65308 Federal Register / Vol. 88, No. 183 / Friday, September 22, 2023 / Rules and Regulations 

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: 

2023–13–05 The Boeing Company: 

Amendment 39–22490; Docket No. 

FAA–2022–1250; Project Identifier AD– 

2022–00763–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective October 27, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

(1) This AD applies to all The Boeing 

Company Model 737–600, –700, –700C, 

–800, –900, and –900ER series airplanes, 

certificated in any category. 

(2) Installation of Supplemental Type 

Certificate (STC) ST00830SE does not affect 

the ability to accomplish the actions required 

by this AD. Therefore, for airplanes on which 

STC ST00830SE is installed, a ‘‘change in 

product’’ alternative method of compliance 

(AMOC) approval request is not necessary to 

comply with the requirements of 14 CFR 

39.17 

(d) Subject 

Air Transport Association (ATA) of 

America Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by a report 

indicating fuselage skin lap splice cracking 

was found between stations (STA) 767 and 

STA 787, just below S–14R fuselage skin lap 

splice, where a lower skin panel buckle 

intersected the upper skin of the lap splice. 

Cracking was also found just below S–14R 

between STA 747 and STA 767. The FAA is 

issuing this AD to address cracks, skin 

buckles, wrinkles, and bulges at fuselage 

longitudinal lap splice areas at S–4, S–14 and 

S–24. This condition, if not addressed, could 

result in cracks in fatigue-critical baseline 

structure and the inability of a principal 

structural element to sustain limit loads, 

which could adversely affect the structural 

integrity of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Except as specified by paragraph (h) of this 

AD: At the applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Special 

Attention Requirements Bulletin 737–53– 

1399 RB, Revision 1, dated March 14, 2023, 

do all applicable actions identified in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Special Attention 

Requirements Bulletin 737–53–1399 RB, 

Revision 1, dated March 14, 2023. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Special Attention 

Service Bulletin 737–53–1399 RB, Revision 

1, dated March 14, 2023, which is referred to 

in Boeing Special Attention Requirements 

Bulletin 737–53–1399 RB, Revision 1, dated 

March 14, 2023. 

(h) Exceptions to Service Information 

Specifications 

(1) Where the Compliance Time columns 

of the tables in the ‘‘Compliance’’ paragraph 

of Boeing Special Attention Requirements 

Bulletin 737–53–1399 RB, Revision 1, dated 

March 14, 2023, use the phrase ‘‘the original 

issue date of the Requirements Bulletin 737– 

53–1399 RB,’’ this AD requires using ‘‘the 

effective date of this AD.’’ 

(2) Where Boeing Special Attention 

Requirements Bulletin 737–53–1399 RB, 

Revision 1, dated March 14, 2023, specifies 

contacting Boeing for repair instructions or 

for alternative inspections: This AD requires 

doing the repair and doing the alternative 

inspections and applicable on-condition 

actions using a method approved in 

accordance with the procedures specified in 

paragraph (i) of this AD. 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, AIR–520 Continued 

Operational Safety 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 the attention of the person 

identified in paragraph (j)(1) of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov/. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, AIR–520 Continued Operational 

Safety Branch, FAA, to make those findings. 

To be approved, the repair method, 

modification deviation, or alteration 

deviation must meet the certification basis of 

the airplane, and the approval must 

specifically refer to this AD. 

(j) Related Information 

(1) For more information about this AD, 

contact Owen Bley-Male, Aviation Safety 

Engineer, FAA, 2200 South 216th St., Des 

Moines, WA 98198; phone: 206–231–3992; 

email: Owen.F.Bley-Male@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (k)(3) and (4) of this AD. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Boeing Special Attention Requirements 

Bulletin 737–53–1399 RB, Revision 1, dated 

March 14, 2023. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; internet 

myboeingfleet.com. 

(4) 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. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on June 30, 2023. 

Michael Linegang, 

Acting Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–20503 Filed 9–21–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1884; Project 

Identifier MCAI–2023–00482–A; Amendment 

39–22554; AD 2023–19–04] 

RIN 2120–AA64 

Airworthiness Directives; Aircraft 

Industries, a.s. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Aircraft Industries, a.s. Model L–420, L 

410 UVP–E20, and L 410 UVP–E20 

CARGO airplanes. This AD was 

prompted by reports of the pressure 

plates within the main landing gear 

(MLG) wheel brake unit malfunctioning. 

This AD requires replacing certain MLG 

wheel brake units with serviceable parts 

and prohibits installing an affected part 


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on any airplane. The FAA is issuing this 

AD to address the unsafe condition on 

these products. 

DATES: This AD is effective October 10, 

2023. 

The FAA must receive comments on 

this AD by November 6, 2023. 

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 

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. 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1884; or in person at 

Docket Operations between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. The AD docket 

contains this final rule, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Doug Rudolph, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; phone: 

(816) 329–4059; email: doug.rudolph@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written data, views, or arguments about 

this final rule. Send your comments to 

an address listed under ADDRESSES. 

Include ‘‘Docket No. FAA–2023–1884; 

Project Identifier MCAI–2023–00482– 

A’’ at the beginning of your comments. 

The most helpful comments reference a 

specific portion of the final rule, 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 final rule 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 

regulations.gov, including any personal 

information you provide. The agency 

will also post a report summarizing each 

substantive verbal contact received 

about this final rule. 

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 AD 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 AD, 

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 AD. Submissions containing CBI 

should be sent to Doug Rudolph, 

Aviation Safety Engineer, FAA, 1600 

Stewart Avenue, Suite 410, 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 

The European Union Aviation Safety 

Agency (EASA), which is the Technical 

Agent for the Member States of the 

European Union, has issued EASA AD 

2023–0055, dated March 16, 2023 

(referred to after this as the MCAI), to 

correct an unsafe condition on Aircraft 

Industries, a.s. Model L–410 M 

Turbolet, L–410 UVP—Turbolet, L–410 

UVP–E, L 410 UVP–E9, L 410 UVP–LW, 

L 410 UVP–E–LW, L 410 UVP–E20, L 

410 UVP–E20 CARGO, and L–420 

airplanes, all variants. The MCAI states 

there were several reports of the MLG 

wheel brake malfunctioning (blocking). 

Investigations revealed that all the 

malfunctions were caused by fractured 

brake pressure plates, and further 

analysis by Aircraft Industries, a.s. and 

the brake unit manufacturer showed 

that the root-cause of the failure was an 

improper (re-) design of certain pressure 

plates installed on certain serial 

numbers of MLG wheel brake unit part 

number (P/N) K38–1200–7. This 

condition, if not detected and corrected, 

could lead to reduced brake function, 

resulting in loss of control of the 

airplane, especially during taxiing, 

aborted take-off, or landing. The MCAI 

requires replacing all affected parts with 

serviceable parts, as defined in the 

MCAI. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1884. 

FAA’s Determination 

These products have been approved 

by the aviation authority of another 

country and are approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with this 

State of Design Authority, it has notified 

the FAA of the unsafe condition 

described in the MCAI referenced 

above. The FAA is issuing this AD after 

determining that the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. 

AD Requirements 

This AD requires accomplishing the 

actions specified in the MCAI described 

previously, except as discussed under 

‘‘Differences Between this AD and the 

MCAI.’’ This AD also prohibits 

installing on any airplane an MLG 

wheel brake unit P/N K38–1200–7 with 

serial number XXX–35, XXX–36, XXX– 

37, or XXX–38, where X represents any 

numerical value. 

Differences Between This AD and the 

MCAI 

The MCAI applicability includes 

Aircraft Industries a.s. Model L–410 M 

Turbolet, L–410 UVP—Turbolet, L–410 

UVP–E, L 410 UVP–E9, L 410 UVP–LW, 

and L 410 UVP–E–LW airplanes and 

this AD does not because those airplane 

models do not have an FAA type 

certificate. 

The MCAI specifies a compliance 

time based on an affected part’s number 

of flight cycles, but this AD requires a 

compliance time based on an affected 

part’s hours time-in-service (TIS). When 

doing the conversion from flight cycles 

to hours TIS, the FAA has estimated 

that 1 flight cycle is equal to 1 hour TIS. 

Justification for Immediate Adoption 

and Determination of the Effective Date 

Section 553(b)(3)(B) of the 

Administrative Procedure Act (APA) (5 

U.S.C. 551 et seq.) authorizes agencies 

to dispense with notice and comment 

procedures for rules when the agency, 

for ‘‘good cause,’’ finds that those 

procedures are ‘‘impracticable, 

unnecessary, or contrary to the public 

interest.’’ Under this section, an agency, 

upon finding good cause, may issue a 

final rule without providing notice and 

seeking comment prior to issuance. 

Further, section 553(d) of the APA 

authorizes agencies to make rules 

effective in less than thirty days, upon 

a finding of good cause. 

There are no affected airplanes 

currently on the U.S. registry. 

Accordingly, notice and opportunity for 

prior public comment are unnecessary, 

pursuant to 5 U.S.C. 553(b)(3)(B). In 


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addition, for the foregoing reason(s), the 

FAA finds that good cause exists 

pursuant to 5 U.S.C. 553(d) for making 

this amendment effective in less than 30 

days. 

Regulatory Flexibility Act 

The requirements of the Regulatory 

Flexibility Act (RFA) do not apply when 

an agency finds good cause pursuant to 

5 U.S.C. 553 to adopt a rule without 

prior notice and comment. Because the 

FAA has determined that it has good 

cause to adopt this rule without prior 

notice and comment, RFA analysis is 

not required. 

Costs of Compliance 

There are no costs of compliance with 

this AD because there are no affected 

airplanes on the U.S. Registry. In the 

event an affected product becomes a 

U.S.-registered product, the following is 

an estimate of the costs to comply with 

this AD. 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Replace affected MLG wheel brake unit ........ 8 work-hours × $85 per hour = $680 ............. $5,000 $5,680 $0 

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 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

and 

(2) Will not affect intrastate aviation 

in Alaska. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 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: 

2023–19–04 Aircraft Industries, a.s.: 

Amendment 39–22554; Docket No. 

FAA–2023–1884; Project Identifier 

MCAI–2023–00482–A. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective October 10, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Aircraft Industries, a.s. 

Model L–420, L 410 UVP–E20, and L 410 

UVP–E20 CARGO airplanes, all serial 

numbers, certificated in any category. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 3240, Landing Gear Brake System. 

(e) Unsafe Condition 

This AD was prompted by reports of the 

pressure plates within the main landing gear 

(MLG) wheel brake unit malfunctioning. The 

FAA is issuing this AD to address MLG 

wheel brake failures. The unsafe condition, if 

not addressed, could result in reduced brake 

function, resulting in loss of control of the 

airplane, especially during taxiing, aborted 

take-off, or landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Definitions 

The following definitions apply to this AD: 

(1) An ‘‘affected part’’ is an MLG wheel 

brake unit part number (P/N) K38–1200–7 

having serial number XXX–35, XXX–36, 

XXX–37, or XXX–38, where X represents any 

numerical value and where the MLG wheel 

brake unit has not been modified using 

sections B. and C. of the Implementation 

Information in LET Aircraft Industries 

Service Bulletin L–410/039a, Revision 1, 

dated October 25, 2022 (LET SB L–410/039a, 

Revision 1). 

(2) A ‘‘serviceable part’’ is an MLG wheel 

brake unit that is not P/N K38–1200–7 having 

serial number XXX–35, XXX–36, XXX–37, or 

XXX–38, where X represents any numerical 

value or where the MLG wheel brake unit P/ 

N K38–1200–7 having serial number XXX– 

35, XXX–36, XXX–37, or XXX–38 has been 

modified using sections B. and C. of the 

Implementation Information in LET SB L– 

410/039a, Revision 1. 

(h) Required Actions 

(1) For airplanes with an affected part 

installed: Before each affected part 

accumulates 1,500 hours time-in-service 

(TIS) since the affected part’s first installation 

on any airplane or within 10 hours TIS after 

the effective date of this AD, whichever 

occurs later, replace each affected part with 

a serviceable part. 

(2) As of the effective date of this AD, do 

not install an affected part on any airplane. 

(i) Alternative Methods of Compliance 

(AMOCs) 

The Manager, International Validation 

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 International Validation 

Branch, mail it to the address identified in 

paragraph (j)(2) of this AD or email to: 9- 

AVS-AIR-730-AMOC@faa.gov. If mailing 

information, also submit information by 

email. 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) Additional Information 

(1) Refer to European Union Aviation 

Safety Agency (EASA) AD 2023–0055, dated 

March 16, 2023, for related information. This 


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EASA AD may be found in the AD docket at 

regulations.gov under Docket No. FAA– 

2023–1884. 

(2) For more information about this AD, 

contact Doug Rudolph, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; phone: (816) 329– 

4059; email: doug.rudolph@faa.gov. 

(3) For service information identified in 

this AD that is not incorporated by reference, 

contact Aircraft Industries, a.s., Na Za ́honech 

1177, Kunovice, Czech Republic; phone: 

+420 572 817 664; email: pps@let.cz; website: 

let.cz/en/bulletin. You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety Branch, 

901 Locust Street, Kansas City, MO 64106. 

For information on the availability of this 

material at the FAA, call (817) 222–5110. 

(k) Material Incorporated by Reference 

None. 

Issued on September 18, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–20554 Filed 9–21–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2023–1325; Airspace 

Docket No. 23–AGL–17] 

RIN 2120–AA66 

Amendment of VOR Federal Airway V– 

36 and Establishment of RNAV Route 

T–675; Northcentral United States 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: This action amends Very High 

Frequency Omnidirectional Range 

(VOR) Federal airway V–36 and 

establishes Canadian Area Navigation 

(RNAV) route T–675 in the northcentral 

United States (US). The Air Traffic 

Service (ATS) route actions are 

necessary due to the planned 

decommissioning of the Wawa, Ontario 

(ON), Canada, VOR navigational aid 

(NAVAID). This action is in support of 

NAV CANADA’s NAVAID 

Modernization Program within Canada. 

DATES: Effective date 0901 UTC, 

November 30, 2023. The Director of the 

Federal Register approves this 

incorporation by reference action under 

1 CFR part 51, subject to the annual 

revision of FAA Order JO 7400.11 and 

publication of conforming amendments. 

ADDRESSES: A copy of the Notice of 

Proposed Rulemaking (NPRM), all 

comments received, this final rule, and 

all background material may be viewed 

online at www.regulations.gov using the 

FAA Docket number. Electronic 

retrieval help and guidelines are 

available on the website. It is available 

24 hours each day, 365 days each year. 

FAA Order JO 7400.11H, Airspace 

Designations and Reporting Points, and 

subsequent amendments can be viewed 

online at www.faa.gov/air_traffic/ 

publications/. You may also contact the 

Rules and Regulations Group, Office of 

Policy, Federal Aviation 

Administration, 800 Independence 

Avenue SW, Washington, DC 20591; 

telephone: (202) 267–8783. 

FOR FURTHER INFORMATION CONTACT: 

Colby Abbott, 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 modifies the 

ATS route structure as necessary to 

preserve the safe and efficient flow of 

air traffic within the National Airspace 

System. 

History 

The FAA published a notice of 

proposed rulemaking for Docket No. 

FAA–2023–1325 in the Federal Register 

(88 FR 37179; June 7, 2023), amending 

VOR Federal airway V–36 and 

establishing Canadian RNAV route T– 

675 in the northcentral US. The action 

is due to the planned decommissioning 

of the Wawa, Ontario (ON), Canada, 

VOR navigational aid (NAVAID) by 

NAV CANADA in support of their 

NAVAID Modernization Program. 

Interested parties were invited to 

participate in this rulemaking effort by 

submitting written comments on the 

proposal. No comments were received. 

Differences From the NPRM 

Subsequent to the NPRM, NAV 

CANADA clarified their intended action 

due to the planned decommissioning of 

the Wawa, ON, Canada VOR was to 

replace the existing V–36 entirely with 

a new RNAV route T–675 between the 

Thunder Bay, ON, Canada, area and the 

Sault Ste Marie, MI, VOR/Distance 

Measuring Equipment (DME) NAVAID. 

The NPRM proposed to remove the 

affected V–36 airway segments within 

US airspace between the Thunder Bay, 

ON, Canada, VOR/DME and the Sault 

Ste Marie, MI, VOR/DME, but only 

proposed to establish the replacement 

Canadian RNAV route T–675 for one of 

the two affected V–36 segments within 

US airspace. In the NPRM, the FAA 

proposed to establish the T–675 route 

segment over Lake Michigan between 

the NOJJE, MI, waypoint (WP) replacing 

the ‘‘CFZDP’’ computer navigation fix 

(CNF) and the RUXDU, MI, WP 

replacing the ‘‘CFTKM’’ CNF on the US/ 

Canada border, but not the second route 

segment overlaying V–36 in US airspace 

between the Sault Ste Marie VOR/DME 

northward to the US/Canada border. 

In order to provide continued cross 

border connectivity for the entirety of 

the new T–675 route replacing the 

existing V–36 airway between the 

Thunder Bay VOR/DME and the Sault 

Ste Marie VOR/DME, the FAA has 

determined this action must also 

include establishing a second segment 

of T–675 within US airspace between 

the Sault Ste Marie VOR/DME and the 

BBIGG, MI, WP replacing the ‘‘CFCMN’’ 

CNF on the US/Canada border. 

Although the second T–675 route 

segment was not proposed in the NPRM, 

its inclusion in this action retains the 

ATS routing provided by V–36 prior to 

this final rule, provides route continuity 

with NAV CANADA’s T–675 in 

Canadian airspace, assures continued 

cross border connectivity between 

Thunder Bay, Ontario, Canada and Sault 

Ste Marie, MI, and prevents any 

possible safety-related issues or 

confusion caused by the publication of 

the replacement T–675 route ending on 

the US/Canada border instead of the 

Sault Ste Marie VOR/DME NAVAID. 

Therefore, this action adds the 

Canadian RNAV route T–675 segment 

between the Sault Ste Marie VOR/DME 

and the BBIGG, MI, WP to the route 

description published in the NPRM. The 

Canadian RNAV route T–675 being 

established in this final rule extends 

between the Sault Ste Marie VOR/DME 

and the BBIGG, MI, WP and between the 

NOJJE, MI, WP and the RUXDU, MI, 

WP. 

Incorporation by Reference 

VOR Federal airways are published in 

paragraph 6010(a) and Canadian Area 

Navigation Routes are published in 

paragraph 6013 of FAA Order JO 


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