Rule2022-07477
Airworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
Primary source
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Published
April 8, 2022
Effective
May 13, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Viking Air Limited (type certificate previously held by Bombardier Inc. and de Havilland, Inc.) Model DHC-6-400 airplanes. 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 corrosion of the fuel system components located in the fuel gallery due to inadequate corrosion protection. This AD requires repetitively inspecting the fuel gallery for corrosion, rectifying any deficiencies, and accomplishing modifications to the fuel gallery system. 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 68 (Friday, April 8, 2022)</title>
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[Federal Register Volume 87, Number 68 (Friday, April 8, 2022)]
[Rules and Regulations]
[Pages 20701-20703]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-07477]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0007; Project Identifier 2018-CE-048-AD; Amendment
39-22002; AD 2022-07-14]
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 adopting a new airworthiness directive (AD) for
certain Viking Air Limited (type certificate previously held by
Bombardier Inc. and de Havilland, Inc.) Model DHC-6-400 airplanes. 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 corrosion of the fuel system
components located in the fuel gallery due to inadequate corrosion
protection. This AD requires repetitively inspecting the fuel gallery
for corrosion, rectifying any deficiencies, and accomplishing
modifications to the fuel gallery system. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective May 13, 2022.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of May 13, 2022.
ADDRESSES: For service information identified in this final rule,
contact Viking Air Limited Technical Support, 1959 de Havilland Way,
Sidney, British Columbia, Canada, V8L 5V5; phone: (North America) (800)
663-8444; fax: (250) 656-0673; email: <a href="/cdn-cgi/l/email-protection#4b3f2e28232522282a2765383e3b3b24393f0b3d222022252c2a223965282426"><span class="__cf_email__" data-cfemail="f88c9d9b9096919b9994d68b8d8888978a8cb88e919391969f99918ad69b9795">[email protected]</span></a>;
website: <a href="https://www.vikingair.com/support/service-bulletins">https://www.vikingair.com/support/service-bulletins</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. Service information that is incorporated by reference
is also available at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and
locating Docket No. FAA-2022-0007.
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-2022-0007; 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: Joseph Catanzaro, Aviation Safety
Engineer, New York ACO Branch, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: (516) 228-7366; email:
<a href="/cdn-cgi/l/email-protection#d2b8bda1b7a2bafcb1b3a6b3bca8b3a0bd92b4b3b3fcb5bda4"><span class="__cf_email__" data-cfemail="dbb1b4a8beabb3f5b8baafbab5a1baa9b49bbdbabaf5bcb4ad">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain serial-numbered
Viking Air Limited (type certificate previously held by Bombardier Inc.
and de Havilland, Inc.) Model DHC-6-400 airplanes. The NPRM published
in the Federal Register on January 21, 2022 (87 FR 3238). The NPRM was
prompted by MCAI originated by Transport Canada, which is the aviation
authority for Canada. Transport Canada issued AD CF-2018-07, dated
February 23, 2018 (referred to after this as ``the MCAI''), to address
an unsafe condition on certain serial-numbered Viking Air Limited Model
DHC-6-400 airplanes. The MCAI states:
There have been reports of corrosion affecting components of the
fuel system that are located in the fuel gallery because of
inadequate corrosion protection. This condition affects only
aeroplanes operating on floats.
The effects of corrosion-related damage to fuel system
components have included fuel
[[Page 20702]]
leaks, electrical arcing, loss of fuel boost pump function and
erroneous fuel quantity readings. Inaccurate fuel quantity
indication and loss of fuel boost pump function can lead to fuel
starvation followed by loss of engine power. Electrical arcing in
the fuel gallery and loss of electrical bonding between fuel system
components increases the risk of fire.
The MCAI requires repetitively inspecting the fuel gallery for
corrosion, rectifying any deficiencies, and accomplishing modifications
to the fuel gallery system. 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-2022-0007.
Discussion of Final Airworthiness Directive
Comments
The FAA received one comment on the NPRM from an individual. The
commenter 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 this 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 No. V6/
0044, Revision B, dated September 13, 2021. The service information
specifies incorporating multiple design improvement modifications in
the fuel gallery.
The FAA also reviewed Temporary Revision No. 241, dated July 27,
2021, to the Viking DHC-6 Inspection Requirements Manual, PSM 1-6-7.
Items 15.(1) and 15.(2) of this service information specify rinsing and
inspecting the entire fuel gallery for corrosion; removing corrosion;
reapplying any protective finishes; and removing and replacing any
damaged components. The temporary revision updates the fuel gallery
inspection to include airplanes with a new fuel probe (Modification
(MOD) 6/2395).
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.
Other Related Service Information
The FAA reviewed the following technical bulletins, which contain
instructions for the different modifications to components in the fuel
gallery:
<bullet> Viking DHC-6 Twin Otter Technical Bulletin No. TBV6/00034,
Revision NC, dated October 16, 2013 (MOD 6/2267);
<bullet> Viking DHC-6 Twin Otter Technical Bulletin No. TBV6/00084,
Revision A, dated May 26, 2017 (MOD 6/2299);
<bullet> Viking DHC-6 Twin Otter Technical Bulletin No. V6/00099,
Revision NC, dated December 23, 2016 (MOD 6/2389);
<bullet> Viking DHC-6 Twin Otter Technical Bulletin No. TBV6/00094,
Revision NC, dated November 1, 2016 (MOD 6/2390);
<bullet> Viking DHC-6 Twin Otter Technical Bulletin No. V6/00100,
Revision NC, dated February 20, 2017 (MOD 6/2393); and
<bullet> Viking DHC-6 Twin Otter Technical Bulletin No. V6/00152,
Revision NC, dated January 29, 2021 (MOD 6/2464).
Costs of Compliance
The FAA estimates that this AD affects 4 airplanes of U.S.
registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
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Cost on U.S.
Action Labor cost Parts cost Cost per airplane operators
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Inspect fuel gallery........... 3 work-hours x Not applicable........ $255 per $1,020 per
$85 per hour = inspection cycle. inspection
$255. cycle.
MOD 6/2267--Fuel boost pump EMI 16 work-hours x $4,762................ $6,122........... $12,244 (for 2
filter relocation. $85 per hour = affected
$1,360. airplanes).
MOD 6/2299--Improved fuel boost 17 work-hours x $42,290............... $43,735.......... $131,205 (for 3
pump. $85 per hour = affected
$1,445. airplanes).
MOD 6/2389--Electrical Bonding 18 work-hours x $572.................. $2,102........... $8,408 (for 4
Fuel System Manifold Drain $85 per hour = affected
Valve. $1,530. airplanes).
MOD 6/2390--Fuel probe, 20 work-hours x $2,129................ $3,829........... $11,487 (for 3
improved mating electrical $85 per hour = affected
connection. $1,700. airplanes).
MOD 6/2393--Fuel system 8 work-hours x $225.................. $905............. $3,620 (for 4
manifold--drain valve. $85 per hour = affected
$680. airplanes).
MOD 6/2464--Fuel pressure 10 work-hours x $3,953................ $4,803........... $14,409 (for 3
switch replacement. $85 per hour = affected
$850. airplanes).
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On-Condition Costs
The extent of corrosion damage found during the inspections may
vary significantly from airplane to airplane. The FAA has no way of
determining how much corrosion damage may be found on each airplane,
the cost for repairing corrosion damage on each airplane, or the number
of airplanes that may require repair.
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.
[[Page 20703]]
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 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:
2022-07-14 Viking Air Limited (Type Certificate Previously Held by
Bombardier Inc. and de Havilland, Inc.): Amendment 39-22002; Docket
No. FAA-2022-0007; Project Identifier 2018-CE-048-AD.
(a) Effective Date
This airworthiness directive (AD) is effective May 13, 2022.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Viking Air Limited (type certificate
previously held by Bombardier Inc. and de Havilland, Inc.) Model
DHC-6-400 airplanes, serial numbers 845 through 957, certificated in
any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 2800, Aircraft Fuel
System.
(e) Reason
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 corrosion of
fuel system components located in the fuel gallery due to inadequate
corrosion protection. The FAA is issuing this AD to prevent
corrosion-related damage to fuel system components, which could lead
to fuel leaks, electrical arcing, loss of fuel boost pump function,
and erroneous fuel quantity readings. This unsafe condition, if not
corrected, could result in fuel starvation with loss of engine power
and increased risk of an in-flight fire with consequent loss of
airplane control.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions for Airplanes Operating on Floats on the Effective
Date of This AD
(1) Within 50 hours time-in-service (TIS) after the effective
date of this AD or within 3 months after the effective date of this
AD, whichever occurs first, and thereafter at intervals not to
exceed 125 hours TIS, do the following actions:
(i) Remove all fuel gallery covers and rinse the fuel gallery
with water.
(ii) Inspect the fuel gallery for corrosion and, if there is any
corrosion, take all necessary corrective actions before further
flight by following Item D.15(2) of Special Inspection 3 in
Temporary Revision No. 241, dated July 27, 2021, to the Viking DHC-6
Inspection Requirements Manual, PSM 1-6-7.
(2) Within 12 months after the effective date of this AD,
install the modifications applicable to your airplane serial number
by following the Accomplishment Instructions, sections A. through
E., in Viking DHC-6 Twin Otter Service Bulletin No. V6/0044,
Revision B, dated September 13, 2021 (Viking SB V6/0044, Revision
B).
(h) Required Actions for Airplanes Modified To Operate on Floats After
the Effective Date of This AD
Within 12 months after the airplane is modified to operate on
floats, regardless of whether the landing gear is later modified
back to non-float landing gear, install the modifications applicable
to your airplane serial number by following the Accomplishment
Instructions, sections A. through E., in Viking SB V6/0044, Revision
B.
(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 Joseph
Catanzaro, Aviation Safety Engineer, New York ACO Branch, FAA, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (516) 228-
7366; email: <a href="/cdn-cgi/l/email-protection#62080d1107120a4c010316030c1803100d220403034c050d14"><span class="__cf_email__" data-cfemail="741e1b0711041c5a171500151a0e15061b341215155a131b02">[email protected]</span></a>.
(2) Refer to Transport Canada AD CF-2018-07, dated February 23,
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-2022-0007.
(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 No. V6/0044,
Revision B, dated September 13, 2021.
(ii) Temporary Revision No. 241, dated July 27, 2021, to the
Viking DHC-6 Inspection Requirements Manual, PSM 1-6-7.
(3) For service information identified in this AD, contact
Viking Air Limited Technical Support, 1959 de Havilland Way, Sidney,
British Columbia, Canada, V8L 5V5; phone: (North America) (800) 663-
8444; fax: (250) 656-0673; email: <a href="/cdn-cgi/l/email-protection#3a4e5f59525453595b5614494f4a4a55484e7a4c535153545d5b534814595557"><span class="__cf_email__" data-cfemail="d1a5b4b2b9bfb8b2b0bdffa2a4a1a1bea3a591a7b8bab8bfb6b0b8a3ffb2bebc">[email protected]</span></a>;
website: <a href="https://www.vikingair.com/support/service-bulletins">https://www.vikingair.com/support/service-bulletins</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#9afce8b4f3f4e9eafff9eef3f5f4daf4fbe8fbb4fdf5ec"><span class="__cf_email__" data-cfemail="6f091d4106011c1f0a0c1b0600012f010e1d0e41080019">[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 March 25, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2022-07477 Filed 4-7-22; 8:45 am]
BILLING CODE 4910-13-P
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