Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 16661 

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: 

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: 

International Aero Engines, LLC: Docket No. 

FAA–2022–0292; Project Identifier AD– 

2021–01297–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 9, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to International Aero 

Engines, LLC PW1122G–JM, PW1124G1–JM, 

PW1124G–JM, PW1127G1–JM, PW1127GA– 

JM, PW1127G–JM, PW1129G–JM, PW1130G– 

JM, PW1133GA–JM, and PW1133G–JM 

model turbofan engines with engine serial 

numbers P770101 through P772647. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by an analysis of 

an event involving an International Aero 

Engines AG V2533–A5 model turbofan 

engine, which experienced an uncontained 

failure of a high-pressure turbine (HPT) 1ststage disk that resulted in high-energy debris 

penetrating the engine cowling. The FAA is 

issuing this AD to prevent failure of the HPT 

1st-stage disk and HPT 2nd-stage disk. The 

unsafe condition, if not addressed, could 

result in uncontained HPT disk failure, 

release of high-energy debris, damage to the 

engine, damage to the airplane, and loss of 

the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For affected engines that have not 

incorporated Pratt & Whitney (PW) Service 

Bulletin (SB) PW1000G–C–72–00–0112– 

00A–930A–D, Issue No: 005, dated July 22, 

2021 (PW SB PW1000G–C–72–00–0112– 

00A–930A–D), at the next engine shop visit 

after the effective date of this AD, perform 

the following: 

(i) Ultrasonic inspection (USI) of the HPT 

1st-stage disk using the Accomplishment 

Instructions, paragraph 9.A. or B., as 

applicable, of PW SB PW1000G–C–72–00– 

0188–00A–930A–D, Issue No: 001, dated 

September 13, 2021 (PW SB PW1000G–C– 

72–00–0188–00A–930A–D); and 

(ii) USI of the HPT 2nd-stage disk using the 

Accomplishment Instructions, paragraph 9.C. 

or D., as applicable, of PW SB PW1000G–C– 

72–00–0188–00A–930A–D. 

(2) For affected engines that have 

incorporated PW SB PW1000G–C–72–00– 

0112–00A–930A–D, with an installed HPT 

1st-stage disk having a serial number (S/N) 

identified in the Accomplishment 

Instructions, Table 2., of PW SB PW1000G– 

C–72–00–0188–00A–930A–D, at the next 

engine shop visit after the effective date of 

this AD, perform a USI of the HPT 1st-stage 

disk using the Accomplishment Instructions, 

paragraph 9.A. or B., as applicable, of PW SB 

PW1000G–C–72–00–0188–00A–930A–D. 

(3) For affected engines that have 

incorporated PW SB PW1000G–C–72–00– 

0112–00A–930A–D, with an installed HPT 

2nd-stage disk having an S/N identified in 

the Accomplishment Instructions, Table 3., 

of PW SB PW1000G–C–72–00–0188–00A– 

930A–D, at the next engine shop visit after 

the effective date of this AD, perform a USI 

of the HPT 2nd-stage disk using the 

Accomplishment Instructions, paragraph 9.C. 

or D., of PW SB PW1000G–C–72–00–0188– 

00A–930A–D. 

(4) Based on the results of the USIs 

required by paragraphs (g)(1) through (3) of 

this AD, if any HPT 1st-stage disk or HPT 

2nd-stage disk does not pass the USI, as 

specified in the Accomplishment 

Instructions, paragraphs 9.A. through D., of 

PW SB PW1000G–C–72–00–0188–00A– 

930A–D, as applicable, before further flight, 

remove the HPT 1st-stage disk or HPT 2ndstage disk from service and replace with a 

part eligible for installation. 

Note 1 to paragraph (g): For affected 

engines that have incorporated PW SB 

PW1000G–C–72–00–0112–00A–930A–D and 

do not require an inspection per paragraph 

(g)(2) or (3) of this AD, no further action is 

required. 

(h) Definitions 

(1) For the purpose of this AD, a ‘‘part 

eligible for installation’’ is: 

(i) Any HPT 1st-stage disk that passed the 

USI required by paragraphs (g)(1)(i) and (g)(2) 

of this AD. 

(ii) Any HPT 2nd-stage disk that passed the 

USI required by paragraphs (g)(1)(ii) and 

(g)(3) of this AD. 

(2) For the purpose for this AD, an ‘‘engine 

shop visit’’ is the induction of an engine into 

the shop for maintenance involving the 

separation of the ‘‘M’’ flange. Separation of 

the ‘‘M’’ flange solely for the purposes of 

transportation without subsequent engine 

maintenance does not constitute an engine 

shop visit. 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, ECO 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 and 

email to: ANE-AD-AMOC@faa.gov. 

(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 Mark Taylor, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7229; email: Mark.Taylor@faa.gov. 

(2) For service information identified in 

this AD, contact International Aero Engines, 

LLC, 400 Main Street, East Hartford, CT 

06118; phone: (860) 690–9667; email: 

help24@pw.utc.com; website: http://fleetcare.

prattwhitney.com. You may view this 

referenced service information at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 1200 District Avenue, 

Burlington, MA 01803. For information on 

the availability of this material at the FAA, 

call (817) 222–5110. 

Issued on March 18, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–06211 Filed 3–23–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0287; Project 

Identifier MCAI–2020–01602–T] 

RIN 2120–AA64 

Airworthiness Directives; De Havilland 

Aircraft of Canada Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 


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16662 Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain De Havilland Aircraft of Canada 

Limited Model DHC–8–400 series 

airplanes. This proposed AD was 

prompted by reports of broken P-clamps 

on the pressure relief line and the 

motive flow line in the fuel tanks, and 

a subsequent determination that certain 

service information lacked instructions 

for maintaining appropriate clearance 

between certain fuel tubes and their 

support brackets, and may also have led 

to incorrect installation of certain 

TeflonTM sleeves. This proposed AD 

was also prompted by a determination 

that new or more restrictive 

airworthiness limitations are necessary. 

This proposed AD would require 

inspecting the motive flow line, vent 

line, and related parts, and adding 

support or additional clearance if 

necessary. This proposed AD would 

also require inspection, and 

replacement or relocation if necessary, 

of affected TeflonTM sleeves on the vent 

line, and installation of TeflonTM

sleeves on the vent line at additional 

wing stations. This proposed AD would 

also require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations. 

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 May 9, 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 De Havilland 

Aircraft of Canada Limited, Q-Series 

Technical Help Desk, 123 Garratt 

Boulevard, Toronto, Ontario M3K 1Y5, 

Canada; telephone 416–375–4000; fax 

416–375–4539; email thd@

dehavilland.com; internet https://

dehavilland.com. You may view this 

service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0287; 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, any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Joseph Catanzaro, Aerospace Engineer, 

Airframe and Propulsion Section, FAA, 

New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 

11590; telephone 516–228–7366; email 

9-avs-nyaco-cos@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–2022–0287; Project Identifier 

MCAI–2020–01602–T’’ 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 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 Joseph Catanzaro, 

Aerospace Engineer, Airframe and 

Propulsion Section, FAA, New York 

ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7366; email 9-avsnyaco-cos@faa.gov. 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 Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued TCCA AD CF– 

2017–05R2, dated September 20, 2019 

(CF–2017–05R2) (also referred to after 

this as the Mandatory Continuing 

Airworthiness Information, or the 

MCAI), to correct an unsafe condition 

for certain De Havilland Aircraft of 

Canada Limited Model DHC–8–400, 

–401, and –402 airplanes. You may 

examine the MCAI in the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0287. 

This proposed AD was prompted by 

reports of broken P-clamps on the 

pressure relief line and the motive fuel 

line in the fuel tanks, as well as fouling 

conditions between the motive flow line 

and the collector tank partition wall in 

both fuel tanks. Later, certain service 

information designed to mitigate these 

issues was found to not contain 

instructions to support the motive flow 

line and vent line at wing stations 

–371.019 and 371.019 in the fuel tanks 

or to maintain appropriate clearance 

between the fuel tubes and their support 

brackets at wing stations –371.019 and 

–209.109 in the left-hand fuel tank and 

wing stations 371.019 and 209.019 in 

the right-hand fuel tank. Bombardier 

issued Modification Summaries 

(ModSums) to provide instructions for 

addressing the initial reports of 

inadequate clearance. Bombardier later 

issued revised service information to 

address this inadequate support and 

clearance on all affected airplanes. 

Subsequently, the manufacturer 

determined that certain service 

information was missing instructions to 

relocate certain TeflonTM sleeves and 

certain other service information may 

have caused TeflonTM sleeves to be 

incorrectly installed on the vent line. 

The FAA is proposing this AD to 

address adverse impacts on the integrity 

of the electrical bonding paths 

throughout the fuel line, which could 

lead to arcing between the vent line and 

airplane structure, and could result in 


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Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 16663 

possible fuel tank ignition in the event 

of a lightning strike. 

See the MCAI for additional 

background information. 

Related Service Information Under 1 

CFR Part 51 

De Havilland Aircraft of Canada 

Limited has issued the following 

Bombardier service information. 

• Bombardier Service Bulletin 84–28– 

18, Revision B, dated April 20, 2017, 

which describes procedures for 

increasing the hole size in the collector 

tank partition wall, inspecting the 

motive flow line for damage, and 

replacing the associated grommet and 

motive flow line. 

• Bombardier Service Bulletin 84–28– 

19, Revision D, dated February 16, 2018, 

which describes procedures for 

replacing the affected single nut plate 

brackets and standoffs at the affected 

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

stations on the motive flow line and 

pressure relief line; inspecting the 

motive flow line and vent line at certain 

wing stations in the fuel tanks to ensure 

that these fuel tubes are adequately 

supported; and inspecting the fuel tubes 

to verify that an appropriate clearance 

has been maintained between the fuel 

tubes and their support brackets. 

• Bombardier Service Bulletin 84–28– 

24, dated November 27, 2017, which 

describes procedures for installing 

TeflonTM sleeves on the vent line at the 

specified wing stations in the LH and 

RH fuel tanks, inspecting the TeflonTM

sleeve installation on the vent line at 

those wing stations in the LH and RH 

fuel tanks, and repositioning the 

TeflonTM sleeves. 

• Bombardier Service Bulletin 84–28– 

25, dated November 27, 2017, which 

describes procedures for inspecting the 

TeflonTM sleeve installation on the vent 

line in the LH and RH fuel tanks for 

correct installation and damage, and 

replacing and repositioning the 

TeflonTM sleeves. 

De Havilland Aircraft of Canada 

Limited has also issued the following 

Bombardier service information, which 

describes procedures for replacing the 

affected single nut plate brackets and 

standoffs on the motive flow line and 

vent line at LH and RH wing stations. 

These documents are distinct since they 

apply to different airplane 

configurations. 

• Bombardier Repair Drawing 8/4– 

28–018, Issue 1, dated October 30, 2017. 

• Bombardier Repair Drawing 8/4– 

28–018, Issue 2, dated June 12, 2018. 

• Bombardier Repair Drawing 8/4– 

28–018, Issue 3, dated June 21, 2018. 

• Bombardier Repair Drawing 8/4– 

28–018, Issue 4, dated July 27, 2018. 

De Havilland Aircraft of Canada 

Limited has also issued the following 

Bombardier service information, which 

describes fuel systems limitations. 

These documents are distinct because 

they apply to different airplane 

configurations. 

• (Bombardier) Q400 Dash 8 

Temporary Revision (TR) ALI–0192, 

dated April 24, 2018, to Section 4—28 

Fuel System Limitation, of Part 2, of the 

Bombardier Q400 Dash 8 Maintenance 

Requirements Manual (MRM), PSM 1– 

84–7. 

• (Bombardier) Q400 Dash 8 TR ALI– 

0193, dated April 24, 2018, to Section 

5—00 Critical Design Configuration 

Control Limitations, of the Bombardier 

Q400 Dash 8 MRM, PSM 1–84–7. 

De Havilland Aircraft of Canada 

Limited has also issued the following 

Bombardier service information, which 

describes new or more restrictive 

airworthiness limitations for fuel tank 

systems. These documents are distinct 

because they apply to different airplane 

configurations. 

• (Bombardier) Q400 Dash 8 Airplane 

Maintenance Manual (AMM) TR 28– 

145, dated November 21, 2017. 

• (Bombardier) Q400 Dash 8 AMM 

TR 28–146, dated November 21, 2017. 

• (Bombardier) Q400 Dash 8 AMM 

TR 28–147, dated November 21, 2017. 

• (Bombardier) Q400 Dash 8 AMM 

TR 28–148, dated November 24, 2017. 

• (Bombardier) Q400 Dash 8 AMM 

TR 28–149, dated November 27, 2017. 

• (Bombardier) Q400 Dash 8 

Maintenance Task Card Manual 

(MTCM) Maintenance Task Card 000– 

28–520–704 (Config A01), Detailed 

Inspection of the TeflonTM Sleeve on the 

Fuel Tank Vent Line (LH), Revision 42, 

Amendment 0002, dated November 21, 

2017. 

• (Bombardier) Q400 Dash 8 MTCM 

Maintenance Task Card 000–28–620– 

704 (Config A01), Detailed Inspection of 

the TeflonTM Sleeve on the Fuel Tank 

Vent Line (RH), Revision 42, 

Amendment 0002, dated November 21, 

2017. 

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. 

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 the State 

of Design Authority, the FAA has been 

notified of the unsafe condition 

described in the MCAI and service 

information referenced above. The FAA 

is proposing this AD because the FAA 

evaluated all the relevant information 

and determined 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. This proposed AD would 

allow using Bombardier Repair Drawing 

8/4–28–018 as a method of compliance 

for the actions required by paragraph 

(h)(2) of this proposed AD, provided the 

replacement of the affected single nut 

plate brackets and standoffs on the 

motive flow line, vent line, pressure 

relief line, and scavenge line at LH and 

RH wing stations Yw ± 209.019, Yw ± 

317.019, and Yw ± 371.019, is also 

done. 

This proposed AD would also require 

revising the existing maintenance or 

inspection program, as applicable, to 

incorporate new or more restrictive 

airworthiness limitations for fuel tank 

systems. 

This proposed AD would require 

revisions to certain operator 

maintenance documents to include new 

actions (e.g., inspections) and Critical 

Design Configuration Control 

Limitations (CDCCLs). Compliance with 

these actions and CDCCLs is required by 

14 CFR 91.403(c). For airplanes that 

have been previously modified, altered, 

or repaired in the areas addressed by 

this proposed AD, the operator may not 

be able to accomplish the actions 

described in the revisions. In this 

situation, to comply with 14 CFR 

91.403(c), the operator must request 

approval for an alternative method of 

compliance according to paragraph 

(n)(1) of this proposed AD. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 52 

airplanes of U.S. registry. The FAA 

estimates the following costs to comply 

with this proposed AD: 


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16664 Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 

ESTIMATED COSTS FOR REQUIRED ACTIONS * 

Labor cost Parts cost Cost per product Cost on 

U.S. operators 

Up to 93 work-hours × $85 per hour = Up to $7,905 ..... Up to $7,862 ...................... Up to $15,767 .................... Up to $819,884. 

* Table does not include estimated costs for revising the maintenance or inspection program. 

The FAA has determined that revising 

the maintenance or inspection program 

takes an average of 90 work-hours per 

operator, although the FAA recognizes 

that this number may vary from operator 

to operator. In the past, the FAA has 

estimated that this action takes 1 workhour per airplane. Since operators 

incorporate maintenance or inspection 

program changes for their affected 

fleet(s), the FAA has determined that a 

per-operator estimate is more accurate 

than a per-airplane estimate. Therefore, 

the FAA estimates the total cost per 

operator to be $7,650 (90 work-hours × 

$85 per work-hour). 

The FAA has received no definitive 

data on which to base the cost estimates 

for the on-condition actions specified in 

this proposed AD. 

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: 

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: 

De Havilland Aircraft of Canada Limited 

(Type Certificate Previously Held by 

Bombardier, Inc.): Docket No. FAA–2022– 

0287; Project Identifier MCAI–2020– 

01602–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 9, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to De Havilland Aircraft 

of Canada Limited (type certificate 

previously held by Bombardier, Inc.) Model 

DHC–8–400, –401, and –402 airplanes, 

certificated in any category, serial numbers 

(S/Ns) 4001, 4003, and subsequent. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 28, Fuel System; and 05, Time 

Limits/Maintenance Checks. 

(e) Unsafe Condition 

This AD was prompted by reports of 

broken P-clamps on the pressure relief line 

and the motive flow line in the fuel tanks, 

and a subsequent determination that certain 

service information lacked instructions for 

maintaining appropriate clearance between 

certain fuel tubes and their support brackets, 

and may also have led to incorrect 

installation of certain TeflonTM sleeves. The 

FAA is issuing this AD to address adverse 

impacts on the integrity of the electrical 

bonding paths throughout the fuel line, 

which could lead to arcing between the vent 

line and airplane structure, and could result 

in possible fuel tank ignition in the event of 

a lightning strike. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Definition 

For the purposes of this AD, ‘‘prohibited 

tasks’’ are defined as any task identified in 

paragraph (l) of this AD and any procedure 

or task that specifies fuel tank access using 

non-manufacturer-approved procedures. 

(h) Modifications 

(1) For airplanes having S/N 4001 and 4003 

through 4525 inclusive: Within 6,000 flight 

hours or 36 months after the effective date of 

this AD, whichever occurs first, increase the 

hole size in the collector tank partition wall, 

inspect the motive flow line for damage, and 

replace the associated grommet and motive 

flow line, in accordance with paragraph 3.B. 

of the Accomplishment Instructions of 

Bombardier Service Bulletin 84–28–18, 

Revision B, dated April 20, 2017. 

(2) For airplanes having S/N 4001 and 4003 

through 4533 inclusive, on which 

Bombardier Service Bulletin 84–28–19, dated 

August 16, 2016; or Revision A, dated 

November 4, 2016, has not been done: Within 

6,000 flight hours or 36 months after the 

effective date of this AD, whichever occurs 

first, replace the affected single nut plate 

brackets and standoffs at the affected lefthand (LH) and right-hand (RH) wing stations 

on the motive flow line and pressure relief 

line, in accordance with paragraphs 3.B. and 

3.C. of Bombardier Service Bulletin 84–28– 

19, Revision D, dated February 16, 2018. 

(3) Accomplishing Bombardier Repair 

Drawing 8/4–28–018, Issue 1, dated October 

30, 2017; Issue 2, dated June 12, 2018; Issue 

3, dated June 21, 2018; or Issue 04, dated July 

27, 2018, is an alternative method of 

compliance (AMOC) only for the replacement 

of the affected single nut plate brackets and 

standoffs on the motive flow line and vent 

line at LH and RH wing stations Yw ± 

209.019 and Yw ± 317.019 required by 

paragraph (h)(2) of this AD. 

(4) Accomplishing Bombardier Repair 

Drawing 8/4–28–018, Issue 1, dated October 

30, 2017; Issue 2, dated June 12, 2018; Issue 

3, dated June 21, 2018; or Issue 04, dated July 

27, 2018, prior to the effective date of this 

AD, along with the replacement of the 


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affected single nut plate brackets and 

standoffs on the motive flow line, vent line, 

pressure relief line, and scavenge line at LH 

and RH wing stations Yw ± 209.019, Yw ± 

317.019, and Yw ± 371.019, is an acceptable 

method of compliance for the actions 

required by paragraph (h)(2) of this AD. 

(5) For airplanes having S/N 4001 and 4003 

through 4533 inclusive, on which 

Bombardier Service Bulletin 84–28–19, dated 

August 16, 2016; or Revision A, dated 

November 4, 2016, has been done: Within 

6,000 flight hours or 36 months after the 

effective date of this AD, whichever occurs 

first, inspect the motive flow line and vent 

line at wing stations –371.019 and 371.019 in 

the LH and RH fuel tanks, respectively, to 

ensure that these fuel tubes are adequately 

supported, and inspect the fuel tubes to 

verify that an appropriate clearance has been 

maintained between the fuel tubes and their 

support brackets, in accordance with 

paragraph 3.B., step (13), and paragraph 3.C., 

of Bombardier Service Bulletin 84–28–19, 

Revision D, dated February 16, 2018. 

(6) For airplanes having S/N 4001 and 4003 

through 4572 inclusive: Within 8,000 flight 

hours or 48 months after the effective date of 

this AD, whichever occurs first, install 

TeflonTM sleeves on the vent line at wing 

stations Yw ± 209.019 and Yw ± 371.019 in 

the LH and RH fuel tanks, inspect the 

TeflonTM sleeve installation on the vent line 

at wing stations Yw ± 317.019 in the LH and 

RH fuel tanks, and if any sleeve is incorrectly 

installed, reposition the TeflonTM sleeves 

before further flight, in accordance with 

paragraphs 3.B. and 3.C. of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–28–24, dated November 

27, 2017. 

(7) Prior to accomplishment of the actions 

required by paragraph (h)(6) of this AD, the 

applicable actions specified in paragraph 

(h)(2) or (5) of this AD must be done. 

Accomplishment of Bombardier Modification 

Summary (ModSum) 4Q113904 on an 

airplane prior to the effective date of this AD 

is acceptable for compliance with this 

paragraph. 

(8) For airplanes having S/N 4001 and 4003 

through 4575 inclusive: Within 8,000 flight 

hours or 48 months after the effective date of 

this AD, whichever occurs first, inspect the 

TeflonTM sleeve installation on the vent line 

in the LH and RH fuel tanks for correct 

installation and damage, and if the sleeves 

are incorrectly installed or damage is found, 

before further flight, replace and reposition 

the TeflonTM sleeves, as applicable, in 

accordance with paragraphs 3.B. and 3.C. of 

the Accomplishment Instructions of 

Bombardier Service Bulletin 84–28–25, dated 

November 27, 2017. 

(9) Prior to accomplishment of the actions 

required by paragraph (h)(8) of this AD, the 

applicable actions specified in paragraph 

(h)(2) or (5) of this AD must be done. 

Accomplishment of Bombardier ModSum 

4Q113904 on an airplane prior to the 

effective date of this AD is acceptable for 

compliance with this paragraph. 

(i) Verification and Rework for Existing 

Maintenance Program 

(1) For airplanes having S/N 4001 and 4003 

through 4575 inclusive, on which the actions 

required by paragraph (h)(6) or (8) of this AD 

have been done before the effective date of 

this AD, or that have complied with 

paragraph (m)(4) of this AD: Within 60 days 

after the effective date of this AD, review the 

airplane maintenance records to confirm if 

any of the prohibited tasks (defined in 

paragraph (g) of this AD) were accomplished 

during or after compliance with paragraph 

(h)(6) or (8) of this AD or paragraph (m)(4) 

of this AD. 

(i) If any of the prohibited tasks were 

accomplished during or after compliance 

with paragraph (h)(6) or (m)(4) of this AD, or 

if it cannot be conclusively confirmed that 

they were not accomplished during or after 

compliance with paragraph (h)(6) or 

paragraph (m)(4) of this AD: Within 8,000 

flight hours or 48 months after the effective 

date of this AD, whichever occurs first, do 

the actions required by paragraph (h)(6) of 

this AD and, as applicable, comply with the 

requirements of paragraph (h)(7) of this AD. 

(ii) If any of the prohibited tasks were 

accomplished during or after compliance 

with paragraph (h)(8) of this AD, or if it 

cannot be conclusively confirmed that they 

were not accomplished during or after 

compliance with paragraph (h)(8) of this AD: 

Within 8,000 flight hours or 48 months after 

the effective date of this AD, whichever 

occurs first, do the actions required by 

paragraph (h)(8) of this AD and, as 

applicable, comply with the requirements of 

paragraph (h)(9) of this AD. 

(2) For airplanes having S/N 4573 and 

subsequent, with an airplane date of 

manufacture, as identified on the 

identification plate of the airplane, dated 

before the effective date of this AD: Within 

60 days after the effective date of this AD, 

review the airplane maintenance records to 

confirm if any of the prohibited tasks 

(defined in paragraph (g) of this AD) were 

accomplished on or after the airplane date of 

manufacture. If any of the prohibited tasks 

were accomplished on or after the airplane 

date of manufacture, or if it cannot be 

conclusively confirmed that they were not 

accomplished on or after the airplane date of 

manufacture, within 8,000 flight hours or 48 

months after the effective date of this AD, 

whichever occurs first, obtain and follow 

instructions for rework using a method 

approved by the Manager, New York ACO 

Branch, FAA; or Transport Canada Civil 

Aviation (TCCA); or De Havilland Aircraft of 

Canada Limited’s TCCA Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(j) Maintenance or Inspection Program 

Revision 

For all airplanes: Within 30 days after the 

effective date of this AD, revise the existing 

maintenance or inspection program, as 

applicable, to incorporate the information 

specified in (Bombardier) Q400 Dash 8 

Temporary Revision (TR) ALI–0192 and TR 

ALI–0193, both dated April 24, 2018, into 

Section 4—28 Fuel System Limitation, or 

Section 5—00 Critical Design Configuration 

Control Limitations, as applicable, of Part 2, 

of the Bombardier Q400 Dash 8 Maintenance 

Requirements Manual, PSM 1–84–7. The 

initial compliance time for doing the tasks in 

(Bombardier) Q400 Dash 8 TR ALI–0192, 

dated April 24, 2018, is at the applicable time 

specified in paragraph (j)(1) or (2) of this AD, 

whichever occurs later: 

(1) Prior to the accumulation of 18,000 

total flight cycles or within 108 months since 

issuance of the original airworthiness 

certificate or original export certificate of 

airworthiness, whichever occurs first. 

(2) Within 90 days after the effective date 

of this AD. 

(k) No Alternative Actions, Intervals, or 

Critical Design Configuration Control 

Limitations (CDCCLs) 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (j) of this AD, no 

alternative actions (e.g., inspections), 

intervals, or CDCCLs may be used unless the 

actions, intervals, and CDCCLs are approved 

as an AMOC in accordance with the 

procedures specified in paragraph (n)(1) of 

this AD. 

(l) Maintenance Task Prohibitions 

For all airplanes: As of the effective date 

of this AD, comply with the prohibitions 

specified in paragraphs (l)(1) and (2) of this 

AD. 

(1) It is prohibited to use the Bombardier 

airplane maintenance manual (AMM) tasks 

identified in paragraphs (l)(1)(i) through (v) 

of this AD, which are specified in the 

Bombardier Q400 Dash 8 AMM, PSM 1–84– 

2, Revision 59 dated October 5, 2017, or 

earlier revisions of these tasks. TRs including 

these AMM tasks, dated November 27, 2017, 

or earlier, are also prohibited for use except 

as specified in paragraph (l)(1)(i) through (v) 

of this AD. 

(i) Task 28–10–00–280–806 Detailed 

Inspection of the TeflonTM Sleeve on the Fuel 

Tank Vent Line, LH and RH (FSL#284000– 

406), with the exception of (Bombardier) 

Q400 Dash 8 AMM TR 28–145, dated 

November 21, 2017. 

(ii) Task 28–12–06–000–801 Removal of 

the Outboard Vent Line, with the exception 

of (Bombardier) Q400 Dash 8 AMM TR 28– 

146, dated November 21, 2017. 

(iii) Task 28–12–06–400–801 Installation of 

the Outboard Vent Line, with the exception 

of (Bombardier) Q400 Dash 8 AMM TR 28– 

147, dated November 21, 2017. 

(iv) Task 28–12–01–000–801 Removal of 

the Inboard Vent Line, with the exception of 

(Bombardier) Q400 Dash 8 AMM TR 28–148, 

dated November 24, 2017. 

(v) Task 28–12–01–400–801 Installation of 

the Inboard Vent Line, with the exception of 

(Bombardier) Q400 Dash 8 AMM TR 28–149, 

dated November 27, 2017. 

(2) It is prohibited to use the Bombardier 

Q400 Dash 8 Maintenance Task Card Manual 

(MTCM) task cards identified in paragraphs 

(l)(2)(i) and (ii) of this AD that are specified 

in the Bombardier Q400 Dash 8 MTCM, PSM 

1–84–7TC, Revision 42 dated November 5, 

2017, or earlier revisions or amendments of 

these task cards. MTCM task card revisions 

or amendments dated November 21, 2017, or 

earlier, are also prohibited for use, except as 

specified in paragraphs (l)(2)(i) and (ii) of this 

AD. 


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16666 Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 

(i) Bombardier Q400 Dash 8 MTCM 

Maintenance Task Card 000–28–520–704 

(Config A01), Detailed Inspection of the 

TeflonTM Sleeve on the Fuel Tank Vent Line 

(LH), with the exception of (Bombardier) 

Q400 Dash 8 MTCM Maintenance Task Card 

000–28–520–704 (Config A01), Detailed 

Inspection of the TeflonTM Sleeve on the Fuel 

Tank Vent Line (LH), Revision 42, 

Amendment 0002, dated November 21, 2017. 

(ii) Bombardier Q400 Dash 8 MTCM 

Maintenance Task Card 000–28–620–704 

(Config A01), Detailed Inspection of the 

TeflonTM Sleeve on the Fuel Tank Vent Line 

(RH), with the exception of (Bombardier) 

Q400 Dash 8 MTCM Maintenance Task Card 

000–28–620–704 (Config A01), Detailed 

Inspection of the TeflonTM Sleeve on the Fuel 

Tank Vent Line (RH), Revision 42, 

Amendment 0002, dated November 21, 2017. 

(m) Credit for Previous Actions 

(1) This paragraph provides credit for 

actions required by paragraph (h)(1) of this 

AD, if those actions were performed before 

the effective date of this AD using 

Bombardier Service Bulletin 84–28–18, dated 

April 20, 2016; or Revision A, dated 

November 14, 2016. 

(2) This paragraph provides credit for 

actions required by paragraph (h)(2) of this 

AD, if those actions were performed before 

the effective date of this AD using 

Bombardier Service Bulletin 84–28–19, 

Revision B, dated July 28, 2017, or Revision 

C, dated September 1, 2017. 

(3) This paragraph provides credit for 

actions required by paragraph (h) (5) of this 

AD, if those actions were performed before 

the effective date of this AD using paragraphs 

3.A. and 3.C and paragraph 3.B., step (13) of 

Bombardier Service Bulletin 84–28–19, 

Revision B, dated July 28, 2017, or Revision 

C, dated September 1, 2017 

(4) This paragraph provides credit for 

actions required by paragraph (h)(6) of this 

AD, if, before the effective date of this AD, 

the ModSums identified in paragraph 

(m)(4)(i), (ii), or (iii) of this AD were 

incorporated, and provided the conditions 

identified in figure 1 to paragraph (m)(4) of 

this AD have been met. 

(i) Incorporation of both a modsum 

identified in paragraph (m)(4)(i)(A) of this 

AD and a modsum identified in paragraph 

(m)(4)(i) (B) of this AD. 

(A) One of the modsums identified in 

paragraphs (m)(4)(i)(A)(1) through (9) of this 

AD. 

(1) Bombardier ModSum IS4Q2800023, 

Revision A, dated February 7, 2017. 

(2) Bombardier ModSum IS4Q2800023, 

Revision B, dated April 11, 2017. 

(3) Bombardier ModSum IS4Q2800023, 

Revision C, dated August 30, 2017. 

(4) Bombardier ModSum IS4Q2800023, 

Revision D, dated October 11, 2017. 

(5) Bombardier ModSum IS4Q2800023, 

Revision E, dated October 19, 2017. 

(6) Bombardier ModSum IS4Q2800023, 

Revision F, dated October 20, 2017. 

(7) Bombardier ModSum IS4Q2800023, 

Revision G, dated November 24, 2017. 

(8) Bombardier ModSum IS4Q2800023, 

Revision H, dated November 29, 2017. 

(9) Bombardier ModSum IS4Q2800023, 

Revision J, dated December 12, 2017. 

(B) One of the modsums identified in 

paragraphs (m)(4)(i)(B)(1) through (5) of this 

AD. 

(1) Bombardier ModSum IS4Q2800025, 

Revision A, dated October 20, 2017. 

(2) Bombardier ModSum IS4Q2800025, 

Revision B, dated November 3, 2017. 

(3) Bombardier ModSum IS4Q2800025, 

Revision C, dated November 21, 2017. 

(4) Bombardier ModSum IS4Q2800025, 

Revision D, dated November 23, 2017. 

(5) Bombardier ModSum IS4Q2800025, 

Revision E, dated November 29, 2017. 

(ii) Incorporation of both a modsum 

identified in paragraph (m)(4)(ii)(A) of this 

AD and a modsum identified in paragraph 

(m)(4)(ii)(B) of this AD. 

(A) Bombardier ModSum IS4Q2800030, 

Revision A, dated November 3, 2017; or 

Bombardier ModSum IS4Q2800030, Revision 

B, dated November 21, 2017. 

(B) One of the modsums identified in 

paragraphs (m)(4)(ii)(B)(1) through (5) of this 

AD. 

(1) Bombardier ModSum IS4Q2800025, 

Revision A, dated October 20, 2017. 

(2) Bombardier ModSum IS4Q2800025, 

Revision B, dated November 3, 2017. 

(3) Bombardier ModSum IS4Q2800025, 

Revision C, dated November 21, 2017. 

(4) Bombardier ModSum IS4Q2800025, 

Revision D, dated November 23, 2017, 

(5) Bombardier ModSum IS4Q2800025, 

Revision E, dated November 29, 2017. 

(iii) Incorporation of a modsum identified 

in paragraphs (m)(4)(iii)(A) through (C) of 

this AD. 

(A) Bombardier ModSum IS4Q2800027, 

Revision A, dated October 27, 2017. 

(B) Bombardier ModSum IS4Q2800027, 

Revision B, dated November 9, 2017. 

(C) Bombardier ModSum IS4Q2800027, 

Revision C, dated November 15, 2017. 

(n) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): 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 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to ATTN: Program Manager, 


khammond on DSKJM1Z7X2PROD with PROPOSALSEP24MR22.057</GPH>

Figure 1 to paragraph (m)(4)- Conditions for ModSum Credit 

It can be conclusively confirmed that none of the prohibited tasks 

Condition 1 (defined in paragraph (g) of this AD) were performed during or after 

the incorporation of any of the applicable modsums identified in 

paragraphs (m)(4)(i) through (iii) of this AD. 

It can be conclusively confirmed that Bombardier Service Bulletin 

Condition 2 84-28-19 or Bombardier ModSum 4Ql 13904 (any revision) was 

incorporated prior to the incorporation of any of the applicable 

modsums identified in paragraphs (m)(4)(i) through (iii) of this AD. 

It can be conclusively confirmed that Bombardier ModSum 

IS4Q2800023 (Revisions A, B, C, D, E, F, G, H, and J), Bombardier 

Condition 3 ModSum IS4Q2800030 (Revisions A and B), Bombardier ModSum 

IS4Q2800025 (Revisions A, B, C, D, and E), and Bombardier 

ModSum IS4Q2800027 (Revisions A and B) were not incorporated 

during or after the actions required by paragraph (h)(8) of this AD. 
Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 16667 

Continuing Operational Safety, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300. Before using any approved 

AMOC, notify your appropriate principal 

inspector, or lacking a principal inspector, 

the manager of the responsible Flight 

Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, New York ACO Branch, 

FAA; or TCCA; or De Havilland Aircraft of 

Canada Limited’s TCCA Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(o) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) TCCA AD 

CF–2017–05R2, dated September 20, 2019, 

for related information. This MCAI may be 

found in the AD docket on the internet at 

https://www.regulations.gov by searching for 

and locating Docket No. FAA–2022–0287. 

(2) For more information about this AD, 

contact Joseph Catanzaro, Aerospace 

Engineer, Airframe and Propulsion Section, 

FAA, New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7366; email 9-avs-nyacocos@faa.gov. 

(3) For service information identified in 

this AD, contact De Havilland Aircraft of 

Canada Limited, Q-Series Technical Help 

Desk, 123 Garratt Boulevard, Toronto, 

Ontario M3K 1Y5, Canada; telephone 416– 

375–4000; fax 416–375–4539; email thd@

dehavilland.com; internet https://

dehavilland.com. You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety Branch, 

2200 South 216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

Issued on March 15, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–05964 Filed 3–23–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2022–0216; Airspace 

Docket No. 19–AAL–63] 

RIN 2120–AA66 

Proposed Amendment of United States 

Area Navigation (RNAV) Route T–230; 

St. Paul Island, AK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

amend United States Area Navigation 

(RNAV) route T–230 in the vicinity of 

St. Paul Island, AK in support of a large 

and comprehensive T-route 

modernization project for the state of 

Alaska. 

DATES: Comments must be received on 

or before May 9, 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: (800) 

647–5527, or (202) 366–9826. You must 

identify FAA Docket No. FAA–2022– 

0216; Airspace Docket No. 19–AAL–63 

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 Rules 

and Regulations Group, Federal 

Aviation Administration, 800 

Independence Avenue SW, Washington, 

DC 20591; telephone: (202) 267–8783. 

FOR FURTHER INFORMATION CONTACT: 

Christopher McMullin, Rules and 

Regulations Group, Office of Policy, 

Federal Aviation Administration, 800 

Independence Avenue SW, Washington, 

DC 20591; telephone: (202) 267–8783. 

SUPPLEMENTARY INFORMATION: 

Authority for This Rulemaking 

The FAA’s authority to issue rules 

regarding aviation safety is found in 

Title 49 of the United States Code. 

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. This rulemaking is 

promulgated under the authority 

described in Subtitle VII, Part A, 

Subpart I, Section 40103. Under that 

section, the FAA is charged with 

prescribing regulations to assign the use 

of the airspace necessary to ensure the 

safety of aircraft and the efficient use of 

airspace. This regulation is within the 

scope of that authority as it would 

expand the availability of RNAV in 

Alaska and improve the efficient flow of 

air traffic within the National Airspace 

System (NAS) by lessoning the 

dependency on ground based 

navigation. 

Comments Invited 

Interested parties are invited to 

participate in this proposed rulemaking 

by submitting such written data, views, 

or arguments as they may desire. 

Comments that provide the factual basis 

supporting the views and suggestions 

presented are particularly helpful in 

developing reasoned regulatory 

decisions on the proposal. Comments 

are specifically invited on the overall 

regulatory, aeronautical, economic, 

environmental, and energy-related 

aspects of the proposal. 

Communications should identify both 

docket numbers (FAA Docket No. FAA– 

2022–0216; Airspace Docket No. 19– 

AAL–63) and be submitted in triplicate 

to the Docket Management Facility (see 

ADDRESSES section for address and 

phone number). You may also submit 

comments through the internet at 

https://www.regulations.gov. 

Commenters wishing the FAA to 

acknowledge receipt of their comments 

on this action must submit with those 

comments a self-addressed, stamped 

postcard on which the following 

statement is made: ‘‘Comments to FAA 

Docket No. FAA–2022–0216; Airspace 

Docket No. 19–AAL–63.’’ The postcard 

will be date/time stamped and returned 

to the commenter. 

All communications received on or 

before the specified comment closing 

date will be considered before taking 

action on the proposed rule. The 

proposal contained in this action may 

be changed in light of comments 

received. All comments submitted will 

be available for examination in the 

public docket both before and after the 

comment closing date. A report 

summarizing each substantive public 

contact with FAA personnel concerned 

with this rulemaking will be filed in the 

docket. 

Availability of NPRM 

An electronic copy of this document 

may be downloaded through the 

internet at https://www.regulations.gov. 

Recently published rulemaking 

documents can also be accessed through 

the FAA’s web page at https://

www.faa.gov/air_traffic/publications/ 

airspace_amendments/. 

You may review the public docket 

containing the proposal, any comments 

received and any final disposition in 

person in the Dockets Office (see 

ADDRESSES section for address and 

phone number) between 9:00 a.m. and 

5:00 p.m., Monday through Friday, 

except Federal holidays. An informal 

docket may also be examined during 

normal business hours at the office of 

the Western Service Center, Operations 

Support Group, Federal Aviation 

Administration, 2200 South 216th St., 

Des Moines, WA 98198. 


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