Rule2021-19247
Airworthiness Directives; Airbus Helicopters
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
September 8, 2021
Effective
October 13, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is superseding Airworthiness Directive (AD) 2016-12- 51, which applied to all Airbus Helicopters Model AS332L2 and Model EC225LP helicopters. AD 2016-12-51 prohibited all further flight of Model AS332L2 and Model EC225LP helicopters. This AD requires replacing certain second stage planet gear assemblies, removing certain epicyclic modules, installing a full flow magnetic plug (FFMP), revising the existing rotorcraft flight manual (RFM) for your helicopter, repetitively inspecting the main gearbox (MGB) particle detectors, repetitively inspecting the MGB oil filter and oil cooler, and corrective action if necessary, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The actions specified in this AD terminate the flight prohibition. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 171 (Wednesday, September 8, 2021)</title>
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[Federal Register Volume 86, Number 171 (Wednesday, September 8, 2021)]
[Rules and Regulations]
[Pages 50226-50230]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-19247]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0379; Project Identifier MCAI-2021-00068-R;
Amendment 39-21667; AD 2021-16-05]
RIN 2120-AA64
Airworthiness Directives; Airbus Helicopters
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2016-12-
51, which applied to all Airbus Helicopters Model AS332L2 and Model
EC225LP helicopters. AD 2016-12-51 prohibited all further flight of
Model AS332L2 and Model EC225LP helicopters. This AD requires replacing
certain second stage planet gear assemblies, removing certain epicyclic
modules, installing a full flow magnetic plug (FFMP), revising the
existing
[[Page 50227]]
rotorcraft flight manual (RFM) for your helicopter, repetitively
inspecting the main gearbox (MGB) particle detectors, repetitively
inspecting the MGB oil filter and oil cooler, and corrective action if
necessary, as specified in a European Union Aviation Safety Agency
(EASA) AD, which is incorporated by reference. The actions specified in
this AD terminate the flight prohibition. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective October 13, 2021.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of October 13,
2021.
ADDRESSES: For EASA material incorporated by reference (IBR) in this
AD, contact the EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany;
telephone +49 221 8999 000; email <a href="/cdn-cgi/l/email-protection#b8f9fccbf8ddd9cbd996ddcdcad7c8d996ddcd"><span class="__cf_email__" data-cfemail="e3a2a790a386829082cd8696918c9382cd8696">[email protected]</span></a>; internet
www.easa.europa.eu. You may find this material on the EASA website at
<a href="https://ad.easa.europa.eu">https://ad.easa.europa.eu</a>. For Airbus Helicopters service information,
contact Airbus Helicopters, 2701 North Forum Drive, Grand Prairie, TX
75052; telephone (972) 641-0000 or (800) 232-0323; fax (972) 641-3775;
or at <a href="https://www.airbus.com/helicopters/services/technical-support.html">https://www.airbus.com/helicopters/services/technical-support.html</a>. You may view this material at the FAA, Office of the
Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N-321,
Fort Worth, TX 76177. For information on the availability of this
material at the FAA, call 817-222-5110. It is also available in the AD
docket on the internet at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for
and locating Docket No. FAA-2021-0379.
Examining the AD Docket
You may examine the AD docket on the internet at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-2021-
0379; 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: Mahmood Shah, Aviation Safety
Engineer, Fort Worth ACO Branch, FAA, 10101 Hillwood Pkwy., Fort Worth,
TX 76177; telephone 817-222-5538; email <a href="/cdn-cgi/l/email-protection#4c212d2421232328622b623f242d240c2a2d2d622b233a"><span class="__cf_email__" data-cfemail="83eee2ebeeecece7ade4adf0ebe2ebc3e5e2e2ade4ecf5">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
EASA, which is the Technical Agent for the Member States of the
European Union, has issued EASA AD 2017-0134R2, dated April 16, 2020
(EASA AD 2017-0134R2) (also referred to as the Mandatory Continuing
Airworthiness Information, or the MCAI), to correct an unsafe condition
for all Airbus Helicopters Model AS332L2 and EC225LP helicopters.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2016-12-51, Amendment 39-18578 (81 FR
43479, July 5, 2016) (AD 2016-12-51). AD 2016-12-51 applied to all
Airbus Helicopters Model AS332L2 and EC225LP helicopters. The NPRM
published in the Federal Register on June 1, 2021 (86 FR 29212). The
NPRM was prompted by an accident involving an Airbus Helicopters Model
EC225LP helicopter in which the main rotor hub detached from the MGB.
The Airbus Helicopters Model AS332L2 helicopter has a similar design to
the affected Model EC225LP helicopter, therefore, this model may be
subject to the unsafe condition revealed on the Model EC225LP
helicopter. The NPRM proposed to require replacing certain second stage
planet gear assemblies, removing certain epicyclic modules, installing
an FFMP, revising the existing RFM for your helicopter, repetitively
inspecting the MGB particle detectors, repetitively inspecting the MGB
oil filter and oil cooler, and corrective action if necessary, as
specified in EASA AD 2017-0134R2. The NPRM also proposed to provide
terminating action for certain repetitive inspections.
The FAA is issuing this AD to address failure of the main rotor
system, which would result in loss of control of the helicopter. See
the MCAI for additional background information.
Discussion of Final Airworthiness Directive
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:
<bullet> Are consistent with the intent that was proposed in the
NPRM for addressing the unsafe condition; and
<bullet> Do not add any additional burden upon the public than was
already proposed in the NPRM.
Related Service Information Under 1 CFR Part 51
EASA AD 2017-0134R2 references procedures for replacing certain
second stage planet gear assemblies with serviceable parts; removing
certain epicyclic modules from service; modifying the helicopter by
installing an FFMP; revising the RFM to prohibit MGB particle burning
in-flight; repetitively inspecting the FFMP and MGB particle detectors
for metal particles, analyzing any metal particles that are found, and
corrective action; and repetitively inspecting the MGB oil filter and
oil cooler for particles and corrective action. The corrective actions
include replacing an affected MGB with a serviceable MGB. EASA AD 2017-
0134R2 also provides terminating action for certain repetitive
inspections.
Airbus Helicopters has issued Emergency Alert Service Bulletin
05A049, Revision 6, dated July 25, 2017, for Model EC225 helicopters;
and Emergency Alert Service Bulletin 05.01.07, Revision 6, dated July
27, 2017, for Model AS332 helicopters. The service information
specifies procedures for, among other things, replacing the MGB.
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.
Differences Between This AD and the MCAI
Although the service information referenced in EASA AD 2017-0134R2
specifies to return affected planetary gear assemblies to the
manufacturer for module overhaul, this AD does not include that
requirement.
Although the service information referenced in EASA AD 2017-0134R2
specifies that retrofit of the planet gear of the MGB can only be done
by Airbus Helicopters or Airbus Helicopters approved repair centers,
this AD does not include that requirement.
EASA AD 2017-0134R2 requires operators to ``inform all flight
crews'' of revisions to the RFM, and thereafter to ``operate the
helicopter accordingly.'' However, this AD does not specifically
require those actions. FAA regulations mandate compliance with only the
operating limitations section of the flight manual. The flight manual
changes required by this AD apply to the emergency procedures section
of the existing RFM for your helicopter. Furthermore, compliance with
such
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requirements in an AD is impracticable to demonstrate or track on an
ongoing basis; therefore, a requirement to operate the aircraft in such
a manner is unenforceable. Nonetheless, the FAA recommends that flight
crews of the helicopters listed in the applicability operate in
accordance with the revised emergency procedures mandated by this AD.
Interim Action
The FAA considers this AD interim action. If final action is later
identified, the FAA might consider further rulemaking then.
Costs of Compliance
The FAA estimates that this AD affects 28 helicopters of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions *
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
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New actions.................... Up to 6 work-hours x $0 Up to $510........ Up to $14,280.
$85 per hour = $510.
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* Table does not include estimated costs for reporting.
The FAA estimates that it will take about 1 work-hour per product
to comply with the reporting requirement in this AD. The average labor
rate is $85 per hour. Based on these figures, the FAA estimates the
cost of reporting the inspection results on U.S. operators to be
$2,380, or $85 per product.
The FAA estimates the following costs to do any necessary on-
condition actions that will be required based on the results of any
required actions. The FAA has no way of determining the number of
helicopters that might need these on-condition actions:
Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
Cost per
Labor cost Parts cost product
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40 work-hours x $85 per hour = $3,400. $295,000 $298,400
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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 operators. The FAA does not control warranty coverage for
affected operators. As a result, the FAA has included all known costs
in the cost estimate.
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 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 current valid OMB control number. The control
number for the collection of information required by this AD is 2120-
0056. The paperwork cost associated with this AD has been detailed in
the Costs of Compliance section of this document and includes time for
reviewing instructions, as well as completing and reviewing the
collection of information. Therefore, all reporting associated with
this AD is mandatory. Comments concerning the accuracy of this burden
and suggestions for reducing the burden should be directed to
Information Collection Clearance Officer, Federal Aviation
Administration, 10101 Hillwood Pkwy., 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
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:
0
a. Removing Airworthiness Directive 2016-12-51, Amendment 39-18578 (81
FR 43479, July 5, 2016); and
0
b. Adding the following new airworthiness directive:
[[Page 50229]]
2021-16-05 Airbus Helicopters: Amendment 39-21667; Docket No. FAA-
2021-0379; Project Identifier MCAI-2021-00068-R.
(a) Effective Date
This airworthiness directive (AD) is effective October 13, 2021.
(b) Affected ADs
This AD replaces AD 2016-12-51, Amendment 39-18578 (81 FR 43479,
July 5, 2016) (AD 2016-12-51).
(c) Applicability
This AD applies to all Airbus Helicopters Model AS332L2 and
EC225LP helicopters, certificated in any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 6320, Main Rotor
Gearbox.
(e) Reason
This AD was prompted by an accident involving a Model EC225LP
helicopter in which the main rotor hub detached from the main
gearbox. The FAA is issuing this AD to address failure of the main
rotor system, which would result in loss of control of the
helicopter.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Requirements
Except as specified in paragraph (h) of this AD: Comply with all
required actions and compliance times specified in, and in
accordance with, European Union Aviation Safety Agency (EASA) AD
2017-0134R2, dated April 16, 2020 (EASA AD 2017-0134R2).
(h) Exceptions to EASA AD 2017-0134R2
(1) Where EASA AD 2017-0134R2 refers to the effective dates
specified in paragraphs (h)(1)(i) through (v) of this AD, this AD
requires using the effective date of this AD.
(i) The effective date of EASA AD 2017-0134R2.
(ii) October 13, 2016 (the effective date of EASA AD 2016-0199,
dated October 7, 2016).
(iii) March 20, 2017 (the effective date of EASA AD 2017-0050-E,
dated March 17, 2017).
(iv) June 30, 2017 (the effective date of EASA AD 2017-0111,
dated June 23, 2017).
(v) August 1, 2017 (the effective date of EASA AD 2017-0134,
dated July 27, 2017).
(2) The ``Remarks'' section of EASA AD 2017-0134R2 does not
apply to this AD.
(3) Where any service information referred to in EASA AD 2017-
0134R2 specifies to discard certain parts after they have been
removed from the helicopter, this AD requires removing those parts
from service.
(4) Where paragraph (2) of EASA AD 2017-0134R2 specifies to
replace a part before exceeding the applicable ``new service life
limit,'' this AD requires removing that part from service.
(5) Where any service information referred to in EASA AD 2017-
0134R2 specifies to return certain parts to the manufacturer,
including for overhaul, after they have been removed from the
helicopter, this AD does not include that requirement.
(6) Where EASA AD 2017-0134R2 refers to flight hours (FH), this
AD requires using hours time-in-service.
(7) Where any service information referred to in EASA AD 2017-
0134R2 specifies to perform a metallurgical analysis and contact the
manufacturer if unsure about the characterization of the particles
collected, this AD does require characterization of the particles
collected, however this AD does not require contacting the
manufacturer to determine the characterization of the particles
collected.
(8) Where EASA AD 2017-0134R2 requires actions during each
``after last flight'' of the day (ALF) inspection, this AD requires
those actions before the first flight of each day.
(9) Where any service information referred to in EASA AD 2017-
0134R2 specifies to do the actions identified in paragraphs
(h)(9)(i) through (iv) of this AD, this AD does not include those
requirements.
(i) Watch a video for removing the grease from the full flow
magnetic plug (FFMP), using a cleaning agent, and collecting
particles.
(ii) Return affected planetary gear assembly to the manufacturer
for module overhaul.
(iii) Contact the approved repair station/Airbus Helicopters if
the reason for a repair to an epicyclic module is unknown and
inform/contact Airbus Helicopters.
(iv) Contact the approved repair station/Airbus Helicopters
depending on who performed the last overhaul (RG) to determine if a
repair has been done on the second stage planet gears since new.
(10) Where any service information referred to in EASA AD 2017-
0134R2 specifies that retrofit of the planet gear of the main
gearbox (MGB) can only be done by Airbus Helicopters or Airbus
Helicopters approved repair centers, this AD does not require that
the retrofit of the planet gear be done only by Airbus Helicopters
or Airbus Helicopters approved repair centers. For this AD the
retrofit can also be done by an FAA-approved repair station.
(11) Where paragraph (5) of EASA AD 2017-0134R2 specifies
accomplishing the FFMP additional work within 3 months after August
1, 2017, this AD requires accomplishing the FFMP additional work
within 4 months after the effective date of this AD.
(12) Where paragraph (6) of EASA AD 2017-0134R2 specifies to
``inform all flight crews and, thereafter, operate the helicopter
accordingly,'' this AD does not require those actions.
(13) Where any service information referred to in EASA AD 2017-
0134R2 specifies that if any 16NCD13 particles are found you are to
take a 1-liter sample of oil and send it to the manufacturer, this
AD does not require those actions.
(14) Where any service information referred to in EASA AD 2017-
0134R2 specifies ``Do not resume flights until corrective action(s)
are agreed by Airbus Helicopters,'' or to contact Airbus Helicopters
before resuming flights ``if further particles are collected during
the close monitoring period'' for this AD, you must repair before
further flight using a method specified in paragraph (h)(14)(i) or
(ii) of this AD.
(i) In accordance with FAA approved procedures.
(ii) The procedures specified in Appendix 4.A., Particle
Analysis, of Airbus Helicopters Emergency Alert Service Bulletin
05A049, Revision 6, dated July 25, 2017; or Emergency Alert Service
Bulletin 05.01.07, Revision 6, dated July 27, 2017, as applicable,
except as required by paragraphs (h)(5), (7), and (13) of this AD.
(15) Where the service information identified in EASA AD 2017-
0134R2 specifies to report inspection results to Airbus Helicopters,
for this AD, report the inspection results at the applicable time
specified in paragraph (h)(15)(i) or (ii) of this AD.
(i) If the inspection was done on or after the effective date of
this AD: Submit the report within 30 days after the date of the
inspection.
(ii) If the inspection was done before the effective date of
this AD: Submit the report within 30 days after the effective date
of this AD.
(i) Credit for Previous Actions
(1) This paragraph provides credit for the actions specified in
paragraph (4) of EASA AD 2017-0134R2, if those actions were
performed before the effective date of this AD using Airbus
Helicopters Emergency Alert Service Bulletin 63.00.83 or 63A030,
both Revision 1, both dated October 7, 2016.
(2) Corrective action(s) for the inspections required by
paragraphs (8) and (10) of EASA AD 2017-0134R2 accomplished on a
helicopter before the effective date of this AD, in accordance with
Paragraph 3.B. and Appendix 4.A. of the Accomplishment Instructions
of the applicable Airbus Helicopters service information specified
in paragraphs (i)(2)(i) through (viii) of this AD, as applicable,
are acceptable to comply with the requirements of paragraph (11) of
EASA AD 2017-0134R2 for that helicopter, but only for the corrective
actions for the inspections required by paragraphs (8) and (10) of
EASA AD 2017-0134R2.
(i) Emergency Alert Service Bulletin 05.01.07, Revision 2, dated
October 7, 2016.
(ii) Emergency Alert Service Bulletin 05.01.07, Revision 3,
dated February 25, 2017.
(iii) Emergency Alert Service Bulletin 05.01.07, Revision 4,
dated March 17, 2017.
(iv) Emergency Alert Service Bulletin 05.01.07, Revision 5,
dated June 23, 2017.
(v) Emergency Alert Service Bulletin 05A049, Revision 2, dated
October 7, 2016.
(vi) Emergency Alert Service Bulletin 05A049, Revision 3, dated
February 25, 2017.
(vii) Emergency Alert Service Bulletin 05A049, Revision 4, dated
March 17, 2017.
(viii) Emergency Alert Service Bulletin 05A049, Revision 5,
dated June 23, 2017.
(j) Special Flight Permit
Special flight permits, as described in 14 CFR 21.197 and
21.199, are prohibited.
[[Page 50230]]
(k) Alternative Methods of Compliance (AMOCs)
(1) The Manager, International Validation 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 International Validation Branch, send
it to the attention of the person identified in paragraph (l)(1) of
this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#c6ffeb879095eb878f94ebf1f5f6eb878b898586a0a7a7e8a1a9b0"><span class="__cf_email__" data-cfemail="f7cedab6a1a4dab6bea5dac0c4c7dab6bab8b4b7919696d9909881">[email protected]</span></a>.
(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 Mahmood Shah,
Aviation Safety Engineer, Fort Worth ACO Branch, FAA, 10101 Hillwood
Pkwy., Fort Worth, TX 76177; telephone 817-222-5538; email
<a href="/cdn-cgi/l/email-protection#e78a868f8a888883c980c9948f868fa7818686c9808891"><span class="__cf_email__" data-cfemail="a3cec2cbceccccc78dc48dd0cbc2cbe3c5c2c28dc4ccd5">[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 (m)(4) and (5) of this AD.
(m) 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 this AD specifies otherwise.
(i) European Union Aviation Safety Agency (EASA) AD 2017-0134R2,
dated April 16, 2020.
(ii) Airbus Helicopters Emergency Alert Service Bulletin 05A049,
Revision 6, dated July 25, 2017.
(iii) Airbus Helicopters Emergency Alert Service Bulletin
05.01.07, Revision 6, dated July 27, 2017.
(3) For EASA AD 2017-0134R2, contact the EASA, Konrad-Adenauer-
Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email
<a href="/cdn-cgi/l/email-protection#f6b7b285b693978597d8938384998697d89383"><span class="__cf_email__" data-cfemail="d9989daa99bcb8aab8f7bcacabb6a9b8f7bcac">[email protected]</span></a>; Internet www.easa.europa.eu. You may find this
EASA AD on the EASA website at <a href="https://ad.easa.europa.eu">https://ad.easa.europa.eu</a>.
(4) For Airbus Helicopters service information, contact Airbus
Helicopters, 2701 North Forum Drive, Grand Prairie, TX 75052;
telephone (972) 641-0000 or (800) 232-0323; fax (972) 641-3775; or
at <a href="https://www.airbus.com/helicopters/services/technical-support.html">https://www.airbus.com/helicopters/services/technical-support.html</a>.
(5) You may view this service information at the FAA, Office of
the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room
6N-321, Fort Worth, TX 76177. For information on the availability of
this material at the FAA, call 817-222-5110. This material may be
found in the AD docket on the internet at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-
2021-0379.
(6) You may view this material that is incorporated by reference
at the National Archives and Records Administration (NARA). For
information on the availability of this material at NARA, email
<a href="/cdn-cgi/l/email-protection#b1d7c39fd8dfc2c1d4d2c5d8dedff1dfd0c3d09fd6dec7"><span class="__cf_email__" data-cfemail="fb9d89d59295888b9e988f929495bb959a899ad59c948d">[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 July 22, 2021.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021-19247 Filed 9-7-21; 8:45 am]
BILLING CODE 4910-13-P
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