Rule2022-05295
Airworthiness Directives; The Boeing Company 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
March 11, 2022
Effective
April 15, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This AD was prompted by reports of three incidents involving in-flight fan blade failures on certain Pratt & Whitney engines ("fan blades" are also known as "1st-stage low- pressure compressor (LPC) blades"--these terms are used interchangeably in this AD). This AD requires modifying the engine inlet to withstand fan blade failure event loads. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 87 Issue 48 (Friday, March 11, 2022)</title>
</head>
<body><pre>
[Federal Register Volume 87, Number 48 (Friday, March 11, 2022)]
[Rules and Regulations]
[Pages 13926-13930]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-05295]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0963; Project Identifier AD-2021-01026-T;
Amendment 39-21977; AD 2022-06-11]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain The Boeing Company Model 777-200
[[Page 13927]]
and -300 series airplanes. This AD was prompted by reports of three
incidents involving in-flight fan blade failures on certain Pratt &
Whitney engines (``fan blades'' are also known as ``1st-stage low-
pressure compressor (LPC) blades''--these terms are used
interchangeably in this AD). This AD requires modifying the engine
inlet to withstand fan blade failure event loads. The FAA is issuing
this AD to address the unsafe condition on these products.
DATES: This AD is effective April 15, 2022.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of April 15,
2022.
ADDRESSES: For Boeing service information identified in this AD,
contact Boeing Commercial Airplanes, Attention: Contractual & Data
Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA
90740-5600; telephone 562-797-1717; internet <a href="https://www.myboeingfleet.com">https://www.myboeingfleet.com</a>. For Pratt & Whitney service information
identified in this AD contact Pratt & Whitney Division, 400 Main
Street, East Hartford, CT 06118; phone: 860-565-0140; email:
<a href="/cdn-cgi/l/email-protection#c0a8a5acb0f2f480b0b2a1b4b4b7a8a9b4aea5b9eea3afad"><span class="__cf_email__" data-cfemail="5f373a332f6d6b1f2f2d3e2b2b2837362b313a26713c3032">[email protected]</span></a>; website: <a href="https://connect.prattwhitney.com">https://connect.prattwhitney.com</a>. 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. It is also available at <a href="https://www.regulations.gov">https://www.regulations.gov</a>
by searching for and locating Docket No. FAA-2021-0963.
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-2021-0963; 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: Luis Cortez-Muniz, Aerospace Engineer,
Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des
Moines, WA 98198; phone and fax: (206) 231-3958; email: <a href="/cdn-cgi/l/email-protection#703c0519035e315e331f0204150a5d3d051e190a301611115e171f06"><span class="__cf_email__" data-cfemail="6e221b071d402f402d011c1a0b1443231b0007142e080f0f40090118">[email protected]</span></a>.
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 certain The Boeing
Company Model 777-200 and -300 series airplanes. The NPRM published in
the Federal Register on December 28, 2021 (86 FR 73688). The NPRM was
prompted by reports of three incidents involving in-flight fan blade
failures on certain Pratt & Whitney engines. In the NPRM, the FAA
proposed to require modifying the engine inlet to withstand fan blade
failure event loads. The FAA is issuing this AD to address the
airplane-level implications of the unsafe condition of engine fan blade
failure. Fan blade failures can cause fan rotor imbalance and result in
fan blade fragments penetrating the inner and outer barrel of the
inlet. This condition, if not addressed could result in engine in-
flight shutdown, and could result in separation of the inlet, the fan
cowl doors, or the thrust reverser (T/R) cowl, or result in
uncontrolled engine fire. Separation of the inlet, the fan cowl doors,
or the T/R cowl could result in impact damage to the empennage and loss
of control of the airplane, or to the fuselage or windows with
potential injury to passengers; or it could result in significantly
increased aerodynamic drag causing fuel exhaustion or the inability to
maintain altitude above terrain during extended operations (ETOPS)
flights, either of which could result in a forced off-airport landing
and injury to passengers. Uncontrolled engine fire could result in loss
of control of the airplane.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from The Air Line Pilots Association,
International (ALPA), and two Anonymous commenters who supported the
NPRM without change.
The FAA received additional comments from five commenters,
including an Anonymous commenter, All Nippon Airways (ANA), Boeing,
Japan Airlines (JAL), and United Airlines (UAL). The following presents
the comments received on the NPRM and the FAA's response to each
comment.
Request To Clarify Certain Sentences in the Background Paragraph
Boeing requested that the ``Background'' paragraph in the NPRM be
revised to clarify that the failed hydraulic pump shutoff valve was not
the direct cause of the uncontained engine fire. Boeing stated that
flight data indicates that while the hydraulic pump shutoff valve
failed to close, no hydraulic fluid was leaked from the system until
well after the engine fire initiated.
Boeing proposed that two sentences in the ``Background'' paragraph
of the NPRM be revised to, ``Several flammable fluid lines, the engine
accessory gearbox, and T/R structure were fractured and an uncontained
engine fire occurred. The hydraulic pump shutoff valve failed to close
when the fire handle was pulled, contributing additional flammable
fluid to the T/R area.'' Boeing commented that the proposed wording
recognizes that the failure may have contributed additional flammable
fluid to the T/R area, but that it did not directly cause the
uncontained fire.
The FAA agrees with the commenter's clarification and did not
intend to imply that the failed hydraulic pump shutoff valve was the
direct cause of the uncontained engine fire. However, the detailed
background information, which includes the sentences that the commenter
proposed for the ``Background'' paragraph, are not carried over into
the final rule. The FAA has not changed this final rule in this regard.
Request To Use Certain Service Information as a Method of Compliance
ANA, an Anonymous commenter, Boeing, and UAL requested the use of
Boeing Alert Service Bulletin 777-71A0085 and Boeing Alert Service
Bulletin 777-71A0093, for doing the actions in paragraph (g) of the
proposed AD. Boeing stated that the description of the modification in
the proposed AD is vague.
The FAA disagrees with allowing the use of Boeing Alert Service
Bulletin 777-71A0085 and Boeing Alert Service Bulletin 777-71A0093 for
the actions specified in paragraph (g) of this AD. The service
bulletins are not yet FAA-approved. However, under the provisions of
paragraph (j) of this AD, the FAA will consider requests for approval
of the use of the service bulletins if sufficient data are submitted to
substantiate that the service bulletins would provide an acceptable
level of safety.
Request To Add Certain Exceptions for Ferry Flights
JAL requested that the FAA revise the AD to include certain
exceptions for ferry flights. JAL stated it is planning to ferry
affected airplanes to a storage point in the United States. JAL
commented that although the local
[[Page 13928]]
authority in Japan provides regulatory requirements for special flight
permissions which are similar to 14 CFR 21.197, the Japanese regulatory
requirements do not include ``to a point of storage'' language for the
purpose of the flights. JAL proposed to add the following wording to
paragraphs (c) and (g) of the proposed AD, ``except for ferry flights,
without passenger and cargo, of the airplanes on which the actions
specified in paragraphs (h)(1) and (2) of this AD have been done.''
The FAA disagrees with revising paragraph (c) Applicability or
paragraph (g) Modification of this AD in response to JAL's comment.
Paragraph (i), Special Flight Permit, provides that special flight
permits, as described in 14 CFR 21.197 and 21.199, are permitted
provided that the actions in paragraphs (h)(1) and (2) of this AD have
first been accomplished. 14 CFR 21.197(a)(1) provides, in relevant
part, that a special flight permit may be issued for flying the
aircraft to a base where repairs, alterations, or maintenance are to be
performed, or to a point of storage. The requested change is already
permitted by this AD. The FAA did not change this AD as a result of
this comment.
Request To Change the Initial Compliance Time to Before Revenue Flight
ANA requested that in paragraph (g) of the proposed AD, the FAA
update the initial compliance time of ``before further flight after the
effective date of this AD'' to ``before the next revenue flight'' to
clarify the ferry flight requirement.
Similarly, JAL requested that in paragraph (g) of the proposed AD,
the FAA update the initial compliance time of ``before further flight
after the effective of this AD'' to ``before the next revenue flight''
or ``before further flight except the ferry flight without passenger
and cargos.''
The FAA disagrees with revising the initial compliance time in
paragraph (g) of this AD as requested by ANA and JAL. The FAA has
determined it is necessary to require certain actions prior to any
flight, except as permitted in paragraph (h), Special Flight Permit, of
this AD.
Request To Provide a Threshold for the Special Flight Permit
UAL requested that the FAA provide a threshold in paragraph (h)(1)
of the proposed AD for the flow path UT inspection. UAL stated that
omitting a compliance time in paragraph (h) of the proposed AD for the
special flight permits creates ambiguity regarding when and how often
the flow path UT inspection is required for special flight permits. UAL
suggested a threshold of 275 flight cycles since the last flow path UT
inspection.
The FAA agrees to add a threshold of 275 cycles to paragraph (h)(1)
of this AD, which is specified in Pratt & Whitney Alert Service
Bulletin PW4G-112-A72-361, dated October 15, 2021. This allows
airplanes with 1st-stage LPC blades that have accumulated 275 cycles
since new or fewer to be eligible for a special flight permit.
Request for an Additional Method of Compliance
UAL requested that the FAA revise paragraph (h)(1) of the proposed
AD to add NPRM AD-2021-00830-E (86 FR 73699, December 28, 2021), as a
method of compliance for the flow path ultrasonic testing (UT)
inspection of the 1st-stage LPC blades.
The FAA disagrees with the commenter's request. The method of
compliance in Pratt & Whitney Alert Service Bulletin PW4G-112-A72-361,
dated October 15, 2021, is the same as paragraph (i)(1) of NPRM AD-
2021-00830-E (86 FR 73699, December 28, 2021) and paragraph (h)(1) of
this AD. If the actions in the service information are accomplished,
the requirements in paragraph (h)(1) of this AD will have been met, and
therefore, no change to this AD has been made.
Request To Add Aircraft Maintenance Manual Task to Special Flight
Permit
ANA and UAL requested that paragraph (h)(2) of the proposed AD
include Task 29-11-00-710-806 of the Boeing 777-200/300 Aircraft
Maintenance Manual as an acceptable method for accomplishing the
functional check of the left and right hydraulic pump shutoff valves.
The FAA agrees with the commenter's request and has added Task 29-
11-00-710-806 of Boeing 777-200/300 Aircraft Maintenance Manual to the
``Other Related Service Information'' paragraph and to Note (1) to
paragraph (h)(2) of this AD as guidance for accomplishing the actions
required by paragraph (h)(2) of this AD.
Request To Delegate Alternative Methods of Compliance (AMOCs)
UAL requested that if Boeing Alert Service Bulletin 777-71A0085 and
Boeing Alert Service Bulletin 777-71A0093 become an FAA-approved method
of compliance, the FAA should delegate The Boeing Company Organization
Designation Authorization (ODA) authority to approve structural related
AMOCs when deviations to the service documents are required.
The FAA acknowledges UAL's request, however as stated previously,
the Boeing service bulletins are not yet FAA-approved, and therefore
ODA authority is not granted at this time. In the future, should the
service bulletins be approved as a method of compliance to this AD, the
FAA may consider ODA authority delegation for approval of structural-
related AMOCs for deviations to the approved method of compliance.
Additional Change Made to This AD
In the process of preparing this final rule, the FAA noticed that
the unsafe condition statement could be improved regarding the initial
effects of the fan blade failure and the airplane level unsafe outcomes
that could result from each of those initial effects. Therefore, the
FAA has updated the unsafe condition statement in this AD to clarify
the specific causes and hazardous effects.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting this AD as
proposed. Except for minor editorial changes, and any other changes
described previously, this AD is adopted as proposed in the NPRM. None
of the changes will increase the economic burden on any operator.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Pratt & Whitney Alert Service Bulletin PW4G-112-
A72-361, dated October 15, 2021. This service information specifies
procedures for performing thermal acoustic image and ultrasonic testing
inspections of 1st-stage LPC blades. 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.
Other Related Service Information
The FAA reviewed Subtasks 26-21-00-200-018, 26-21-00-200-019, and
26-21-00-840-022, and Task 29-11-00-710-806, of Boeing 777-200/300
Aircraft Maintenance Manual, dated September 5, 2021. The service
information specifies procedures for performing a functional check of
the engine-driven pump shutoff valve.
Interim Action
The FAA considers this AD to be an interim action. The manufacturer
is currently developing other actions that will address the unsafe
condition identified in this AD. Once these actions
[[Page 13929]]
are developed, approved, and available, the FAA might consider
additional rulemaking.
Costs of Compliance
The FAA estimates that this AD affects 54 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Modification.......................... 660 work-hours x $85 per $362,560 $418,660 $22,607,640
hour = $56,100.
----------------------------------------------------------------------------------------------------------------
The FAA has received no definitive data on which to base the cost
estimates for the on-condition repairs that are part of the
modification specified in this 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.
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
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 adding the following new airworthiness
directive:
2022-06-11 The Boeing Company: Amendment 39-21977; Docket No. FAA-
2021-0963; Project Identifier AD-2021-01026-T.
(a) Effective Date
This airworthiness directive (AD) is effective April 15, 2022.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company airplanes, certificated in
any category, as specified in paragraphs (c)(1) and (2) of this AD.
(1) Model 777-200 series airplanes equipped with Pratt & Whitney
PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3
model turbofan engines.
(2) Model 777-300 series airplanes equipped with Pratt & Whitney
PW4090 and PW4098 model turbofan engines.
(d) Subject
Air Transport Association (ATA) of America Code 54, Nacelles/
pylons.
(e) Unsafe Condition
This AD was prompted by reports of three incidents involving in-
flight fan blade failures on certain Pratt & Whitney engines. The
FAA is issuing this AD to address engine fan blade failure, which
could result in engine in-flight shutdown, and could result in
separation of the inlet, the fan cowl doors, or the thrust reverser
(T/R) cowl, or result in uncontrolled engine fire. Separation of the
inlet, the fan cowl doors, or the T/R cowl could result in impact
damage to the empennage and loss of control of the airplane, or to
the fuselage or windows with potential injury to passengers; or it
could result in significantly increased aerodynamic drag causing
fuel exhaustion or the inability to maintain altitude above terrain
during extended operations (ETOPS) flights, either of which could
result in a forced off-airport landing and injury to passengers.
Uncontrolled engine fire could result in loss of control of the
airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Modification
Before further flight after the effective date of this AD,
modify the engine inlet to withstand fan blade failure event loads,
in accordance with a method approved by the Manager, Seattle ACO
Branch, FAA.
(h) Special Flight Permit
Special flight permits, as described in 14 CFR 21.197 and
21.199, are permitted provided that the actions in paragraphs (h)(1)
and (2) of this AD have first been accomplished.
(1) A flow path ultrasonic testing (UT) inspection of the 1st-
stage low-pressure compressor (LPC) blades for cracking has been
done within the last 275 cycles, as specified in the Accomplishment
Instructions, Part A--Initial Inspection of All LPC Fan Blades Prior
to their Return to Service, paragraph 1.A., of Pratt & Whitney Alert
Service Bulletin PW4G-112-A72-361, dated October 15, 2021, and the
1st-stage LPC blades have been found serviceable. This inspection is
not required for 1st-stage LPC blades with 275 cycles since new or
fewer.
(2) A functional check of the left and right hydraulic pump
shutoff valves to ensure they close in response to the corresponding
engine fire handle input and all applicable corrective actions
(i.e., repair) within 10 days prior to flight.
Note (1) to paragraph (h)(2): Guidance for accomplishing the
actions required by paragraph (h)(2) of this AD can be found in the
``Engine-Driven Pump (EDP) Shutoff Valve Check'' (Subtasks 26-21-00-
200-018, 26-21-00-200-019, and 26-21-00-840-022, or Task 29-11-00-
710-806) of Boeing 777-200/300 Aircraft Maintenance Manual.
(i) Credit for Previous Actions
This paragraph provides credit for the actions specified in
paragraph (h)(1) of this AD, if those actions were performed before
the effective date of this AD using the service information
specified in paragraph (i)(1), (2), or (3) of this AD.
[[Page 13930]]
(1) Paragraph 2. of the Accomplishment Instructions of Pratt &
Whitney Special Instruction No. 85F-21, dated May 12, 2021, for a
flow path UT inspection.
(2) Paragraph 1.a) of the Accomplishment Instructions of Pratt &
Whitney Special Instruction No. 130F-21, dated July 1, 2021, for a
flow path UT inspection.
(3) Paragraph 2.a) of the Accomplishment Instructions of Pratt &
Whitney Special Instruction No. 130F-21, Revision A, dated July 28,
2021, for a flow path UT inspection.
(j) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle 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 appropriate. If sending information directly to the manager of
the certification office, send it to the attention of the person
identified in paragraph (k)(1) of this AD. Information may be
emailed to: <a href="/cdn-cgi/l/email-protection#ead3c7aba4a7c7b98f8b9e9e868fc7aba9a5c7aba7a5a9c7b88f9b9f8f999e99aa8c8b8bc48d859c"><span class="__cf_email__" data-cfemail="20190d616e6d0d73454154544c450d61636f0d616d6f630d7245515545535453604641410e474f56">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the responsible Flight Standards Office.
(k) Related Information
(1) For more information about this AD, contact Luis Cortez-
Muniz, Aerospace Engineer, Airframe Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax:
(206) 231-3958; email: <a href="/cdn-cgi/l/email-protection#6c2019051f422d422f031e1809164121190205162c0a0d0d420b031a"><span class="__cf_email__" data-cfemail="3478415d471a751a775b4640514e1979415a5d4e745255551a535b42">[email protected]</span></a>.
(2) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (l)(3) and (4) of this AD.
(l) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Pratt & Whitney Alert Service Bulletin PW4G-112-A72-361,
dated October 15, 2021.
(ii) [Reserved]
(3) For Boeing service information identified in this AD,
contact Boeing Commercial Airplanes, Attention: Contractual & Data
Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA
90740-5600; telephone 562-797-1717; internet <a href="https://www.myboeingfleet.com">https://www.myboeingfleet.com</a>. For Pratt & Whitney service information
identified in this AD contact Pratt & Whitney Division, 400 Main
Street, East Hartford, CT 06118; phone: 860-565-0140; email:
<a href="/cdn-cgi/l/email-protection#b3dbd6dfc38187f3c3c1d2c7c7c4dbdac7ddd6ca9dd0dcde"><span class="__cf_email__" data-cfemail="afc7cac3df9d9befdfddcedbdbd8c7c6dbc1cad681ccc0c2">[email protected]</span></a>; website: <a href="https://connect.prattwhitney.com">https://connect.prattwhitney.com</a>.
(4) 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.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, <a href="/cdn-cgi/l/email-protection#f89e8ad691968b889d9b8c919796b896998a99d69f978e"><span class="__cf_email__" data-cfemail="92f4e0bcfbfce1e2f7f1e6fbfdfcd2fcf3e0f3bcf5fde4">[email protected]</span></a>, or go to: <a href="https://www.archives.gov/federal-register/cfr/ibr-locations.html">https://www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on March 4, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2022-05295 Filed 3-9-22; 4:15 pm]
BILLING CODE 4910-13-P
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on March 11, 2022.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.