Rule2022-11758
Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Primary source
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Published
June 3, 2022
Effective
July 8, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting 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 AD was prompted by reports of a certain bolt at the pivot pin link being found missing or having stress corrosion cracking. This AD requires a modification to the nose landing gear (NLG) shock strut assembly. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 87 Issue 107 (Friday, June 3, 2022)</title>
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[Federal Register Volume 87, Number 107 (Friday, June 3, 2022)]
[Rules and Regulations]
[Pages 33627-33630]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-11758]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0143; Project Identifier MCAI-2021-01401-T;
Amendment 39-22061; AD 2022-11-11]
RIN 2120-AA64
Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain De Havilland Aircraft of Canada Limited (type certificate
previously held by Bombardier, Inc.) Model DHC-8-401 and -402
airplanes. This AD was prompted by reports of a certain bolt at the
pivot pin link being found missing or having stress corrosion cracking.
This AD requires a modification to the nose landing gear (NLG) shock
strut assembly. The FAA is issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective July 8, 2022.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of July 8,
2022.
ADDRESSES: For service information identified in this final rule,
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#6d1905092d0908050c1b0401010c0309430e0200"><span class="__cf_email__" data-cfemail="087c606c486c6d60697e61646469666c266b6765">[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. It is also
available 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.
[[Page 33628]]
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-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 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: 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#83baaee2f5f0aeedfae2e0ecaee0ecf0c3e5e2e2ade4ecf5"><span class="__cf_email__" data-cfemail="9fa6b2fee9ecb2f1e6fefcf0b2fcf0ecdff9fefeb1f8f0e9">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued 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 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.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain De Havilland
Aircraft of Canada Limited (type certificate previously held by
Bombardier, Inc.) Model DHC-8-401 and -402 airplanes. The NPRM
published in the Federal Register on February 23, 2022 (87 FR 10112).
The NPRM was prompted by reports of a certain bolt at the pivot pin
link being found missing or having stress corrosion cracking. The NPRM
proposed to require a modification to the NLG shock strut assembly. 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 an
NLG tire during takeoff or landing, which could lead to runway
excursions. See the MCAI for additional background information.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from Air Line Pilots Association,
International (ALPA), who supported the NPRM without change.
The FAA received additional comments from Horizon Air. The
following presents the comments received on the NPRM and the FAA's
response to each comment.
Request to Issue a Single AD
Horizon Air requested that the FAA issue a single AD instead of
both AD 2021-25-12, Amendment 39-21856 (86 FR 72174, December 21, 2021)
(AD 2021-25-12), and this AD. Horizon Air noted that in the
``Relationship Between Proposed AD and AD 2021-25-12'' paragraph of the
NPRM, it stated it was determined that a stand-alone AD would be more
appropriate. Horizon Air pointed out this AD and AD 2021-25-12 were
both prompted by the same unsafe condition and the applicability is the
same. Horizon Air suggested that this final rule replace AD 2021-25-12
in order to have the subject matter mandates in a singular rule.
Horizon Air concluded that having the new AD state the retained
requirements and new requirements would promote compliance, be
historically consistent, and be congruent with the related Transport
Canada airworthiness directive (TCCA AD CF-2009-29R4).
The FAA disagrees with the commenter's request. The FAA
acknowledges that a single AD is typically more appropriate. However,
AD 2021-25-12 is an immediately adopted rule (i.e., a final rule;
request for comment) that includes actions with short compliance times.
The FAA could not include Part I of TCCA AD CF-2009-29R4 in AD 2021-25-
12 due to the longer compliance time for the required modification,
which necessitated issuing an NPRM with a public comment period. The
FAA considered superseding AD 2021-25-12 to include retained actions
and the modification, which has a 1,600 flight cycles or 9-month
compliance time. However, issuing an NPRM to supersede AD 2021-25-12
would have delayed the rulemaking process. The FAA determined issuing a
stand-alone NPRM for the modification addresses the unsafe condition in
a timely manner as the final rule for the stand-alone NPRM (this AD)
will be published sooner than when a final rule for an NPRM that
supersedes AD 2021-25-12 would be published. The FAA has not changed
this AD in this regard.
Request To Include a Statement To Indicate the Association With AD
2021-25-12
Horizon Air requested that the FAA include a statement to indicate
the association with AD 2021-25-12. Horizon Air stated that the actions
required by AD 2021-25-12 are only applicable to airplanes with pivot
pin retention bolt part number (P/N) NAS6204-14D installed on the NLG
assembly; consequently, if this part is not installed the rule is not
applicable. Horizon Air also stated that this AD mandates the
installation of this part. Horizon Air concluded that a statement
indicating the association with AD 2021-25-12 would enhance the
awareness of the compliance requirements.
The FAA concurs with the commenter's request. The actions required
by AD 2021-25-12 only apply to airplanes that have installed pivot pin
retention bolt P/N NAS6204-14D in the NLG assembly and therefore do not
apply to those airplanes that do not have that pivot pin retention bolt
installed. The modification required by paragraph (g) of this AD
results in the installation of pivot pin retention bolt P/N NAS6204-
14D. After an operator has complied with this AD, the operator is then
subject to AD 2021-25-12. As specified in paragraph (g) of AD 2021-25-
12, the operator must revise the existing maintenance or inspection
program ``. . . within 30 days after the installation of pivot pin
retention bolt part number P/N NAS6204-14D. . . .'' As specified in
paragraph (i) of AD 2021-25-12, repetitive lubrications of the part are
required at intervals not to exceed 400 flight cycles. The FAA has
added Note 1 to paragraph (g) of this AD to refer to AD 2021-25-12
after installing pivot pin retention bolt P/N NAS6204-14D.
Conclusion
The FAA reviewed the relevant data, considered the 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.
Accordingly, the FAA is issuing this AD to address the unsafe condition
on these products.
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,
[[Page 33629]]
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.
Difference Between This AD and the MCAI
This AD only requires 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 affects 54 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
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Cost per Cost on U.S.
Labor cost Parts cost product operators
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4 work-hours x $85 per hour = $340........................... $8 $348 $18,792
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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:
2022-11-11 De Havilland Aircraft of Canada Limited (Type Certificate
Previously Held by Bombardier, Inc.): Amendment 39-22061; Docket No.
FAA-2022-0143; Project Identifier MCAI-2021-01401-T.
(a) Effective Date
This airworthiness directive (AD) is effective July 8, 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.
Note 1 to paragraph (g): After installing pivot pin retention
bolt part number NAS6204-14D, AD 2021-25-12, Amendment 39-21856 (86
FR 72174, December 21, 2021) applies to pivot pin retention bolt
part number NAS6204-14D.
(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:
[[Page 33630]]
(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 (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#4a73672b3c396724332b2925672925390a2c2b2b642d253c"><span class="__cf_email__" data-cfemail="596074382f2a743720383a36743a362a193f3838773e362f">[email protected]</span></a>.
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (k)(3) and (4) of this AD.
(k) 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) 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.
Note 2 to paragraph (k)(2)(i): De Havilland issued De Havilland
Service Bulletin 84-32-161, Revision B, dated March 31, 2021, with
UTC Aerospace Systems Service Bulletin 47100-32-145, Revision 3,
dated March 26, 2021, attached as one ``merged'' file for the
convenience of affected operators.
(ii) [Reserved]
(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#32465a567256575a53445b5e5e535c561c515d5f"><span class="__cf_email__" data-cfemail="b6c2ded2f6d2d3ded7c0dfdadad7d8d298d5d9db">[email protected]</span></a>; internet
<a href="https://dehavilland.com">https://dehavilland.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, email <a href="/cdn-cgi/l/email-protection#0a6c78246364797a6f697e6365644a646b786b246d657c"><span class="__cf_email__" data-cfemail="1d7b6f3374736e6d787e697472735d737c6f7c337a726b">[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 May 17, 2022.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2022-11758 Filed 6-2-22; 8:45 am]
BILLING CODE 4910-13-P
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