Rule2021-12435
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
June 15, 2021
Effective
July 20, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. This AD was prompted by a report that a number of nacelle A- frames were not manufactured in accordance with engineering drawings. This AD requires, depending on airplane configuration, removing the fasteners on the nacelle A-frame side brace sub-assemblies, doing an eddy current inspection for cracking, cold-working the holes, installing oversize fasteners, re-identifying the reworked side brace fitting and A-frame, and repair if necessary. 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 113 (Tuesday, June 15, 2021)</title>
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[Federal Register Volume 86, Number 113 (Tuesday, June 15, 2021)]
[Rules and Regulations]
[Pages 31599-31601]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-12435]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0183; Project Identifier MCAI-2020-01408-T;
Amendment 39-21589; AD 2021-12-02]
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 Model DHC-8-400 series
airplanes. This AD was prompted by a report that a number of nacelle A-
frames were not manufactured in accordance with engineering drawings.
This AD requires, depending on airplane configuration, removing the
fasteners on the nacelle A-frame side brace sub-assemblies, doing an
eddy current inspection for cracking, cold-working the holes,
installing oversize fasteners, re-identifying the reworked side brace
fitting and A-frame, and repair if necessary. The FAA is issuing this
AD to address the unsafe condition on these products.
DATES: This AD is effective July 20, 2021.
The Director of the Federal Register approved the incorporation by
reference of certain publication listed in this AD as of July 20, 2021.
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="91e5f9f5d1f5f4f9f0e7f8fdfdf0fff5bff2fefc">[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-2021-0183.
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-
0183; 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; fax 516-
794-5531; email <a href="/cdn-cgi/l/email-protection#e1d8cc809792cc8f9880828ecc828e92a1878080cf868e97"><span class="__cf_email__" data-cfemail="edd4c08c9b9ec083948c8e82c08e829ead8b8c8cc38a829b">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2020-39, dated October 14,
2020 (TCCA AD CF-2020-39) (also referred to as the Mandatory Continuing
Airworthiness Information, or the MCAI), to correct an unsafe condition
for certain De Havilland Aircraft of Canada Limited Model DHC-8-400
series 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-2021-0183.
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 Model DHC-8-400 series airplanes. The NPRM
published in the Federal Register on March 22, 2021 (86 FR 15149). The
NPRM was prompted by a report that a number of nacelle A-frames were
not manufactured in accordance with engineering drawings. The holes in
the side brace sub-assemblies were not cold-worked as required. As a
result the side brace fitting might not meet its fatigue life, and
cracking of the A-frame bottom flange may result. The NPRM proposed to
require, depending on airplane configuration, removing the fasteners on
the nacelle A-frame side brace sub-assemblies, doing an eddy current
inspection for cracking, cold-working the holes, installing oversize
fasteners, re-identifying the reworked side brace fitting and A-frame,
and repair if necessary. The FAA is issuing this AD to address possible
cracking of the A-frame. This condition, if not addressed, may lead to
collapse of the main landing gear (MLG). See the MCAI for additional
background information.
Comments
The FAA gave the public the opportunity to participate in
developing this final rule. The FAA has considered the comment
received. The Air Line Pilots Association, International (ALPA), stated
that it supports the NPRM.
Conclusion
The FAA reviewed the relevant data, considered the comment
received, 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
De Havilland Aircraft of Canada Limited has issued Service Bulletin
84-54-32, dated October 10, 2019. This service information describes
procedures, depending on airplane configuration, for removing the
fasteners on the nacelle A-frame side brace sub-assemblies, doing an
eddy current inspection for cracking, cold-working the holes,
installing oversize fasteners, and re-identifying the reworked side
brace fitting and A-frame.
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.
Costs of Compliance
The FAA estimates that this AD affects 41 airplanes of U.S.
registry. The
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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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15 work-hours x $85 per hour = $1,275........................ $254 $1,529 $62,689
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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.
Adoption of 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:
2021-12-02 De Havilland Aircraft of Canada Limited (Type Certificate
Previously Held by Bombardier, Inc.): Amendment 39-21589; Docket No.
FAA-2021-0183; Project Identifier MCAI-2020-01408-T.
(a) Effective Date
This airworthiness directive (AD) is effective July 20, 2021.
(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-8-400, -
401, and -402 airplanes, certificated in any category, serial
numbers 4081 through 4591 inclusive.
(d) Subject
Air Transport Association (ATA) of America Code 54, Nacelles/
pylons.
(e) Reason
This AD was prompted by a report that a number of nacelle A-
frames were not manufactured in accordance with engineering
drawings. The holes in the side brace sub-assemblies were not cold-
worked as required. As a result the side brace fitting might not
meet its fatigue life, and cracking of the A-frame bottom flange may
result. The FAA is issuing this AD to address possible cracking of
the A-frame. This condition, if not addressed, may lead to collapse
of the main landing gear (MLG).
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Within the compliance time specified in paragraph (g)(2) of
this AD, do the applicable actions specified in paragraphs (g)(1)(i)
and (ii) of this AD.
(i) For airplanes having serial numbers 4081 through 4582
inclusive: Remove the fasteners on the nacelle A-frame side brace
sub-assemblies, do an eddy current inspection for cracking on
airplanes having 30,000 total flight cycles or more, cold-work the
holes, and install oversize fasteners, in accordance with Part A of
paragraph 3.B. of the Accomplishment Instructions of De Havilland
Aircraft of Canada Limited Service Bulletin 84-54-32, dated October
10, 2019. If any cracking is found, before further flight, repair
the cracking 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.
(ii) For all airplanes: Re-identify the reworked side brace
fitting and A-frame, in accordance with Part B of paragraph 3.B. of
the Accomplishment Instructions of De Havilland Aircraft of Canada
Limited Service Bulletin 84-54-32, dated October 10, 2019.
(2) At the earlier of the times specified in paragraphs
(g)(2)(i) and (ii) of this AD, do the applicable actions specified
in paragraph (g)(1) of this AD.
(i) Within 48 months or 8,000 flight hours after the effective
date of this AD, whichever occurs first.
(ii) At the later of the times specified in paragraphs
(g)(2)(ii)(A) and (B) of this AD.
(A) Before accumulating 40,000 total flight cycles.
(B) Within 12 months or 1,290 flight cycles after the effective
date of this AD, whichever occurs first.
(h) 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
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by the Manager, New York ACO Branch, FAA; or TCCA; or De Havilland
Aircraft of Canada Limited's TCCA DAO. If approved by the DAO, the
approval must include the DAO-authorized signature.
(i) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2020-39, dated October 14, 2020, 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-2021-0183.
(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#d4edf9b5a2a7f9baadb5b7bbf9b7bba794b2b5b5fab3bba2"><span class="__cf_email__" data-cfemail="ab9286caddd886c5d2cac8c486c8c4d8ebcdcaca85ccc4dd">[email protected]</span></a>.
(j) 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-
54-32, dated October 10, 2019.
(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#0f7b676b4f6b6a676e796663636e616b216c6062"><span class="__cf_email__" data-cfemail="14607c705470717c75627d7878757a703a777b79">[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#1b7d7e7f697e7c35777e7c7a775b757a697a357c746d"><span class="__cf_email__" data-cfemail="096f6c6d7b6c6e27656c6e68654967687b68276e667f">[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 25, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-12435 Filed 6-14-21; 8:45 am]
BILLING CODE 4910-13-P
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