DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0887; Project Identifier MCAI-2022-00051-T]
Airworthiness Directives; Gulfstream Aerospace LP (Type
Certificate Previously Held by Israel Aircraft Industries, Ltd.)
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
SUMMARY: The FAA proposes to adopt a new airworthiness directive
for certain Gulfstream Aerospace LP Model Gulfstream G150 airplanes.
This proposed AD was prompted by reports that wing flap fairing
debonding and corrosion were discovered at certain areas of the lower
skin on both wings. This proposed AD requires an inspection for
corrosion in certain areas of the wing skin fairings, additional
inspections if necessary, resealing the fairings with new fillet seal,
and applicable corrective actions, as specified in the Civil Aviation
Authority of Israel (CAAI) AD, which is proposed for incorporation by
reference. 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 September
ADDRESSES: You may send comments, using the procedures found in
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow
instructions for submitting comments.
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.
For service information identified in this NPRM, contact Gulfstream
Aerospace Corporation, P.O. Box 2206, Mail Station D-25, Savannah, GA
31402-2206; telephone 800-810-4853; fax 912-965-3520; email
email@example.com; internet https://www.gulfstream.com/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,
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0887; 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: Dan Rodina, Aerospace Engineer,
Aircraft Section, International Validation Branch, FAA, 2200 South
216th Street, Des Moines, WA 98198; telephone and fax 206-231-3225;
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-2022-0887; Project Identifier
MCAI-2022-00051-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
the 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
https://www.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 Dan
Rodina, Aerospace Engineer, Large Aircraft Section, International
Validation Branch, FAA, 2200 South 216th Street, Des Moines, WA 98198;
telephone and fax 206-231-3225; email firstname.lastname@example.org. Any
commentary that the FAA receives which is not specifically designated
as CBI will be placed in the public docket for this rulemaking.
The CAAI, which is the aviation authority for Israel, has issued AD
ISR I-57-2021-12-3, dated January 1, 2022 (CAAI AD ISR I-57-2021-12-3)
(also referred to after this as the Mandatory Continuing Airworthiness
Information, or the MCAI), to correct an unsafe condition for certain
Gulfstream Aerospace LP Model Gulfstream G150 airplanes.
This proposed AD was prompted by reports that wing flap fairing
debonding and corrosion were discovered at the lower skin of rib 3 and
rib 11 on both wings. The FAA is proposing this AD to address flap
fairing debonding and moisture intrusion that might lead to lower wing
skin corrosion and cracking on both wings, and reduced structural
integrity of the wings. See the MCAI for additional background
Related Service Information Under 1 CFR Part 51
CAAI AD ISR I-57-2021-12-3, dated January 1, 2022, describes
procedures for an inspection for corrosion in the area of the wing skin
(or doubler if installed) under the rib 3 and rib 11 fairings, a
penetration or eddy current inspection for cracks if corrosion was
found, a measurement of the thickness of remaining wing skin (or
doubler) if no cracks were found, resealing of rib 3 and rib 11
fairings with new fillet seal, and applicable corrective actions.
Corrective actions include cleaning and removing corrosion, crack
repair, and repair of fairing installation locations with a certain
thickness reduction. This service information 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.
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to the FAA's bilateral agreement with the State of Design Authority,
the FAA has been notified of the unsafe condition described in the MCAI
and service information referenced above. The FAA is proposing this AD
because the FAA evaluated all the relevant information and determined
the unsafe condition described previously is likely to exist or develop
on other products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD requires accomplishing the actions specified in
CAAI AD ISR I-57-2021-12-3 described previously, except for any
differences identified as exceptions in the regulatory text of this
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 87 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
|29 work-hours x $85 per hour
The FAA estimates the following costs
to do any necessary on-
condition action that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need these on-condition actions:
Estimated Costs of On-Condition Actions *
|Up to 10 work-hours x $85 per
hour = $850
Up to $850
* The FAA has received no definitive
data on which to base the cost
estimates for the on-condition repairs specified in this proposed 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.
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
(1) Is not a ``significant regulatory action'' under Executive
(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
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