DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0334; Product Identifier 2020-NM-014-AD; Amendment
39-21165; AD 2020-15-02]
RIN 2120-AA64

Airworthiness Directives; Gulfstream Aerospace LP 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 Gulfstream Aerospace LP Model Gulfstream G280 airplanes. This
AD was prompted by a report of inadequate clearance between the fuel
probes and forward fuel tank structure. This AD requires measuring the
clearance between certain fuel probes and the forward fuel tank
structure, and reinstalling the probes if necessary, as specified in a
Civil Aviation Authority of Israel (CAAI) AD, which is incorporated by
reference. The FAA is issuing this AD to address the unsafe condition
on these products.

DATES: This AD is effective August 27, 2020.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of August 27,
2020.

ADDRESSES: For the material incorporated by reference (IBR) in this AD,
contact the CAAI, P.O. Box 1101, Golan Street, Airport City, 70100,
Israel; telephone 972-3-9774665; fax 972-3-9774592; email
aip@mot.gov.il. You may find this IBR material on the CAA website at
www.caa.gov.il. You may view this IBR 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 in the AD
docket on the internet at https://www.regulations.gov by searching for
and locating Docket No. FAA-2020-0334.

Examining the AD Docket

You may examine the AD docket on the internet at https://www.regulations.
gov by searching for and locating Docket No. FAA-2020-
0334; 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: Tom Rodriguez, Aerospace Engineer,
Large Aircraft Section, International Validation Branch, FAA, 2200
South 216th St., Des Moines, WA 98198; telephone and fax 206-231-3226;
email tom.rodriguez@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

The CAAI, which is the aviation authority for Israel, has issued
Israeli AD ISR-I-53-19-10-5, dated October 10, 2019 (``Israeli AD ISR-
I-53-19-10-5'') (also referred to as the Mandatory Continuing
Airworthiness Information, or ``the MCAI''), to correct an unsafe
condition for certain Gulfstream Aerospace LP Model Gulfstream G280
airplanes.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain Gulfstream
Aerospace LP Model Gulfstream G280 airplanes. The NPRM published in the
Federal Register on April 27, 2020 (85 FR 23259). The NPRM was prompted
by a report of inadequate clearance between the fuel probes and forward
fuel tank structure. The NPRM proposed to require measuring the
clearance between certain fuel probes and the forward fuel tank
structure, and reinstalling the probes if necessary, as specified in a
CAAI AD.
The FAA is issuing this AD to address inadequate clearance between
the fuel probes and forward fuel tank structure, which could result in
a potential source of ignition in a fuel tank, possible fire, and
consequent reduced structural integrity of the airplane. See the MCAI
for additional background information.

Comments

The FAA gave the public the opportunity to participate in
developing this final rule. 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
and the public interest require adopting this final rule as proposed,
except for minor editorial changes. The FAA has determined that these
minor changes:
Are consistent with the intent that was proposed in the
NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.

Related IBR Material Under 1 CFR Part 51

Israeli AD ISR-I-53-19-10-5 describes procedures for checking the
clearance between forward fuel probe No. 1 and aft fuel probe No. 3 and
the forward fuel tank structure, by measuring each fuel probe's
distance to the adjacent skin, and adjusting the clearance, including
reinstallation of the fuel probes at the correct distance if necessary.
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 80 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:

Estimated Costs for Required Actions

According to the manufacturer, some or all of the costs of this AD
may be covered under warranty, thereby reducing the cost impact on
affected individuals. The FAA does not control warranty coverage for
affected individuals. As a result, the FAA has included all known costs
in the cost estimate.

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.

Adoption of 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 (AD):