthiness Directives; Gulfstream Aerospace Corporation
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
Gulfstream Aerospace Corporation (Gulfstream) Model GV and GV-SP
airplanes. This AD was prompted by the omission of a life limit in the
airworthiness limitations section (ALS) of the maintenance manual for a
certain main landing gear (MLG) trunnion pin. This AD requires revising
the ALS of the existing instructions for continued airworthiness (ICA)
or inspection program for the airplane to establish a life limit for
the affected MLG trunnion pin. The FAA is issuing this AD to address
the unsafe condition on these products.

DATES: This AD is effective February 28, 2023.

ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2022-1305; 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 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.

FOR FURTHER INFORMATION CONTACT: Miral Patel, Aerospace Engineer,
Systems and Equipment Section, FAA, Atlanta ACO Branch, 1701 Columbia
Avenue, College Park, GA 30337; phone: 404-474-5590; email: 9-ASO-
ATLACO-ADs@faa.gov.

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 Model GV
and GV-SP airplanes. The NPRM published in the Federal Register on
October 27, 2022 (87 FR 65018). The NPRM was prompted by a report
indicating a life limit for replacing MLG trunnion pin part number (P/
N) 1159SCL566-17 had been omitted from the ALS of the maintenance
manual for Model GV and GV-SP airplanes. Gulfstream revised the ALS for
the applicable airplanes to establish a life limit of 20,000 flight
cycles for the affected MLG trunnion pin. A trunnion pin remaining in
service beyond its life limit could lead to fracture and failure of the
trunnion pin. This condition, if not addressed, could result in MLG
failure and could lead to a runway excursion.

Discussion of Final Airworthiness Directive

Comments

The FAA received no comments on the NPRM or on the determination of
the cost to the public.

Conclusion

The FAA reviewed the relevant data 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.

Other Related Service Information

The FAA reviewed Gulfstream GV Aircraft Maintenance Manual,
Revision 55, dated March 15, 2022; Gulfstream G550 Aircraft Maintenance
Manual, Revision 36, dated March 15, 2022; and Gulfstream G500-5000
Aircraft Maintenance Manual, Revision 36, dated March 15, 2022. The
service information adds a life limit for MLG trunnion pin P/N
1159SCL566-17.

Costs of Compliance

The FAA estimates that this AD affects 582 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:

Estimated Costs

Action
Labor cost
Parts cost
Cost/airplane
Cost on U.S. operators
Revise ALS 1 work-hour x $85 = $85
N/A
$85
$49,470

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

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]

2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive: