Proposed Rule2021-23013
Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
October 26, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) 2020-12-06, which applies to all Gulfstream Aerospace Corporation (Gulfstream) Model G-IV airplanes. AD 2020-12-06 requires replacing the nose wheel steering servo valve manifold, incorporating revised operating procedures into the airplane flight manual (AFM), doing a records inspection for any incidents of un-commanded nose wheel steering turns, and reporting the results to the FAA. Since the FAA issued AD 2020-12-06, the FAA determined that a typographical error was made in a citing one of the AFM documents. This proposed AD would retain the actions of AD 2020-12-06 and would correct the citation to the AFM. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 204 (Tuesday, October 26, 2021)</title>
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[Federal Register Volume 86, Number 204 (Tuesday, October 26, 2021)]
[Proposed Rules]
[Pages 59062-59065]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-23013]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0881; Project Identifier AD-2020-01062-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 supersede Airworthiness Directive (AD)
2020-12-06, which applies to all Gulfstream Aerospace Corporation
(Gulfstream) Model G-IV airplanes. AD 2020-12-06 requires replacing the
nose wheel steering servo valve manifold, incorporating revised
operating procedures into the airplane flight manual (AFM), doing a
records inspection for any incidents of un-commanded nose wheel
steering turns, and reporting the results to the FAA. Since the FAA
issued AD 2020-12-06, the FAA determined that a typographical error was
made in a citing one of the AFM documents. This proposed AD would
retain the actions of AD 2020-12-06 and would correct the citation to
the AFM. 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
10, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> 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.
<bullet> 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, Savannah, GA 31402; phone: (800)
810-4853; email: <a href="/cdn-cgi/l/email-protection#13636671605374667f7560676176727e3d707c7e"><span class="__cf_email__" data-cfemail="c2b2b7a0b182a5b7aea4b1b6b0a7a3afeca1adaf">[email protected]</span></a>; website: <a href="https://www.gulfstream.com/en/customer-support/">https://www.gulfstream.com/en/customer-support/</a>. You may view this service
information at the FAA, Airworthiness Products Section,
[[Page 59063]]
Operational Safety Branch, FAA, 901 Locust, Kansas City, MO 64106. For
information on the availability of this material at the FAA, call (816)
329-4148.
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2021-0881; 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: Samuel Belete, Aviation Safety
Engineer, Systems and Equipment Section, FAA, Atlanta ACO Branch, 1701
Columbia Avenue, College Park, GA 30337; phone: (404) 474-5580; fax:
(404) 474-5606; email: <a href="/cdn-cgi/l/email-protection#1f6c7e726a7a73317d7a737a6b7a5f797e7e31787069"><span class="__cf_email__" data-cfemail="dfacbeb2aabab3f1bdbab3baabba9fb9bebef1b8b0a9">[email protected]</span></a>.
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-2021-0881; Project Identifier
AD-2020-01062-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
<a href="https://www.regulations.gov">https://www.regulations.gov</a>, including any personal information you
provide. The agency will also post a report summarizing each
substantive verbal contact received about this proposed AD.
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
Samuel Belete, Aviation Safety Engineer, Systems and Equipment Section,
FAA, Atlanta ACO Branch, 1701 Columbia Avenue, College Park, GA 30337.
Any commentary that the FAA receives which is not specifically
designated as CBI will be placed in the public docket for this
rulemaking.
Background
The FAA issued AD 2020-12-06, Amendment 39-21141 (85 FR 36143, June
15, 2020) (AD 2020-12-06), for all Gulfstream Model G-IV airplanes. AD
2020-12-06 was prompted by reports of un-commanded nose wheel steering
turns. AD 2020-12-06 requires replacing the nose wheel steering servo
valve manifold, incorporating revised operating procedures into the
AFM, doing a records inspection for any incidents of un-commanded nose
wheel steering turns, and reporting the results to the FAA. The agency
issued AD 2020-12-06 to prevent moisture from entering the nose
steering wheel servo valve, which could freeze and cause an un-
commanded nose wheel steering position during touchdown.
Actions Since AD 2020-12-06 Was Issued
Since the FAA issued AD 2020-12-06, a typographical error was found
in the title of the AFM required by paragraph (g)(3) of AD 2020-12-06.
The paragraph incorrectly references the document number as ``FAC-AC-
G400-OPS-0001'' instead of ``GAC-AC-G400-OPS-0001.''
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 Under 1 CFR Part 51
This proposed AD would require Gulfstream IV Customer Bulletin
Number 244, dated March 12, 2018; Gulfstream G300 Customer Bulletin
244, dated March 12, 2018; Gulfstream G400 Customer Bulletin 244, dated
March 12, 2018; Gulfstream IV Airplane Flight Manual, Gulfstream
Aerospace Document Number GAC-AC-GIV-OPS-0001, Revision 52, dated
October 30, 2017; Gulfstream G300 Airplane Flight Manual, Gulfstream
Aerospace Document Number GAC-AC-G300-OPS-0001, Revision 20, dated
October 30, 2017; and Gulfstream G400 Airplane Flight Manual,
Gulfstream Aerospace Document Number GAC-AC-G400-OPS-0001, Revision 20,
dated October 30, 2017; which the Director of the Federal Register
approved for incorporation by reference as of July 20, 2020 (85 FR
36143, June 15, 2020).
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 ADDRESSES.
Proposed AD Requirements in This NPRM
This proposed AD would retain most of the requirements of AD 2020-
12-06. This proposed AD would require revising the AFM (with the
correct title of the AFM document for G400 airplanes) and replacing the
nose wheel steering servo valve manifold. This proposed AD would also
require doing a records inspection for any incidents of un-commanded
nose wheel steering turns and reporting all recorded occurrences of un-
commanded nose wheel steering turns to the FAA.
Differences Between This Proposed AD and the Service Information
The Gulfstream customer bulletins require reporting compliance with
the bulletins to Gulfstream. This proposed AD does not contain that
requirement; however, this proposed AD would require reporting any
known occurrences of un-commanded nose wheel steering turns to the FAA.
The Gulfstream customer bulletins include a compliance time of 48
months beginning on March 12, 2018. The compliance time for this
proposed AD is 36 months after July 20, 2020 (the effective date of AD
2020-12-06).
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 425 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:
[[Page 59064]]
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Incorporate AFM revision.............. 1 work-hour x $85 per $0 $85 $36,125
hour = $85.
Replace nose wheel steering servo 7 work-hours x $85 per 63,624 64,219 27,293,075
valve. hour = $595.
Review records........................ 1 work-hour x $85 per 0 85 36,125
hour = $85.
Report results........................ 1 work hour x $85 per 0 85 36,125
hour = $85.
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some of the costs of this
proposed AD may be covered under warranty, thereby reducing the cost
impact on affected operators.
Paperwork Reduction Act
A federal agency may not conduct or sponsor, and a person is not
required to respond to, nor shall a person be subject to a penalty for
failure to comply with a collection of information subject to the
requirements of the Paperwork Reduction Act unless that collection of
information displays a currently valid OMB Control Number. The OMB
Control Number for this information collection is 2120-0056. Public
reporting for this collection of information is estimated to be
approximately 1 hour per response, including the time for reviewing
instructions, searching existing data sources, gathering and
maintaining the data needed, and completing and reviewing the
collection of information. All responses to this collection of
information are mandatory. Send comments regarding this burden estimate
or any other aspect of this collection of information, including
suggestions for reducing this burden to: Information Collection
Clearance Officer, Federal Aviation Administration, 10101 Hillwood
Parkway, Fort Worth, TX 76177-1524.
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 that the 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
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:
0
a. Removing Airworthiness Directive 2020-12-06, Amendment 39-21141 (85
FR 36143, June 15, 2020); and
0
b. Adding the following new airworthiness directive:
Gulfstream Aerospace Corporation: Docket No. FAA-2021-0881; Project
Identifier AD-2020-01062-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by December 10, 2021.
(b) Affected ADs
This AD replaces AD 2020-12-06, Amendment 39-21141 (85 FR 36143,
June 15, 2020) (AD 2020-12-06).
(c) Applicability
This AD applies to all Gulfstream Aerospace Corporation Model G-
IV airplanes, certificated in any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 3200, Landing Gear
System.
(e) Unsafe Condition
This AD was prompted by reports of un-commanded nose wheel
steering turns. The FAA is issuing this AD to prevent moisture from
entering the nose steering wheel servo valve, which could freeze and
cause an un-commanded nose wheel steering position during touchdown.
The unsafe condition, if not addressed, could result in a lateral
runway departure.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Retained Airplane Flight Manual Revisions for Certain Airplanes
This paragraph restates the requirements of paragraph (g)(1) and
(2) of AD 2020-12-06. Within 30 days after July 20, 2020 (the
effective date of AD2020-12-06), revise your airplane flight manual
(AFM) by incorporating the revision applicable to your airplane
configuration as listed in paragraphs (g)(1) and (2) of this AD:
(1) Gulfstream IV Airplane Flight Manual, Gulfstream Aerospace
Document Number GAC-AC-GIV-OPS-0001, Revision 52, dated October 30,
2017; or
(2) Gulfstream G300 Airplane Flight Manual, Gulfstream Aerospace
Document Number GAC-AC-G300-OPS-0001, Revision 20, dated October 30,
2017.
(h) Correction to AFM Revision for Certain Airplanes
Within 30 days after the effective date of this AD, revise your
AFM by incorporating Gulfstream G400 Airplane Flight Manual,
Gulfstream Aerospace Document Number GAC-AC-G400-OPS-0001, Revision
20, dated October 30, 2017, if applicable to your airplane
configuration.
[[Page 59065]]
(i) Retained Replacement of Nose Wheel Steering Servo Valve Manifold
With No Changes
The paragraph restates the requirements of paragraph (h) of AD
2020-12-06 with no changes. Within 36 months after July 20, 2020
(the effective date of AD2020-12-06), replace the nose wheel
steering servo valve manifold with nose wheel steering servo valve
manifold part number 5100-11 or 5105-5 in accordance with the
Accomplishment Instructions of the customer bulletin that applies to
your airplane configuration as listed in paragraphs (i)(1) through
(3) of this AD, except you are not required to comply with step H:
(1) Gulfstream IV Customer Bulletin Number 244, dated March 12,
2018;
(2) Gulfstream G300 Customer Bulletin 244, dated March 12, 2018;
or
(3) Gulfstream G400 Customer Bulletin 244, dated March 12, 2018.
(j) Retained Records Inspection and Report of Results with No Changes
This paragraph restates the requirements of paragraph (i) of AD
2020-12-06 with no changes.
(1) Between 12 months and 24 months after the replacement of the
nose wheel steering valve manifold assembly required in paragraph
(i) of this AD, inspect all aircraft records for entries of an un-
commanded nose wheel steering turn.
(2) Within 10 days after the records inspection required in
paragraph (j)(1) of this AD, report the results of the inspection,
regardless of whether the inspection found any entries, to the FAA
by either email: <a href="/cdn-cgi/l/email-protection#122b3f53415d3f53465e515d413f4077627d60667b7c75527473733c757d64"><span class="__cf_email__" data-cfemail="b48d99f5e7fb99f5e0f8f7fbe799e6d1c4dbc6c0dddad3f4d2d5d59ad3dbc2">[email protected]</span></a>; or by mail: Attn:
Continued Operational Safety, Atlanta ACO Branch, FAA, 1701 Columbia
Avenue, College Park, GA 30337. The report must include as much of
the information listed in paragraphs (j)(2)(i) through (vii) of this
AD as is known about the event:
(i) Date of records inspection;
(ii) Date and time of all un-commanded occurrences (if any);
(iii) Airplane serial number;
(iv) Weather and runway conditions at the time of each
occurrence;
(v) Copy of the pilot's report of the occurrence (if available);
(vi) Maintenance entry of the root cause of the un-commanded
deflection (if available); and
(vii) Any other information pertinent to the occurrence.
(k) 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 local Flight Standards District
Office, as appropriate. If sending information directly to the
manager of the certification office, send it to the attention of the
person identified in paragraph (l)(1) of this AD.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(l) Related Information
(1) For more information about this AD, contact Samuel Belete,
Aviation Safety Engineer, Systems and Equipment Section, FAA,
Atlanta ACO Branch, 1701 Columbia Avenue, College Park, GA 30337;
phone: (404) 474-5580; fax: (404) 474-5606; email:
<a href="/cdn-cgi/l/email-protection#295a48445c4c45074b4c454c5d4c694f4848074e465f"><span class="__cf_email__" data-cfemail="cebdafa3bbaba2e0acaba2abbaab8ea8afafe0a9a1b8">[email protected]</span></a>.
(2) For service information identified in this AD, Gulfstream
Aerospace Corporation, P.O. Box 2206, Savannah, GA 31402; phone:
(800) 810-4853; email: <a href="/cdn-cgi/l/email-protection#70000512033017051c1603040215111d5e131f1d"><span class="__cf_email__" data-cfemail="62121700112205170e0411161007030f4c010d0f">[email protected]</span></a>; website: <a href="https://www.gulfstream.com/en/customer-support/">https://www.gulfstream.com/en/customer-support/</a>. You may view this
referenced service information at the FAA Airworthiness Products
Section, Operational Safety Branch, 901 Locust, Kansas City, MO
64106. For information on the availability of this material at the
FAA, call (816) 329-4148.
Issued on October 13, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-23013 Filed 10-25-21; 8:45 am]
BILLING CODE 4910-13-P
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