Proposed Rule2022-03718
Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) 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
February 23, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited (type certificate previously held by Bombardier, Inc.) Model DHC-8-401 and -402 airplanes. This proposed AD was prompted by reports of a certain bolt at the pivot pin link being found missing or having stress corrosion cracking. This proposed AD would require a modification to the nose landing gear (NLG) shock strut assembly. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 87 Issue 36 (Wednesday, February 23, 2022)</title>
</head>
<body><pre>
[Federal Register Volume 87, Number 36 (Wednesday, February 23, 2022)]
[Proposed Rules]
[Pages 10112-10115]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-03718]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0143; Project Identifier MCAI-2021-01401-T]
RIN 2120-AA64
Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain De Havilland Aircraft of Canada Limited (type certificate
previously held by Bombardier, Inc.) Model DHC-8-401 and -402
airplanes. This proposed AD was prompted by reports of a certain bolt
at the pivot pin link being found missing or having stress corrosion
cracking. This proposed AD would require a modification to the nose
landing gear (NLG) shock strut assembly. 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 April 11,
2022.
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 De
Havilland Aircraft of Canada Limited, Q-Series
[[Page 10113]]
Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5,
Canada; telephone 416-375-4000; fax 416-375-4539; email
<a href="/cdn-cgi/l/email-protection#8afee2eecaeeefe2ebfce3e6e6ebe4eea4e9e5e7"><span class="__cf_email__" data-cfemail="23574b476347464b42554a4f4f424d470d404c4e">[email protected]</span></a>; internet <a href="https://dehavilland.com">https://dehavilland.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.
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-2022-0143; 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: Antariksh Shetty, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#447d69253237692a3d25272b69272b37042225256a232b32"><span class="__cf_email__" data-cfemail="0c35216d7a7f2162756d6f63216f637f4c6a6d6d226b637a">[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-2022-0143; Project Identifier
MCAI-2021-01401-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 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
Antariksh Shetty, Aerospace Engineer, Airframe and Propulsion Section,
FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#fec7d39f888dd390879f9d91d39d918dbe989f9fd0999188"><span class="__cf_email__" data-cfemail="073e2a6671742a697e6664682a6468744761666629606871">[email protected]</span></a>. Any
commentary that the FAA receives which is not specifically designated
as CBI will be placed in the public docket for this rulemaking.
Background
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2009-29R4, dated October 1,
2021 (TCCA AD CF-2009-29R4) (also referred to after this as the
Mandatory Continuing Airworthiness Information, or the MCAI), to
correct an unsafe condition for certain De Havilland Aircraft of Canada
Limited Model DHC-8-401 and -402 airplanes. You may examine the MCAI in
the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and
locating Docket No. FAA-2022-0143.
The FAA issued AD 2021-25-12, Amendment 39-21856 (86 FR 72174,
December 21, 2021) (AD 2021-25-12), for certain De Havilland Aircraft
of Canada Limited Model DHC-8-401 and -402 airplanes. AD 2021-25-12
requires repetitive lubrications of the trailing arm of the NLG, which
include a general visual inspection of the NLG pivot pin mechanism for
discrepancies and replacement of missing or damaged bolts. AD 2021-25-
12 also requires revising the existing maintenance or inspection
program to include new and revised airworthiness limitations (life
limits for certain bolts). AD 2021-25-12 corresponds to TCCA AD CF-
2009-29R4, except AD 2021-25-12 does not include the modification to
the NLG shock strut assembly specified in Part I of TCCA AD CF-2009-
29R4. AD 2021-25-12 explained that the FAA was considering further
rulemaking to require the modification. The FAA has now determined that
further rulemaking is necessary, and this proposed AD follows from that
determination.
The FAA is proposing this AD to address failure of the pivot pin
retention bolt, which could result in a loss of directional control or
loss of an NLG tire during takeoff or landing, which could lead to
runway excursions. See the MCAI for additional background information.
Relationship Between Proposed AD and AD 2021-25-12
This NPRM does not propose to supersede AD 2021-25-12. Rather, the
FAA has determined that a stand-alone AD would be more appropriate.
This proposed AD would require the modification specified in Part I of
TCCA AD CF-2009-29R4 that was not included in AD 2021-25-12.
Related Service Information Under 1 CFR Part 51
De Havilland Aircraft of Canada Limited has issued Service Bulletin
84-32-161, Revision B, dated March 31, 2021, including UTC Aerospace
Systems Service Bulletin 47100-32-145, Revision 3, dated March 26,
2021. This service information describes procedures for modifying the
NLG shock strut assembly by replacing special bolt, part number (P/N)
47205-1 or 47205-3, with a new retention bolt, P/N NAS6204-14D (the
modification includes a reverse orientation of the retention bolt and a
rework of the weight on wheel (WOW) proximity sensor cover to provide
clearance for the re-oriented retention bolt).
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.
FAA's Determination
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 would require accomplishing the actions specified
in the service information already described.
[[Page 10114]]
Differences Between This Proposed AD and the MCAI or Service
Information
This proposed AD would only require the modification specified in
Part I of TCCA AD CF-2009-29R4. The other actions specified in TCCA AD
CF-2009-29R4 are required by FAA AD 2021-25-12.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 54 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
4 work-hours x $85 per hour = $340........................... $8 $348 $18,792
----------------------------------------------------------------------------------------------------------------
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 this 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 adding the following new airworthiness
directive:
De Havilland Aircraft of Canada Limited (Type Certificate Previously
Held by Bombardier, Inc.): Docket No. FAA-2022-0143; Project
Identifier MCAI-2021-01401-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by April 11, 2022.
(b) Affected ADs
None.
(c) Applicability
This AD applies to De Havilland Aircraft of Canada Limited (type
certificate previously held by Bombardier, Inc.) Model DHC-8-401 and
-402 airplanes, certificated in any category, serial numbers 4001
and 4003 and subsequent.
(d) Subject
Air Transport Association (ATA) of America Code 32, Landing
gear.
(e) Unsafe Condition
This AD was prompted by reports of a certain bolt at the pivot
pin link being found missing or having stress corrosion cracking.
The FAA is issuing this AD to address failure of the pivot pin
retention bolt, which could result in a loss of directional control
or loss of a nose landing gear (NLG) tire during takeoff or landing,
which could lead to runway excursions.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Modification
For any airplane having an NLG shock strut assembly, part number
(P/N) 47100-XX (where XX represents any number), that has special
bolt P/N 47205-1 or 47205-3: Within 1,600 flight cycles or 9 months
after the effective date of this AD, whichever occurs first, modify
the NLG shock strut assembly, in accordance with paragraph 3.B.,
``Procedure,'' of the Accomplishment Instructions of De Havilland
Aircraft of Canada Limited Service Bulletin 84-32-161, Revision B,
dated March 31, 2021, including UTC Aerospace Systems Service
Bulletin 47100-32-145, Revision 3, dated March 26, 2021.
(h) Credit for Previous Actions
This paragraph provides credit for actions required by paragraph
(g) of this AD, if those actions were performed before the effective
date of this AD using De Havilland Aircraft of Canada Limited
Service Bulletin 84-32-161, dated April 7, 2020, including UTC
Aerospace Systems Service Bulletin 47100-32-145, dated April 3,
2020; or De Havilland Aircraft of Canada Limited Service Bulletin
84-32-161, Revision A, dated January 27, 2021, including UTC
Aerospace Systems Service Bulletin 47100-32-145, Revision 2, dated
January 4, 2021.
(i) Other FAA AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York 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 ATTN: Program Manager, Continuing Operational
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. Before
using any approved AMOC, notify your appropriate principal
inspector, or lacking a principal inspector, the manager of the
responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, New York ACO
Branch, FAA; or Transport Canada Civil Aviation
[[Page 10115]]
(TCCA); or De Havilland Aircraft of Canada Limited's TCCA Design
Approval Organization (DAO). If approved by the DAO, the approval
must include the DAO-authorized signature.
(j) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2009-29R4, dated October 1, 2021, for related
information. This MCAI 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-2022-0143.
(2) For more information about this AD, contact Antariksh
Shetty, Aerospace Engineer, Airframe and Propulsion Section, FAA,
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone 516-228-7300; fax 516-794-5531; email <a href="/cdn-cgi/l/email-protection#0c35216d7a7f2162756d6f63216f637f4c6a6d6d226b637a"><span class="__cf_email__" data-cfemail="a0998dc1d6d38dced9c1c3cf8dc3cfd3e0c6c1c18ec7cfd6">[email protected]</span></a>.
(3) For service information identified in this AD, contact De
Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk,
123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone
416-375-4000; fax 416-375-4539; email <a href="/cdn-cgi/l/email-protection#8bffe3efcbefeee3eafde2e7e7eae5efa5e8e4e6"><span class="__cf_email__" data-cfemail="75011d113511101d14031c1919141b115b161a18">[email protected]</span></a>; internet
<a href="https://dehavilland.com">https://dehavilland.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.
Issued on February 15, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2022-03718 Filed 2-22-22; 8:45 am]
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 February 23, 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.