Federal Register / Vol. 88, No. 205 / Wednesday, October 25, 2023 / Proposed Rules 73265 

the records of the insured credit union 

or from records maintained, in good 

faith and in the regular course of 

business, by the attorney or the escrow 

agent administering the account, or by 

some person or entity that has 

undertaken to maintain such records for 

the attorney or escrow agent. The NCUA 

will determine, in its sole discretion, the 

sufficiency of these records for an 

IOLTA or other similar escrow account. 

* * * * * 

Appendix to Part 745 [Removed] 

■ 12. Remove Appendix to Part 745. 

[FR Doc. 2023–23481 Filed 10–24–23; 8:45 am] 

BILLING CODE 7535–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–2001; Project 

Identifier MCAI–2023–00666–T] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc., Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2021–20–13, which applies to certain 

Bombardier, Inc., Model CL–600–2B16 

(604 Variant) airplanes. AD 2021–20–13 

requires repetitive lubrication and 

repetitive detailed visual inspections 

(DVI) and non-destructive test (NDT) 

inspections of the main landing gear 

(MLG) shock strut lower pins, and 

replacement if necessary. Since the FAA 

issued AD 2021–20–13, Bombardier, 

Inc. developed a new design solution for 

this potential failure. This proposed AD 

would continue to require the 

lubrication and inspections specified in 

AD 2021–20–13 until the MLG shock 

strut assembly is modified by replacing 

the trailing arm bushing and installing 

new dynamic joint components. 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 December 11, 

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–2023–2001; 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 mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For service information identified 

in this NPRM, contact Bombardier, Inc., 

200 Coˆte-Vertu Road West, Dorval, 

Que ́bec H4S 2A3, Canada; North 

America toll-free telephone 1–866–538– 

1247 or direct-dial telephone 1–514– 

855–2999; email ac.yul@

aero.bombardier.com; website 

bombardier.com. 

• You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 2200 South 216th Street, Des 

Moines, WA. For information on the 

availability of this material at the FAA, 

call 206–231–3195. 

FOR FURTHER INFORMATION CONTACT: 

Gabriel Kim, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; telephone 516– 

228–7300; 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–2023–2001; Project Identifier 

MCAI–2023–00666–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 

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 Gabriel Kim, Aviation 

Safety Engineer, FAA, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 

11590; telephone 516–228–7300; email 

9-avs-nyaco-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 

The FAA issued AD 2021–20–13, 

Amendment 39–21751 (86 FR 57033, 

October 14, 2021) (AD 2021–20–13), for 

certain Bombardier, Inc., CL–600–2B16 

(604 Variant) airplanes. AD 2021–20–13 

was prompted by an MCAI originated by 

Transport Canada, which is the aviation 

authority for Canada. Transport Canada 

issued AD CF–2020–54R1, dated 

December 23, 2020 (Transport Canada 

AD CF–2020–54R1), to correct an unsafe 

condition identified as cracking of the 

MLG shock strut lower pin part number 

19146–3. Transport Canada AD CF– 

2020–54R1 states that friction torque, 

when the shock strut is under 

compression loading, causes the pin 

anti-rotation tangs to become loaded 

beyond their load carrying capability. 

According to Transport Canada, this 

overload condition can result in pin 

fracture originating at the base of the pin 

anti-rotation tang and is aggravated by 

inadequate lubrication. 

AD 2021–20–13 requires repetitively 

lubricating, repetitively inspecting (DVI 

and NDT inspections for cracking and 

damage, including fracture of the MLG 

shock strut lower pin at the pin rotation 

tang location), and replacing the MLG 

shock strut lower pin if there is any 


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73266 Federal Register / Vol. 88, No. 205 / Wednesday, October 25, 2023 / Proposed Rules 

cracking or damage as a result of the 

inspections. The FAA issued AD 2021– 

20–13 to address cracking of the MLG 

shock strut lower pin. If not addressed, 

this condition could result in structural 

failure of one or both MLG. 

Actions Since AD 2021–20–13 Was 

Issued 

Since the FAA issued AD 2021–20– 

13, Transport Canada superseded 

Transport Canada AD CF–2020–54R1 

and issued Transport Canada AD CF– 

2023–32, dated May 9, 2023 (referred to 

after this as ‘‘the MCAI’’). The MCAI 

states there is a new design solution for 

this potential failure of the shock strut 

lower pin, which involves replacing the 

training arm bushings at the attachment 

and reassembly of the MLG shock strut 

assembly to training arm assembly joint 

with new dynamic joint components. As 

a result, the MCAI requires this new 

design as terminating action for the 

requirements of Transport Canada AD 

CF–2020–54R1. 

Bombardier, Inc. also reduced the 

range of one group of applicable aircraft 

from serial numbers 6050 through 6999 

to 6050 through 6188. Bombardier, Inc. 

advises that subsequent aircraft are 

scheduled to have the new design 

completed in production. Therefore, the 

FAA has revised the applicability of this 

proposed AD accordingly. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–2001. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Bombardier, Inc., 

service information: 

• Service Bulletin 604–32–031, dated 

December 29, 2022. 

• Service Bulletin 605–32–008, dated 

December 29, 2022. 

• Service Bulletin 650–32–005, dated 

December 29, 2022. 

This service information contains 

procedures for disassembling the leftand right-hand MLG shock strut and 

trailing arm joint, replacing the trailing 

arm bushings at the attachment, and reassembling the joint with new dynamic 

joint components. These documents are 

distinct since they apply to different 

airplane configurations. 

This proposed AD would also require 

the following Bombardier, Inc., service 

information, which the Director of the 

Federal Register approved for 

incorporation by reference as of 

November 18, 2021 (86 FR 57033, 

October 14, 2021): 

• Service Bulletin 604–32–030, dated 

June 30, 2020. 

• Service Bulletin 605–32–007, dated 

June 30, 2020. 

• Service Bulletin 650–32–004, dated 

June 30, 2020. 

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 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 that 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 retain all of 

the requirements of AD 2021–20–13 

until the MLG shock strut assembly to 

trailing arm assembly joint is modified 

by accomplishing the actions specified 

in the service information described 

previously. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 433 

airplanes of U.S. registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Action Labor cost Parts cost Cost per product Cost on U.S. operators 

Lubrication and inspections 

(retained actions from AD 

2021–20–13).

7 work-hours × $85 per hour 

= $595.

$0 $595 per cycle ....................... $257,635 per cycle. 

Modification and testing (new 

proposed actions).

9 work-hours × $85 per hour 

= $765.

2,435 3,200 ...................................... 1,385,600. 

The FAA estimates the following 

costs to do any necessary on-condition 

replacement that would be required 

based on the results of the repetitive 

inspections. The FAA has no way of 

determining the number of aircraft that 

might need this on-condition action: 

ESTIMATED COSTS OF ON-CONDITION REPLACEMENT

Labor cost Parts cost Cost per 

product 

6 work-hours × $85 per hour = $510 ...................................................................................................................... $2,435 $2,945 

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 


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Federal Register / Vol. 88, No. 205 / Wednesday, October 25, 2023 / Proposed Rules 73267 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

The FAA has 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) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by: 

■ a. Removing Airworthiness Directive 

2021–20–13, Amendment 39–21751 (86 

FR 57033, October 14, 2021); and 

■ b. Adding the following new 

Airworthiness Directive: 

Bombardier, Inc.: Docket No. FAA–2023– 

2001; Project Identifier MCAI–2023– 

00666–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by December 11, 

2023. 

(b) Affected ADs 

This AD replaces AD 2021–20–13, 

Amendment 39–21751 (86 FR 57033, October 

14, 2021) (AD 2021–20–13). 

(c) Applicability 

This AD applies to Bombardier, Inc., 

Model CL–600–2B16 (604 Variant) airplanes, 

serial numbers (S/N) 5301 through 5665 

inclusive, 5701 through 5988 inclusive, and 

6050 through 6188 inclusive, certificated in 

any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code: 32, Landing gear. 

(e) Reason 

This AD was prompted by reports of 

cracking of the main landing gear (MLG) 

shock strut lower pin. The FAA is issuing 

this AD to address cracking of the MLG shock 

strut lower pin. The unsafe condition, if not 

addressed, could result in structural failure 

of one or both MLG. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Repetitive Lubrication, With 

Revised Applicability 

This paragraph restates the requirements of 

paragraph (g) of AD 2021–20–13, with 

revised applicability. Within 200 flight hours 

(FH) or 12 months after November 18, 2021 

(the effective date of AD 2021–20–13), 

whichever occurs first, lubricate the left-hand 

(LH) and right-hand (RH) MLG shock strut 

lower pins having part number (P/N) 19146– 

3, in accordance with paragraph 2.B., ‘‘Part 

A,’’ of the Accomplishment Instructions of 

the applicable service bulletin, as specified 

in paragraphs (g)(1) through (3) of this AD. 

Repeat thereafter at intervals not to exceed 

200 FH or 12 months, whichever occurs first. 

(1) For airplanes having S/N 5301 through 

5665 inclusive: Bombardier Service Bulletin 

604–32–030, dated June 30, 2020. 

(2) For airplanes having S/N 5701 through 

5988 inclusive: Bombardier Service Bulletin 

605–32–007, dated June 30, 2020. 

(3) For airplanes having S/N 6050 through 

6188 inclusive: Bombardier Service Bulletin 

650–32–004, dated June 30, 2020. 

(h) Retained Detailed Visual Inspections 

(DVI), With No Changes 

This paragraph restates the requirements of 

paragraph (h) of AD 2021–20–13, with no 

changes. At the applicable compliance time 

specified in paragraphs (h)(1) through (3) of 

this AD, perform the DVI for cracking and 

damage of the LH and RH MLG shock strut 

lower pins having part number (P/N) 19146– 

3, in accordance with paragraph 2.C., ‘‘Part 

B,’’ of the Accomplishment Instructions of 

the applicable service bulletin, as specified 

in paragraphs (g)(1) through (3) of this AD. 

Repeat thereafter at intervals not to exceed 

400 FH or 24 months, whichever occurs first. 

If the DVI coincides with a non-destructive 

testing (NDT) inspection required by 

paragraph (i) of this AD, the NDT inspection 

supersedes the DVI for that interval only. If 

the accumulated flight cycles (FC) of the 

MLG shock strut lower pin are not known, 

use the related MLG assembly accumulated 

FC to determine when to accomplish the 

actions required by this paragraph. 

(1) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before November 18, 2021 (the effective date 

of AD 2021–20–13) and on which an MLG 

shock strut lower pin has accumulated fewer 

than 600 total FC on the pin as of November 

18, 2021: Before the accumulation of 750 

total FC on the pin. 

(2) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before November 18, 2021 (the effective date 

of AD 2021–20–13) and on which an MLG 

shock strut lower pin has accumulated 600 

total FC or more on the pin as of November 

18, 2021: Within 150 FC after November 18, 

2021. 

(3) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued after 

November 18, 2021 (the effective date of AD 

2021–20–13): Before the accumulation of 750 

total FC. 

(i) Retained NDT Inspection, With No 

Changes 

This paragraph restates the requirements of 

paragraph (i) of AD 2021–20–13, with no 

changes. At the applicable compliance time 

specified in paragraphs (i)(1) through (4) of 

this AD: Perform the NDT inspection for 

cracking and damage of the LH and RH MLG 

shock strut lower pins having P/N 19146–3, 

in accordance with paragraph 2.D., ‘‘Part C,’’ 

of the Accomplishment Instructions of the 

applicable service bulletin, as specified in 

paragraphs (g)(1) through (3) of this AD. 

Repeat thereafter at intervals not to exceed 

900 FC. If the accumulated FC of the MLG 

shock strut lower pin is not known, use the 

related MLG assembly accumulated FC to 

determine when to accomplish the actions 

required by this paragraph. 

(1) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before November 18, 2021 (the effective date 

of AD 2021–20–13) and on which an MLG 

shock strut lower pin has accumulated fewer 

than 1,200 total FC on the pin as of 

November 18, 2021: Before the accumulation 

of 1,500 total FC on the pin. 

(2) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before November 18, 2021 (the effective date 

of AD 2021–20–13) and on which an MLG 

shock strut lower pin has accumulated 1,200 

total FC or more but fewer than 2,000 total 

FC on the pin as of November 18, 2021: 

Within 300 FC after November 18, 2021, or 

before the accumulation of 2,200 total FC on 

the pin, whichever occurs first. 

(3) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before November 18, 2021 (the effective date 

of AD 2021–20–13) and on which an MLG 

shock strut lower pin that has accumulated 

2,000 total FC or more on the pin as of 

November 18, 2021: Within 200 FC after 

November 18, 2021. 

(4) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued after 

November 18, 2021 (the effective date of AD 

2021–20–13): Before the accumulation of 

1,500 total FC. 

(j) Retained Replacement, With No Changes 

This paragraph restates the requirements of 

paragraph (j) of AD 2021–20–13, with no 

changes. If, during any inspection required 

by this AD, any crack or damage of the MLG 


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73268 Federal Register / Vol. 88, No. 205 / Wednesday, October 25, 2023 / Proposed Rules 

shock strut lower pin is detected, before 

further flight, replace the affected MLG shock 

strut lower pin with a new part in accordance 

with paragraph 2.E., ‘‘Part D,’’ of the 

Accomplishment Instructions of the 

applicable service bulletin, as specified in 

paragraphs (g)(1) through (3) of this AD. 

(k) New Requirement of This AD: 

Modification 

Within 60 months from the effective date 

of this AD, modify the LH and RH MLG 

assembly in accordance with paragraph 2.B. 

of the Accomplishment Instructions of the 

applicable service bulletin, as specified in 

paragraphs (k)(1) through (3) of this AD. 

(1) For airplanes having S/N 5301 through 

5665 inclusive: Bombardier Service Bulletin 

604–32–031, dated December 29, 2022. 

(2) For airplanes having S/N 5701 through 

5988 inclusive: Bombardier Service Bulletin 

605–32–008, dated December 29, 2022. 

(3) For airplanes having S/N 6050 through 

6188 inclusive: Bombardier Service Bulletin 

650–32–005, dated December 29, 2022. 

(l) New Requirement of the AD: Testing 

Before further flight after completing 

paragraph (k) of this AD, perform the testing 

of the MLG shock strut assembly to trailing 

arm assembly joint in accordance with 

paragraph 2.C. of the Accomplishment 

Instructions of the applicable service 

bulletin, as specified in paragraphs (k)(1) 

through (3) of this AD. 

(m) Terminating Action 

Modifying and testing an airplane as 

required by paragraphs (k) and (l) of this AD 

terminates the initial and repetitive 

lubrication and inspections required by 

paragraphs (g), (h), and (i) of this AD for that 

airplane. 

(n) Additional AD Provisions 

(1) 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 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the International Validation 

Branch, mail it to the address identified in 

paragraph (o)(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 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, International Validation 

Branch, FAA; or Transport Canada; or 

Bombardier, Inc.’s Transport Canada Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(o) Additional Information 

(1) Refer to Transport Canada AD CF– 

2023–32, dated May 9, 2023, for related 

information. This Transport Canada AD may 

be found in the AD docket at regulations.gov 

under Docket No. FAA–2023–2001. 

(2) For more information about this AD, 

contact Gabriel Kim, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@faa.gov. 

(p) 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 this AD specifies otherwise. 

(3) The following service information was 

approved for IBR on [DATE 35 DAYS AFTER 

PUBLICATION OF THE FINAL RULE]. 

(i) Bombardier Service Bulletin 604–32– 

031, dated December 29, 2022. 

(ii) Bombardier Service Bulletin 605–32– 

008, dated December 29, 2022. 

(iii) Bombardier Service Bulletin 650–32– 

005, dated December 29, 2022. 

(4) The following service information was 

approved for IBR on November 18, 2021 (86 

FR 57033, October 14, 2021). 

(i) Bombardier Service Bulletin 604–32– 

030, dated June 30, 2020. 

(ii) Bombardier Service Bulletin 605–32– 

007, dated June 30, 2020. 

(iii) Bombardier Service Bulletin 650–32– 

004, dated June 30, 2020. 

(5) For service information identified in 

this AD, contact Bombardier, Inc., 200 CoˆteVertu Road West, Dorval, Que ́bec H4S 2A3, 

Canada; North America toll-free telephone 1– 

866–538–1247 or direct-dial telephone 1– 

514–855–2999; email ac.yul@

aero.bombardier.com; website 

bombardier.com. 

(6) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

Street, Des Moines, WA. For information on 

the availability of this material at the FAA, 

call 206–231–3195. 

(7) You may view this material at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

visit www.archives.gov/federal-register/cfr/ 

ibr-locations or email fr.inspection@nara.gov. 

Issued on October 19, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–23516 Filed 10–24–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2023–2040; Airspace 

Docket No. 22–AEA–21] 

RIN 2120–AA66 

Amendment of United States Area 

Navigation (RNAV) Routes; Eastern 

United States 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

establish three United States Area 

Navigation (RNAV) T-routes in the 

eastern United States. This action also 

proposes to amend one United States 

RNAV Q-route and amend five United 

States RNAV T-routes in the eastern 

United States. These actions support 

Next Generation Air Transportation 

System (NextGen) which provides a 

modern RNAV route structure to 

improve the efficiency of the National 

Airspace System (NAS). 

DATES: Comments must be received on 

or before December 11, 2023. 

ADDRESSES: Send comments identified 

by FAA Docket No. FAA–2023–0240 

and Airspace Docket No. 22–AEA–21 

using any of the following methods: 

* Federal eRulemaking Portal: Go to 

www.regulations.gov and follow the 

online instructions for sending your 

comments electronically. 

* Mail: Send comments to Docket 

Operations, M–30; U.S. Department of 

Transportation, 1200 New Jersey 

Avenue SE, Room W12–140, West 

Building Ground Floor, Washington, DC 

20590–0001. 

* Hand Delivery or Courier: Take 

comments to Docket Operations in 

Room W12–140 of the West Building 

Ground Floor at 1200 New Jersey 

Avenue SE, Washington, DC, between 9 

a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. 

* Fax: Fax comments to Docket 

Operations at (202) 493–2251. 

Docket: Background documents or 

comments received may be read at 

www.regulations.gov at any time. 

Follow the online instructions for 

accessing the docket or go to the Docket 

Operations in Room W12–140 of the 

West Building Ground Floor at 1200 

New Jersey Avenue SE, Washington, 

DC, between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

FAA Order JO 7400.11H, Airspace 

Designations and Reporting Points, and 


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