3236 Federal Register / Vol. 87, No. 14 / Friday, January 21, 2022 / Proposed Rules 

Signing Authority 

This document of the Department of 

Energy was signed on January 12, 2022, 

by Kelly J. Speakes-Backman, Principal 

Deputy Assistant Secretary for Energy 

Efficiency and Renewable Energy, 

pursuant to delegated authority from the 

Secretary of Energy. That document 

with the original signature and date is 

maintained by DOE. For administrative 

purposes only, and in compliance with 

requirements of the Office of the Federal 

Register, the undersigned DOE Federal 

Register Liaison Officer has been 

authorized to sign and submit the 

document in electronic format for 

publication, as an official document of 

the Department of Energy. This 

administrative process in no way alters 

the legal effect of this document upon 

publication in the Federal Register. 

Signed in Washington, DC, on January 12, 

2022. 

Treena V. Garrett, 

Federal Register Liaison Officer, U.S. 

Department of Energy. 

[FR Doc. 2022–00848 Filed 1–20–22; 8:45 am] 

BILLING CODE 6450–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1003; Project 

Identifier MCAI–2020–00962–A] 

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). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for all 

Viking Air Limited (Viking) (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. This proposed AD results 

from 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 identifies the unsafe 

condition as cracks and corrosion 

damage to the aileron internal structure. 

This proposed AD would require 

visually inspecting the entire aileron 

internal structure, correcting any 

damage found, and reporting the 

inspection results to Viking. 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 7, 2022. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

https://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: (202) 493–2251. 

• 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. 

• 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: 

continuing.airworthiness@

vikingair.com; website: https://

www.vikingair.com. 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 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–1003; 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: 

Deep Gaurav, Aviation Safety Engineer, 

New York ACO Branch, FAA, 1515 

Stewart Avenue, Westbury, NY 11590; 

phone: (516) 228–7300; fax: (516) 794– 

5331; email: deep.gaurav@faa.gov. 

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–2020–1003; Project Identifier 

MCAI–2020–00962–A’’ 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 this 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 https://

www.regulations.gov, 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, Aviation 

Safety Engineer, New York ACO Branch, 

FAA, 1515 Stewart Avenue, 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 

Transport Canada, which is the 

aviation authority for Canada, has 

issued Transport Canada AD CF–2020– 

05, dated March 13, 2020 (referred to 

after this as ‘‘the MCAI’’), to address the 

unsafe condition on Viking Model 

DHC–6 series 1, DHC–6 series 100, 

DHC–6 series 110, DHC–6 series 200, 

DHC–6 series 210, DHC–6 series 300, 

DHC–6 series 310, DHC–6 series 320, 

and DHC–6 series 400 airplanes. The 

MCAI states: 

Viking Air Ltd. (Viking) received reports of 

cracks and corrosion damage to the aileron 

internal structure. During a repair of an inservice aeroplane, an aileron hinge support 

rib was found cracked at the lower flange 

along the bend radius near the hinge fitting 

attachment at wing station 247.29. 

Preliminary investigation by Viking 


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Federal Register / Vol. 87, No. 14 / Friday, January 21, 2022 / Proposed Rules 3237 

determined that the observed crack was the 

result of fatigue. During an inspection of 

another in-service aeroplane, the aileron 

inboard rib and the vertical flange of the 

inboard aileron forward spar near a fastener 

hole were also found cracked. 

The current inspection requirements of the 

affected aeroplanes do not include a direct 

inspection of the aileron internal structure. 

Cracks or other damage to the aileron ribs or 

to the aileron spar flanges are not detectable 

from the aileron exterior surfaces. 

Undetected cracks or other damage to the 

aileron internal structure could lead to 

progressive looseness of the aileron at the 

hinge support rib push-pull rod attachment 

and subsequent flutter condition and 

degraded or loss of aileron control. 

To detect and correct any cracking or other 

damage to the aileron internal structure, this 

[Transport Canada] AD mandates a one-time 

Special Detailed Inspection (SDI) of all 

aileron internal structure, including front and 

rear spars, all aileron ribs and upper and 

lower skins for cracks, corrosion or other 

damage, and rectification, as required, of the 

damaged parts. 

This [Transport Canada] AD also mandates 

reporting of all inspection results to Viking. 

The reporting of the inspection results is 

necessary to assess the overall aileron 

internal structural condition on in-service 

aeroplanes and to determine additional 

corrective action based on the results of the 

inspections. 

Viking has published Service Bulletin (SB) 

V6/0066 Revision A, dated 9 December 2019, 

(referred to as ‘‘the SB’’ in this AD) providing 

accomplishment instructions for the 

inspection, rectification of the damaged 

parts, and reporting requirements. 

You may examine the MCAI in the 

AD docket at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

1003. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Viking DHC–6 

Twin Otter Service Bulletin V6/0066, 

Revision A, dated December 9, 2019. 

The service information specifies 

procedures for visually inspecting the 

entire aileron internal structure, 

including front and rear spars, all 

aileron ribs, and upper and lower skins; 

repairing or replacing any damaged part; 

and reporting inspection results to 

Viking Air Limited technical support. 

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 Viking DHC–6 

Twin Otter Service Bulletin V6/0066, 

Revision NC, dated August 29, 2019. 

The service information specifies 

procedures for visually inspecting the 

aileron ribs, including ribs and both 

sides of the hinge arm; repairing or 

replacing any damaged part; and 

reporting inspection results to Viking 

Air Limited technical support. 

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 

in 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 described 

previously. 

Interim Action 

The FAA considers that this proposed 

AD would be an interim action. The 

inspection reports will provide the FAA 

and Viking Air Limited additional data 

for determining the damage present in 

the fleet. After analyzing the data, the 

FAA may take further rulemaking 

action. 

Differences Between This Proposed AD 

and the MCAI 

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 33 

airplanes of U.S. registry. The FAA also 

estimates that it would take about 3 

work-hours per airplane to comply with 

the inspection and 1 hour to comply 

with the reporting requirement of this 

proposed AD. The average labor rate is 

$85 per work-hour. 

Based on these figures, the FAA 

estimates the cost of the proposed AD 

on U.S. operators would be $11,220 or 

$340 per airplane. 

In addition, the FAA estimates that 

any necessary follow-on actions to 

replace an aileron would take 6 workhours and require parts costing $52,243, 

for a cost of $52,753 per airplane. The 

FAA has no way of determining the 

number of airplanes that may need these 

actions. 

Paperwork Reduction Act 

A federal agency may not conduct or 

sponsor, and a person is not required to 

respond to, nor shall a person be subject 

to a penalty for failure to comply with 

a collection of information subject to the 

requirements of the Paperwork 

Reduction Act unless that collection of 

information displays a currently valid 

OMB Control Number. The OMB 

Control Number for this information 

collection is 2120–0056. Public 

reporting for this collection of 

information is estimated to take 

approximately 1 hour per response, 

including the time for reviewing 

instructions, searching existing data 

sources, gathering and maintaining the 

data needed, and completing and 

reviewing the collection of information. 

All responses to this collection of 

information are mandatory. Send 

comments regarding this burden 

estimate or any other aspect of this 

collection of information, including 

suggestions for reducing this burden to: 

Information Collection Clearance 

Officer, Federal Aviation 

Administration, 10101 Hillwood 

Parkway, Fort Worth, TX 76177–1524. 

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 


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3238 Federal Register / Vol. 87, No. 14 / Friday, January 21, 2022 / Proposed Rules 

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) 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 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 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive: 

Viking Air Limited (Type Certificate 

Previously Held by Bombardier Inc. and 

de Havilland, Inc.): Docket No. FAA– 

2020–1003; Project Identifier MCAI– 

2020–00962–A. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by March 7, 

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–6–1, 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 5700, Wing Structure. 

(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 

identifies the unsafe condition as cracks and 

corrosion damage to the aileron internal 

structure. The FAA is issuing this AD to 

detect and correct cracks and other damage 

to the aileron internal structure. The unsafe 

condition, if not addressed, could result in 

progressive looseness of the aileron at the 

hinge support rib push-pull rod attachment, 

flutter condition, and degraded or loss of 

aileron control, which could lead to loss of 

control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection and Replacement of the 

Aileron 

At the compliance time specified in 

paragraph (g)(1) or (2) of this AD, inspect the 

left-hand (LH) and right-hand (RH) aileron 

internal structures for cracks, corrosion, and 

other damage and take any necessary 

corrective actions in accordance with the 

Accomplishment Instructions, steps II.A. 

through II.A.3. of Viking DHC–6 Twin Otter 

Service Bulletin V6/0066, Revision A, dated 

December 9, 2019 (Viking SB V6/0066, 

Revision A). 

(1) For each LH or RH aileron that has 

accumulated 16,000 or more hours time-inservice (TIS), 32,000 or more flight cycles 

(FC), or 10 or more years since first 

installation on an airplane, whichever occurs 

first: Within 6 months after the effective date 

of this AD. 

(2) For each LH or RH aileron that has 

accumulated less than 16,000 hours TIS, less 

than 32,000 FC, and less than 10 years since 

first installation on an airplane: Within 6 

months after accumulating 16,000 hours TIS, 

32,000 FC, or 10 years, whichever occurs 

first. 

(h) Reporting Requirement 

Within 30 days after the inspection 

required by paragraph (g)(1) or (2) of this AD 

or within 30 days after the effective date of 

this AD, whichever occurs later, report to 

Viking the information requested on the 

Inspection Reply Form, page 7, of Viking SB 

V6/0066, Revision A. 

(i) Credit for Previous Actions 

You may take credit for the actions 

required by paragraphs (g)(1) and (2) of this 

AD if you performed those actions before the 

effective date of this AD using Viking DHC– 

6 Twin Otter Service Bulletin V6/0066, 

Revision NC, dated August 29, 2019. 

(j) 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 (k)(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. 

(k) Related Information 

(1) For more information about this AD, 

contact Deep Gaurav, Aviation Safety 

Engineer, New York ACO Branch, FAA, 1515 

Stewart Avenue, Westbury, NY 11590; 

phone: (516) 228–7300; fax: (516) 794–5331; 

email: deep.gaurav@faa.gov. 

(2) Refer to Transport Canada AD CF– 

2020–05, dated March 13, 2020, for more 

information. You may examine the Transport 

Canada AD in the AD docket at https://

www.regulations.gov by searching for and 

locating Docket No. FAA–2020–1003. 

(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: continuing.airworthiness@

vikingair.com; website: https://

www.vikingair.com. You may review this 

referenced 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. 

Issued on January 13, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–00994 Filed 1–20–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0007; Project 

Identifier 2018–CE–048–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). 

SUMMARY: The FAA proposes to adopt 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 

proposed AD results from 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 


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