Proposed Rule2021-13726
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 29, 2021
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 Model DHC-8-400, - 401, and -402 airplanes. This proposed AD was prompted by a report that the epoxy primer on the internal bore of the nacelle and landing gear attachment pins was not applied, and corrosion on the internal bore of the wing rear spar attachment pins was found. This proposed AD would require doing a detailed visual inspection of the nacelle to wing rear spar attachment pins, and the nacelle and landing gear attachment pins, for any corrosion, and doing all applicable corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 86 Issue 122 (Tuesday, June 29, 2021)</title>
</head>
<body><pre>
[Federal Register Volume 86, Number 122 (Tuesday, June 29, 2021)]
[Proposed Rules]
[Pages 34163-34165]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-13726]
========================================================================
Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
========================================================================
Federal Register / Vol. 86, No. 122 / Tuesday, June 29, 2021 /
Proposed Rules
[[Page 34163]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0514; Project Identifier MCAI-2020-01570-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 Model DHC-8-400, -
401, and -402 airplanes. This proposed AD was prompted by a report that
the epoxy primer on the internal bore of the nacelle and landing gear
attachment pins was not applied, and corrosion on the internal bore of
the wing rear spar attachment pins was found. This proposed AD would
require doing a detailed visual inspection of the nacelle to wing rear
spar attachment pins, and the nacelle and landing gear attachment pins,
for any corrosion, and doing all applicable corrective actions. 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 August 13,
2021.
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 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#3d4955597d5958555c4b5451515c5359135e5250"><span class="__cf_email__" data-cfemail="aedac6caeecacbc6cfd8c7c2c2cfc0ca80cdc1c3">[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-2021-0514; 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: Deep Gaurav, 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#685145091e1b450611090b07450b071b280e0909460f071e"><span class="__cf_email__" data-cfemail="84bda9e5f2f7a9eafde5e7eba9e7ebf7c4e2e5e5aae3ebf2">[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-2021-0514; Project Identifier
MCAI-2020-01570-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 Deep
Gaurav, 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#5b62763a2d287635223a3834763834281b3d3a3a753c342d"><span class="__cf_email__" data-cfemail="c1f8eca0b7b2ecafb8a0a2aeeca2aeb281a7a0a0efa6aeb7">[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-2020-51R1, dated February
24, 2021 (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-8-400, -
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-2021-0514.
This proposed AD was prompted by a report that the epoxy primer on
the internal bore of the nacelle and landing gear attachment pins was
not applied, and corrosion on the internal bore of the wing rear spar
attachment pins was found. The FAA is proposing this AD to
[[Page 34164]]
address premature corrosion and subsequent failure of the nacelle to
landing gear and nacelle to rear wing spar attachment pins, which if
undetected, could lead to a single or dual collapse of the main landing
gear. See the MCAI for additional background information.
Related Service Information Under 1 CFR Part 51
De Havilland Aircraft of Canada Limited has issued-Service Bulletin
84-54-28, Revision B, dated January 24, 2020; and Service Bulletin 84-
54-31, Revision B, dated February 21, 2020. This service information
describes procedures for doing a detailed visual inspection of the
nacelle to wing rear spar attachment pins, and the nacelle and landing
gear attachment pins, for any corrosion; and doing all applicable
corrective actions. Corrective actions include applying epoxy primer to
the bore surface of the pins, a fluorescent magnetic particle
inspection for any cracking, corrosion removal, reworking and part
marking certain pins, and replacing any cracked or corroded pins with
serviceable pins. These documents are distinct since they apply to
different airplane configurations.
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.
Differences Between This Proposed AD and the MCAI or Service
Information
Where Part III of TCCA CF-2020-51R1, dated February 24, 2021,
specifies a detailed visual inspection and rectification of the nacelle
and landing gear attachment pins, this AD requires a re-part mark of
the yoke attachment pin as specified in Part B of the Accomplishment
Instructions of De Havilland Service Bulletin 84-54-31, Revision B,
dated February 21, 2020.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 41 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 9 work-hours x $85 per hour = Up $0 Up to $765................ Up to $31,365.
to $765.
----------------------------------------------------------------------------------------------------------------
The FAA has received no definitive data on which to base the cost
estimates for the on-condition actions specified in this proposed 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
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-2021-0514; Project
Identifier MCAI-2020-01570-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by August 13, 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 4001, 4003 through 4550 inclusive, 4583 through 4585
inclusive, 4587, 4588, and 4590.
(d) Subject
Air Transport Association (ATA) of America Code 54, Nacelles/
pylons.
(e) Unsafe Condition
This AD was prompted by a report that the epoxy primer on the
internal bore of the
[[Page 34165]]
nacelle and landing gear attachment pins was not applied, and
corrosion on the internal bore of the wing rear spar attachment pins
was found. The FAA is issuing this AD to address premature corrosion
and subsequent failure of the nacelle to landing gear and nacelle to
rear wing spar attachment pins, which if undetected, could lead to a
single or dual collapse of the main landing gear.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Inspection and Corrective Actions
(1) At the applicable compliance times specified in paragraphs
(g)(1)(i) through (iii) of this AD: Do a detailed visual inspection
of the nacelle to wing rear spar attachment pins, and the nacelle
and landing gear attachment pins, for any cracking or corrosion, and
do all applicable corrective actions, in accordance with Part A or
Part B, as applicable, of Section 3., ``Accomplishment
Instructions,'' of the applicable service information specified in
figure 1 to paragraph (g) of this AD. Do all applicable corrective
actions before further flight.
[GRAPHIC] [TIFF OMITTED] TP29JN21.278
(i) For nacelle to wing rear spar attachment pins, or nacelle
and landing gear attachment pins, as applicable, that have
accumulated less than 26,000 flight cycles as of the effective date
of this AD, and have been in service less than 12 years from their
entry-into-service as of the effective date of this AD: Prior to the
pins reaching 14 years from their entry-into-service, or prior to
the airplane reaching 30,000 total flight cycles, whichever occurs
first.
(ii) For nacelle to wing rear spar attachment pins, or nacelle
and landing gear attachment pins, as applicable, that have
accumulated 26,000 flight cycles or more as of the effective date of
this AD, or have been in service 12 years or more from their entry-
into-service as of the effective date of this AD: Within 4 years or
8,000 flight hours after the effective date of this AD, whichever
occurs first.
(iii) For airplanes on which the actions specified in Bombardier
Service Bulletin 84-54-27, dated August 11, 2017; or Bombardier
Service Bulletin 84-54-28, dated August 11, 2017; as applicable,
have been accomplished: Within 14 years or 30,000 flight cycles
after the date of incorporation of Bombardier Service Bulletin 84-
54-27, dated August 11, 2017; or Bombardier Service Bulletin 84-54-
28, dated August 11, 2017; as applicable, whichever occurs first.
(2) For serial numbers 4583, 4584, 4585, 4587, 4588 and 4590: At
the applicable compliance times specified in paragraphs (g)(1)(i)
through (iii) of this AD, re-part mark the yoke attachment pin, in
accordance with Part B of the Accomplishment Instructions of De
Havilland Service Bulletin 84-54-31, Revision B, dated February 21,
2020.
(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 the applicable service information specified
in paragraphs (h)(1) through (3) of this AD.
(1) Bombardier Service Bulletin 84-54-28, Revision A, dated
April 10, 2019.
(2) Bombardier Service Bulletin 84-54-31, dated May 1, 2019.
(3) Bombardier Service Bulletin 84-54-31, Revision A, dated
October 15, 2019.
(i) No Reporting Requirement
Although De Havilland Service Bulletin 84-54-28, Revision B,
dated January 24, 2020; and De Havilland Service Bulletin 84-54-31,
Revision B, dated February 21, 2020; specify to submit certain
information to the manufacturer, this AD does not include that
requirement.
(j) 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 (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.
(k) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2020-51R1, dated February 24, 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-2021-0514.
(2) For more information about this AD, contact Deep Gaurav,
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#50697d3126237d3e2931333f7d333f23103631317e373f26"><span class="__cf_email__" data-cfemail="d6effbb7a0a5fbb8afb7b5b9fbb5b9a596b0b7b7f8b1b9a0">[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#dfabb7bb9fbbbab7bea9b6b3b3beb1bbf1bcb0b2"><span class="__cf_email__" data-cfemail="d8acb0bc98bcbdb0b9aeb1b4b4b9b6bcf6bbb7b5">[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 June 23, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-13726 Filed 6-28-21; 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 June 29, 2021.
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.