DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-1305; Project Identifier AD-2022-00913-T]
RIN 2120-AA64

Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all Gulfstream Aerospace Corporation (Gulfstream) Model GV and GV-
SP airplanes. This proposed 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 proposing
this AD to address the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by December
12, 2022.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to regulations.gov. Follow
the instructions for submitting comments.
Fax: 202-493-2251.
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.
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 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 NPRM, any comments received, and other
information. The street address for Docket Operations is listed above.

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:

Comments Invited

The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under ADDRESSES. Include ``Docket No. FAA-2022-1305; Project Identifier
AD-2022-00913-T'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, 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 proposal 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 NPRM.

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 NPRM 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 NPRM, 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 NPRM. Submissions containing CBI should be sent to 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. 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 has received 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 Models 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
unaddressed, could result in MLG failure and could lead to a runway
excursion.

FAA's Determination

The FAA is issuing this NPRM after determining that the unsafe
condition described previously is likely to exist or develop on other
products of the same type design.

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.

Proposed AD Requirements in This NPRM

This proposed AD would require revising the ALS of the existing ICA
or inspection program for the airplane to establish a life limit of
20,000 flight cycles for MLG trunnion pin P/N 1159SCL566-17.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 582 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:

Estimated Costs

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

The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would 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 this proposed
regulation:

(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Would not affect intrastate aviation in Alaska, and
(3) Would 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 Proposed Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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: