Rule2022-10758
Airworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier, Inc. and de Havilland, 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
May 19, 2022
Effective
June 23, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is superseding Airworthiness Directive (AD) 89-24-06 R1, which applied 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. AD 89-24-06 R1 required repetitively inspecting the elevator quadrant for damage and taking corrective action as necessary. Since the FAA issued AD 89-24-06 R1, Transport Canada, the aviation authority for Canada, revised its mandatory continuing airworthiness information (MCAI) to correct this unsafe condition on these products. This AD retains the actions required by AD 89-24-06 R1, extends the compliance time intervals for the repetitive inspections, adds Model DHC-6-400 airplanes to the applicability, and adds a fluorescent penetrant inspection requirement. 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 97 (Thursday, May 19, 2022)</title>
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[Federal Register Volume 87, Number 97 (Thursday, May 19, 2022)]
[Rules and Regulations]
[Pages 30405-30408]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-10758]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0099; Project Identifier 2019-CE-019-AD; Amendment
39-22045; AD 2022-10-07]
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: Final rule.
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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 89-24-06
R1, which applied 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. AD 89-24-06 R1 required repetitively inspecting the elevator
quadrant for damage and taking corrective action as necessary. Since
the FAA issued AD 89-24-06 R1, Transport Canada, the aviation authority
for Canada, revised its mandatory continuing airworthiness information
(MCAI) to correct this unsafe condition on these products. This AD
retains the actions required by AD 89-24-06 R1, extends the compliance
time intervals for the repetitive inspections, adds Model DHC-6-400
airplanes to the applicability, and adds a fluorescent penetrant
inspection requirement. The FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective June 23, 2022.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of June 23,
2022.
[[Page 30406]]
ADDRESSES: For service information identified in this final rule,
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#30535f5e44595e45595e571e515942475f424458595e5543437046595b595e575159421e535f5d"><span class="__cf_email__" data-cfemail="33505c5d475a5d465a5d541d525a41445c41475b5a5d56404073455a585a5d54525a411d505c5e">[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. It is also available at
<a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No.
FAA-2022-0099.
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 final rule, the
MCAI, 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: Darren Gassetto, Aviation Safety
Engineer, New York ACO Branch, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: (516) 228-7323; email: <a href="/cdn-cgi/l/email-protection#e1d8cc809792cc8f9880828ecc828e92a1878080cf868e97"><span class="__cf_email__" data-cfemail="390014584f4a145740585a56145a564a795f5858175e564f">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 89-24-06 R1, Amendment 39-6670 (Docket No.
89-CE-29-AD; 55 FR 29347, July 19, 1990) (AD 89-24-06 R1). AD 89-24-06
R1 applied to 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 required
repetitively inspecting the elevator quadrant, part number (P/N) C6CFM
1138-27 (Pre Mod 6/1394), P/N C6CFM 1450-27 (Post Mod 6/1394 or
production cut-in (PCI) serial number (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 replacing if
distortion is found. AD 89-24-06 R1 also required 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. The FAA issued AD 89-24-06 R1 to prevent
failure of the flight control system, which could result in loss of
control of the airplane.
The NPRM published in the Federal Register on February 11, 2022 (87
FR 7965). The NPRM was prompted by Transport Canada AD CF-1972-06R5,
dated June 22, 2018 (referred to after this as ``the MCAI''), issued by
Transport Canada, which is the aviation authority for Canada. 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.
In the NPRM, the FAA proposed to retain the actions of AD 89-24-06
R1, extend the compliance time intervals for the repetitive
inspections, add Model DHC-6-400 airplanes to the applicability, and
add a fluorescent penetrant inspection requirement.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from the Airline Pilots Association,
International, which supported the NPRM without change.
Conclusion
These products have been approved by the aviation authority of
another country and are 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 referenced above. The FAA reviewed the relevant data,
considered the comment received, and determined that air safety
requires adopting the AD as proposed. Accordingly, the FAA is issuing
this AD to address the unsafe condition on these products. This AD is
adopted as proposed in the NPRM.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Viking 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
the ADDRESSES section.
Differences Between This AD and the MCAI
The MCAI addresses actions on the control column lower assembly,
the elevator pulley bracket system, and the elevator quadrant. This AD
only requires actions on the elevator quadrant and elevator quadrant
support bracket. The FAA is not requiring 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 (Docket No. 79-EA-
63; 45 FR 45258, July 3, 1980); and AD 69-8-12 R1, Amendment 39-867
(Docket No. 69-EA-133; 34 FR 18226, November 14, 1969).
Costs of Compliance
The FAA estimates that this AD affects 133 airplanes of U.S.
registry.
The FAA estimates the following costs to comply with this AD:
[[Page 30407]]
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost airplane operators
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Elevator quadrant and support 0.5 work-hour x Not Applicable........ $42.50 per $5,652.50 (for
bracket visual inspection. $85 per hour = inspection cycle. the affected 133
$42.50. airplanes) per
inspection
cycle.
Fluorescent penetrant 1 work-hour x $85 Not Applicable........ $85.............. $10,795 (for the
inspection of the elevator per hour = $85. affected 127
quadrant support 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
inspections. The FAA has no way of determining the number of airplanes
that might need these repairs/replacements:
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 Not Applicable 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 has determined that 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:
0
a. Removing Airworthiness Directive 89-24-06 R1, Amendment 39-6670
(Docket No. 89-CE-29-AD; 55 FR 29347, July 19, 1990); and
0
b. Adding the following new airworthiness directive:
2022-10-07 Viking Air Limited (Type Certificate Previously Held by
Bombardier, Inc. and de Havilland, Inc.): Amendment 39-22045; Docket
No. FAA-2022-0099; Project Identifier 2019-CE-019-AD.
(a) Effective Date
This airworthiness directive (AD) is effective June 23, 2022.
(b) Affected ADs
This AD replaces AD 89-24-06 R1, Amendment 39-6670 (Docket No.
89-CE-29-AD; 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 Viking 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
[[Page 30408]]
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 part number (P/N) C6CFM1138-27 (Pre Mod 6/1394), P/N
C6CFM1450-27 (Post Mod 6/1394 or production cut-in (PCI) serial
number (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 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, New York ACO Branch, FAA, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; phone: (516) 228-7323; email:
<a href="/cdn-cgi/l/email-protection#0c35216d7a7f2162756d6f63216f637f4c6a6d6d226b637a"><span class="__cf_email__" data-cfemail="a29b8fc3d4d18fccdbc3c1cd8fc1cdd1e2c4c3c38cc5cdd4">[email protected]</span></a>.
(2) Refer to Transport Canada AD CF-1972-06R5, dated June 22,
2018, for more information. You may examine the Transport Canada AD
at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket
No. FAA-2022-0099.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference 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 the AD specifies otherwise.
(i) Viking DHC-6 (Twin Otter) Service Bulletin 6-511, Revision
A, dated June 22, 1990.
(ii) [Reserved]
(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#eb8884859f82859e82858cc58a82999c84999f8382858e9898ab9d828082858c8a8299c5888486"><span class="__cf_email__" data-cfemail="05666a6b716c6b706c6b622b646c77726a77716d6c6b60767645736c6e6c6b62646c772b666a68">[email protected]</span></a>; website: <a href="https://www.vikingair.com">https://www.vikingair.com</a>.
(4) 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.
(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#c8aebae6a1a6bbb8adabbca1a7a688a6a9baa9e6afa7be"><span class="__cf_email__" data-cfemail="4e283c6027203d3e2b2d3a2721200e202f3c2f60292138">[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 5, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2022-10758 Filed 5-18-22; 8:45 am]
BILLING CODE 4910-13-P
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