Proposed Rule2022-02888
Airworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
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Published
February 11, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) AD 89-24-06 R1, which applies to all Boeing of Canada, Ltd. and de Havilland (now Viking Air Limited) Model DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes. This AD requires repetitively inspecting the elevator quadrant for damage and taking corrective action as necessary. Since the FAA issued AD 89-24-06 R1, the aviation authority for Canada revised its mandatory continuing airworthiness information (MCAI) to correct this unsafe condition on these products. The MCAI identifies the unsafe condition as damage to the flight control system. This proposed AD would retain the actions of AD 89-24-06 R1, extend the compliance time intervals for the repetitive inspections, add the Model DHC-6-400 airplane to the applicability, and add a fluorescent penetrant inspection requirement. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 87 Issue 29 (Friday, February 11, 2022)</title>
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[Federal Register Volume 87, Number 29 (Friday, February 11, 2022)]
[Proposed Rules]
[Pages 7965-7968]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-02888]
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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.
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Federal Register / Vol. 87, No. 29 / Friday, February 11, 2022 /
Proposed Rules
[[Page 7965]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0099; Project Identifier 2019-CE-019-AD]
RIN 2120-AA64
Airworthiness Directives; Viking Air Limited (Type Certificate
Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) AD
89-24-06 R1, which applies to all Boeing of Canada, Ltd. and de
Havilland (now Viking Air Limited) Model DHC-6-1, DHC-6-100, DHC-6-200,
and DHC-6-300 airplanes. This AD requires repetitively inspecting the
elevator quadrant for damage and taking corrective action as necessary.
Since the FAA issued AD 89-24-06 R1, the aviation authority for Canada
revised its mandatory continuing airworthiness information (MCAI) to
correct this unsafe condition on these products. The MCAI identifies
the unsafe condition as damage to the flight control system. This
proposed AD would retain the actions of AD 89-24-06 R1, extend the
compliance time intervals for the repetitive inspections, add the Model
DHC-6-400 airplane to the applicability, and add a fluorescent
penetrant inspection requirement. 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 March 28,
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 Viking Air
Ltd., 1959 de Havilland Way, Sidney British Columbia, Canada V8L 5V5;
phone: (800) 663-8444; email: <a href="/cdn-cgi/l/email-protection#3c5f53524855524955525b125d554e4b534e48545552594f4f7c4a555755525b5d554e125f5351"><span class="__cf_email__" data-cfemail="593a36372d30372c30373e7738302b2e362b2d3130373c2a2a192f303230373e38302b773a3634">[email protected]</span></a>;
website: <a href="https://www.vikingair.com">https://www.vikingair.com</a>. You may view this service
information at the FAA, Airworthiness Products Section, Operational
Safety Branch, 901 Locust, Kansas City, MO 64106. For information on
the availability of this material at the FAA, call (817) 222-5110.
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-2022-0099; 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, the MCAI,
any comments received, and other information. The street address for
Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Darren Gassetto, Aviation Safety
Engineer, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: (516) 228-7323; email: <a href="/cdn-cgi/l/email-protection#d7eefab6a1a4fab9aeb6b4b8fab4b8a497b1b6b6f9b0b8a1"><span class="__cf_email__" data-cfemail="3d04105c4b4e1053445c5e52105e524e7d5b5c5c135a524b">[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-2022-0099; Project Identifier
2019-CE-019-AD'' 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 proposed AD.
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
Darren Gassetto, Aviation Safety Engineer, FAA, New York ACO Branch,
1600 Stewart Avenue, Suite 410, Westbury, NY 11590. Any commentary that
the FAA receives which is not specifically designated as CBI will be
placed in the public docket for this rulemaking.
Background
The FAA issued AD 89-24-06 R1, Amendment 39-6670 (55 FR 29347, July
19, 1990) (AD 89-24-06 R1) for all Boeing of Canada, Ltd. and de
Havilland (type certificate currently held by Viking Air Limited) Model
DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes. AD 89-24-06 R1
requires repetitively inspecting the elevator quadrant, P/N C6CFM 1138-
27 (Pre Mod 6/1394), P/N C6CFM 1450-27 (Post Mod 6/1394 or production
cut-in (PCI) S/N 331, Pre Mod 6/1678), or P/N C6CFM 1450-29 (Post Mod
6/1678 or PCI S/N 602), for distortion (warping, buckling, and score
marks on the quadrant topside face caused by rubbing against the side
of the cable guard) and
[[Page 7966]]
replacing if distortion is found. AD 89-24-06 R1 also requires
inspecting the elevator quadrant mounting support bracket, P/N C6CFM
1142-1, for cracks if distortion in the elevator quadrant is found and
replacing any cracked P/N C6CFM 1142-1.
Actions Since AD 89-24-06 R1 Was Issued
Since the FAA issued AD 89-24-06 R1, the type certificate holder
for Model DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 airplanes
changed from de Havilland to Viking Air Limited. In 2012, the FAA
issued Viking Air Limited a type certificate for the Model DHC-6-400
airplane as part of the DHC-6 series.
Transport Canada, which is the aviation authority for Canada,
superseded its prior ADs on this unsafe condition and issued Canadian
AD CF-1972-06R5, dated June 22, 2018 (referred to after this as ``the
MCAI''), to require a fluorescent penetrant inspection and expand the
model applicability to include the Viking Air Limited Model DHC-6-400
airplane. The MCAI states:
Damage to the flight control system of DHC-6 aeroplanes was
found during inspection. The damage has been attributed to ground
gusts. The damage included cracks in the base of the lower control
column, cracks and buckles in the elevator/rudder pulley bracket,
and distortion of the elevator quadrant. Damage to the elevator
quadrant may produce abnormal loads on the quadrant support bracket
that damage the bracket.
Damaged flight control components may fail when subjected to
service loads, resulting in loss of control of the aeroplane.
This revision of the [Transport Canada] AD clarifies the
applicability of the corrective actions and endorses Service
Bulletin (SB) 6/511 as a means of accomplishing some of the required
inspections. In corrective action Part III, dye penetrant inspection
has been replaced by fluorescent penetrant inspection.
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-
2022-0099.
Related Service Information Under 1 CFR Part 51
The FAA reviewed DHC-6 (Twin Otter) Service Bulletin 6-511,
Revision A, dated June 22, 1990. This service bulletin specifies
procedures for repetitively inspecting the elevator quadrant for
distortion (warping, buckling, and score marks), performing a one-time
dye penetrant inspection of the elevator quadrant support bracket for
cracks, and taking corrective actions. 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
ADDRESSES.
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 this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI and
service information referenced above. The FAA is issuing this NPRM
after determining 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 retain the actions of AD 89-24-06 R1, extend
the compliance time intervals for the repetitive inspections, add the
Model DHC-6-400 airplane to the applicability, and add a fluorescent
penetrant inspection requirement with credit for the visual inspections
done before the effective date of this proposed AD.
Differences Between This Proposed AD and the MCAI
The MCAI addresses actions on the the control column lower
assembly, the elevator pulley bracket system, and the elevator
quadrant. This proposed AD would only require actions on the elevator
quadrant and elevator quadrant support bracket. The FAA is not
proposing to require the repetitive inspections of the control column
lower sub-assembly, lower horizontal torque tube, and top and bottom
channels of the pulley bracket assembly, and the modifications that
terminate those inspections, because those actions are addressed by AD
69-05-01 R2, Amendment 39-3824 (45 FR 45258, July 3, 1980) and AD 69-
08-12 R1, Amendment 39-867 (34 FR 18226, November 14, 1969).
The MCAI applies to Viking Air Limited Model DHC-6 series 110, DHC-
6 series 210, DHC-6 series 310, and DHC-6 series 320, and this proposed
AD would not because these models do not have an FAA type certificate.
Transport Canada Model DHC-6 series 1, DHC-6 series 100, DHC-6 series
200, DHC-6 series 300, and DHC-6 series 400 airplanes correspond to FAA
Model DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, and DHC-6-400
airplanes, respectively.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 133 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:
Estimated Costs
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Cost on U.S.
Action Labor cost Parts cost Cost per airplane operators
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Elevator quadrant and support .5 work-hour x $85 N/A $42.50 per $5,652.50 (for the
bracket visual inspection. per hour = $42.50. inspection cycle. affected 133
airplanes) per
inspection cycle.
Fluorescent penetrant inspection 1 work-hour x $85 N/A $85................ $10,795 (for the
of the elevator quadrant support per hour = $85. affected 127
bracket. airplanes).
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The FAA estimates the following costs to do any repairs or
replacements that would be required based on the results of the
proposed inspections. The FAA has no way of determining the number of
airplanes that might need these repairs/replacements:
[[Page 7967]]
On-Condition Costs
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Cost per
Action Labor cost Parts cost airplane
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Replacement of elevator quadrant.............. 1.5 work-hours x $85 per hour = $825 $952.50
$127.50.
Fluorescent penetrant inspection of the 1 work-hour x $85 per hour = $85 N/A 85
elevator quadrant support bracket.
Replacement of elevator quadrant support 2 work-hours x $85 per hour = 485 655
bracket. $170.
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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
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 that the 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:
0
a. Removing Airworthiness Directive 89-24-06 R1, Amendment 39-6670 (55
FR 29347, July 19, 1990); and
0
b. Adding the following new airworthiness directive:
Viking Air Limited (Type Certificate previously held by Bombardier
Inc., de Havilland, Inc.): Docket No. FAA-2022-0099; Project
Identifier 2019-CE-019-AD.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by March 28, 2022.
(b) Affected ADs
This AD replaces Airworthiness Directive (AD) 89-24-06 R1,
Amendment 39-6670 (55 FR 29347, July 19, 1990) (AD 89-24-06 R1).
(c) Applicability
This AD applies to Viking Air Limited (type certificate
previously held by Bombardier Inc. and de Havilland, Inc.) Model
DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, and DHC-6-400 airplanes,
all serial numbers, certificated in any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 2700, Flight Control
System.
(e) Unsafe Condition
This AD was prompted by mandatory continuing airworthiness
information (MCAI) originated by an aviation authority of another
country to identify and correct an unsafe condition on an aviation
product. The MCAI describes the unsafe condition as damage to the
flight control system. The FAA is issuing this AD to prevent failure
of the flight control system. The unsafe condition, if not
addressed, could result in loss of control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Elevator Quadrant and Support Brackets: Inspections, Replacements,
and Modifications
(1) Visually inspect the elevator quadrant for indications of
distortion (warping, buckling, or score marks) by following
paragraphs III.A.2.(a) and III.A.2.(b) of the Accomplishment
Instructions in DHC-6 (Twin Otter) Service Bulletin 6-511, Revision
A, dated June 22, 1990 (DHC-6 SB 6-511, Revision A) at the following
applicable compliance times:
(i) For Model DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300
airplanes, before further flight after the effective date of this AD
or within 400 hours time-in-service (TIS) after the last inspection
required by AD 89-24-06 R1, whichever occurs later, and thereafter
at intervals not to exceed 400 hours TIS; or
(ii) For Model DHC-6-400 airplanes, before further flight after
the effective date of this AD and thereafter at intervals not to
exceed 400 hours TIS.
Note 1 to paragraph (g)(1): The elevator quadrant may be
identified as P/N C6CFM1138-27 (Pre Mod 6/1394), P/N C6CFM1450-27
(Post Mod 6/1394 or production cut-in (PCI) S/N 331, Pre Mod 6/
1678), or P/N C6CFM1450-29 (Post Mod 6/1678 or PCI S/N 602), and is
referred to as assembly P/N C6CF1137-1, -3, -5, or -7.
(2) If any indication of distortion is found on the elevator
quadrant during any inspection required by paragraph (g)(1) of this
AD, before further flight, replace the elevator quadrant with a
serviceable part and inspect the elevator quadrant support bracket
assembly for cracks by following paragraphs III.B.1. through
III.B.4.(b) of the Accomplishment Instructions in DHC-6 SB 6-511,
Revision A. This AD requires that you do a fluorescent penetrant
inspection as the type of required dye penetrant inspection. If a
crack is found in the elevator quadrant support bracket, before
further flight, replace with a serviceable part by following
paragraphs III.B.5 through III.B.12 of the Accomplishment
Instructions in DHC-6 SB 6-511, Revision A.
(3) For Model DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300
airplanes: Within 400 hours TIS after the effective date of this AD,
unless already done within the preceding 12 months before the
effective date of this AD, inspect the elevator quadrant support
bracket assembly for cracks by
[[Page 7968]]
following paragraphs III.B.1. through III.B.4.(b) of the
Accomplishment Instructions in DHC-6 SB 6-511, Revision A. This AD
requires that you do a fluorescent penetrant inspection as the type
of required dye penetrant inspection. If a crack is found in the
elevator quadrant support bracket, before further flight, replace
with a serviceable part by following paragraphs III.B.5 through
III.B.12 of the Accomplishment Instructions in DHC-6 SB 6-511,
Revision A.
(h) Credit for Previous Actions
(1) For Model DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300
airplanes: This paragraph provides credit for the inspection
required by paragraph (g)(1) of this AD if you performed the
inspection before the effective date of this AD using paragraph
(a)(1) of AD 89-24-06 R1.
(2) For Model DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300
airplanes: This paragraph provides credit for the fluorescent
penetrant inspection and subsequent replacement of the elevator
quadrant support bracket due to a crack found from the fluorescent
penetrant inspection required by paragraph (g)(2) of this AD if
performed before the effective date of this AD using paragraphs
(a)(3) and (4) of AD 89-24-06 R1.
(i) Alternative Methods of Compliance (AMOCs)
(1) 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 local Flight Standards District
Office, as appropriate. If sending information directly to the
manager of the certification office, send it to the attention of the
person identified in paragraph (j)(1) of this AD.
(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.
(j) Related Information
(1) For more information about this AD, contact Darren Gassetto,
Aviation Safety Engineer, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; phone: (516) 228-7323; email:
<a href="/cdn-cgi/l/email-protection#51687c3027227c3f2830323e7c323e22113730307f363e27"><span class="__cf_email__" data-cfemail="30091d5146431d5e4951535f1d535f43705651511e575f46">[email protected]</span></a>.
(2) Refer to Transport Canada AD Number CF-1972-06R5, dated June
22, 2018, for more information. You may examine the Transport Canada
AD in the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for
and locating Docket No. FAA-2022-0099.
(3) For service information identified in this AD, contact
Viking Air Ltd., 1959 de Havilland Way, Sidney British Columbia,
Canada V8L 5V5; phone: (800) 663-8444; email:
<a href="/cdn-cgi/l/email-protection#13707c7d677a7d667a7d743d727a61647c61677b7a7d76606053657a787a7d74727a613d707c7e"><span class="__cf_email__" data-cfemail="84e7ebeaf0edeaf1edeae3aae5edf6f3ebf6f0ecedeae1f7f7c4f2edefedeae3e5edf6aae7ebe9">[email protected]</span></a>; website: <a href="https://www.vikingair.com">https://www.vikingair.com</a>. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 901
Locust, Kansas City, MO 64106. For information on the availability
of this material at the FAA, call (817) 222-5110.
Dated: Issued on February 4, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2022-02888 Filed 2-10-22; 8:45 am]
BILLING CODE 4910-13-P
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