6802 Federal Register / Vol. 87, No. 25 / Monday, February 7, 2022 / Proposed Rules 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0217; Project 

Identifier MCAI–2020–01486–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 

certain 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. 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 loose quadrants on the 

rudder pedal torque tube and signs of 

loose rivets or rivet joint wear due to 

inadequate manufacturing tolerances. 

This proposed AD would require 

inspecting the rudder pedal torque tube 

quadrant for looseness and taking 

corrective action as necessary. 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 24, 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–2021–0217; 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; 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–2021–0217; Project Identifier 

MCAI–2020–01486–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– 

45R1, dated April 16, 2021 (referred to 

after this as ‘‘the MCAI’’), to correct an 

unsafe condition for Viking Air Limited 

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, 

serial numbers 001 through 987. The 

MCAI states: 

There have been in-service reports of loose 

quadrants on the rudder pedal torque tube 

and signs of loose rivets or rivet joint wear, 

such as dark areas or streaks around the rivet 

heads and quadrant to torque tube interface. 

Viking Air Ltd. has determined that 

inadequate manufacturing tolerances may 

result in this condition. This defect, if not 

detected and corrected, could result in the 

affected parts deteriorating until the rivets 

fail, leading to loss of control of the rudder 

and possible loss of control of the aeroplane. 

To detect and correct this condition, 

[Transport Canada] AD CF–2020–45 

mandated a one-time detailed inspection of 

the rudder pedal torque tube quadrant 

assembly, and rectification, as required, of 

the affected parts. 

Viking Air Ltd. had published Service 

Bulletin (SB) V6/0067, Revision NC, dated 16 

July 2020, providing Accomplishment 

Instructions for the one-time detailed 

inspection for looseness of the affected parts. 

Since [Transport Canada] AD CF–2020–45 

was issued, Viking Air Ltd. has introduced a 

new rudder pedal torque tube assembly in 

production that is not subject to the unsafe 

condition of this [Transport Canada] AD. As 

a result, Viking Air Ltd. has revised the SB 

V6/0067 at Revision A, dated 26 January 

2021 (referred to as ‘‘the SB’’ in this 

[Transport Canada] AD) to update the 

aeroplane serial number applicability. 

This [Transport Canada] AD revision, CF– 

2020–45R1, is issued to modify the aeroplane 

serial number applicability in accordance 

with the SB. 

You may examine the MCAI in the 

AD docket at https://

www.regulations.gov by searching for 


jspears on DSK121TN23PROD with PROPOSALS1
Federal Register / Vol. 87, No. 25 / Monday, February 7, 2022 / Proposed Rules 6803 

and locating Docket No. FAA–2021– 

0217. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Viking DHC–6 

Twin Otter Service Bulletin V6/0067, 

Revision A, dated January 26, 2021. 

This service information specifies 

procedures for inspecting the rudder 

pedal torque tube quadrant for looseness 

and performing a detailed visual 

inspection of the rudder torque tube 

assembly for signs of loose rivets or rivet 

joint wear. 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 also reviewed Viking DHC– 

6 Twin Otter Service Bulletin V6/0067, 

Revision NC, dated July 16, 2020. This 

service information specifies procedures 

for inspecting the rudder pedal torque 

tube quadrant for looseness and visually 

inspecting for signs of loose or smoking 

rivets. 

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 require 

accomplishing the actions specified in 

the service information already 

described, except as discussed under 

‘‘Differences Between This NPRM and 

the MCAI.’’ 

Differences Between This NPRM 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 Models 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 

estimates the following costs to comply 

with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

airplane 

Cost on U.S. 

operators 

Inspection ............................... 1 work-hour × $85 per hour = $85 ................. Not Applicable ........................ $85 $2,805 

The FAA estimates the following 

costs to replace the rudder pedal torque 

tube quadrant assembly based on the 

results of the proposed inspection. The 

agency has no way of determining the 

number of airplanes that might need 

this replacement: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

airplane 

Rudder pedal torque tube quadrant assembly replacement.10 work-hours × $85 per hour = $850 ......................... $9,256 $10,106 

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 

■ 1. The authority citation for part 39 

continues to read as follows: 


jspears on DSK121TN23PROD with PROPOSALS1
6804 Federal Register / Vol. 87, No. 25 / Monday, February 7, 2022 / Proposed Rules 

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– 

2021–0217; Project Identifier MCAI– 

2020–01486–A. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by March 24, 

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, 

serial numbers 001 through 987, 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 

identifies the unsafe condition as loose 

quadrants on the rudder pedal torque tube 

and signs of loose rivets or rivet joint wear 

due to inadequate manufacturing tolerances. 

The FAA is issuing this AD to detect and 

correct loose rivets or rivet joint wear and 

signs of loose or smoking rivets. The unsafe 

condition, if not addressed, could result in 

the rudder pedal torque tube quadrant 

assembly deteriorating until the rivets fail, 

leading to loss of rudder control with 

consequent loss of airplane control. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Action 

Within 3 months after the effective date of 

this AD, inspect the rudder pedal torque tube 

quadrant assembly for looseness and, if there 

is any looseness of the rudder pedal torque 

tube quadrant assembly, a loose rivet, any 

rivet joint wear, or a smoking rivet, before 

further flight, repair or replace the rudder 

pedal torque tube or quadrant assembly. Do 

these actions by following the 

Accomplishment Instructions, steps A.1. 

through A.9., in Viking DHC–6 Twin Otter 

Service Bulletin No. V6/0067, Revision A, 

dated January 26, 2021, except for any 

requirement to obtain repair instructions 

from Viking Customer Support, the repair 

must be accomplished using a method 

approved by the Manager, New York ACO 

Branch, FAA; Transport Canada; or Viking 

Air Limited’s Transport Canada Design 

Organization Approval (DOA). If approved by 

the DOA, the approval must include the 

DOA-authorized signature. 

(h) Credit for Previous Actions 

You may take credit for the actions 

required by paragraph (g) of this AD if you 

performed those actions before the effective 

date of this AD using Viking DHC–6 Twin 

Otter Service Bulletin V6/0067, Revision NC, 

dated July 16, 2020. 

(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 address 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 Deep Gaurav, Aviation Safety 

Engineer, New York ACO Branch, FAA, 1515 

Stewart Avenue, Westbury, NY 11590; 

phone: (516) 228–7300; email: deep.gaurav@

faa.gov. 

(2) Refer to Transport Canada AD CF– 

2020–45R1, dated April 16, 2021, 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–2021–0217. 

(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 28, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–02413 Filed 2–4–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2022–0030; Airspace 

Docket No. 21–AAL–54] 

RIN 2120–AA66 

Proposed Modification of Class E 

Airspace; Sitka Rocky Gutierrez 

Airport, AK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

modify the Class E airspace, designated 

as a surface area. The Class E2 airspace 

to the northwest of the airport requires 

modification to properly contain 

instrument flight rules (IFR) aircraft 

descending below 1,000 feet above the 

surface of the earth. Additionally, this 

action proposes to remove Class E 

airspace, designated as an extension to 

a Class D or Class E2 surface area. 

Lastly, this action proposes to modify 

Class E airspace extending upward from 

700 feet above the surface of the earth 

at Sitka Rocky Gutierrez Airport, AK. 

This action would ensure the safety and 

management of IFR operations at the 

airport. 

DATES: Comments must be received on 

or before March 24, 2022. 

ADDRESSES: Send comments on this 

proposal to the U.S. Department of 

Transportation, Docket Operations, 1200 

New Jersey Avenue SE, West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590; telephone: 1– 

800–647–5527, or (202) 366–9826. You 

must identify FAA Docket No. FAA– 

2022–0030; Airspace Docket No. 21– 

AAL–54, at the beginning of your 

comments. You may also submit 

comments through the internet at 

https://www.regulations.gov. 

FAA Order JO 7400.11F, Airspace 

Designations and Reporting Points, and 

subsequent amendments can be viewed 

online at https://www.faa.gov/air_

traffic/publications/. For further 

information, you can contact the 

Airspace Policy Group, Federal Aviation 

Administration, 800 Independence 

Avenue SW, Washington, DC 20591; 

telephone: (202) 267–8783. FAA Order 

JO 7400.11F is also available for 

inspection at the National Archives and 

Records Administration (NARA). For 

information on the availability of FAA 

Order JO 7400.11F at NARA, email 

fr.inspection@nara.gov or go to https:// 


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