Federal Register / Vol. 88, No. 188 / Friday, September 29, 2023 / Proposed Rules 67121 

300 AFM (Imperial Version), Publication No. 

CSP 100–1, use Document Identification No. 

CH 300 AFM–I. 

(2) For airplane serial numbers 20501 

through 20906 inclusive: Section 05–42, 

Airconditioning & Pressurization, NonNormal Procedures Section, Bombardier 

Challenger 350 AFM, Publication No. CH 350 

AFM, Revision 37, dated November 9, 2022. 

Note 2 to paragraph (h)(2): For obtaining 

the procedures for Bombardier Challenger 

350 AFM, Publication No. CH 350 AFM, use 

Document Identification No. CH 350 AFM. 

(i) Testing of Overheat Detection Sensing 

Elements 

For airplane serial numbers 20001 through 

20457 inclusive and 20501 through 20906 

inclusive: Within 7,500 flight cycles or 96 

months, whichever occurs first, from the 

effective date of this AD, test the overheat 

detection sensing elements to determine if 

they are serviceable, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 100–36–10, dated December 

23, 2022, or Bombardier Service Bulletin 

350–36–003, dated December 23, 2022, as 

applicable. 

(1) For each sensing element that is 

serviceable, before further flight, mark the 

sensing element with a witness mark in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

100–36–10, dated December 23, 2022; or 

Bombardier Service Bulletin 350–36–003, 

dated December 23, 2022; as applicable. 

(2) For each sensing element that is not 

serviceable, before further flight, replace the 

sensing element with a serviceable part in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

100–36–10, dated December 23, 2022; or 

Bombardier Service Bulletin 350–36–003, 

dated December 23, 2022; as applicable. 

(j) Parts Installation Prohibition 

As of the effective date of this AD, no 

person may install an affected part on any 

airplane. 

(k) No Reporting Requirement 

Although Bombardier Service Bulletin 

100–36–10, dated December 23, 2022, and 

Bombardier Service Bulletin 350–36–003, 

dated December 23, 2022; specify to submit 

certain information to the manufacturer, this 

AD does not include that requirement. 

(l) Additional AD Provisions 

The following provisions also apply to this 

AD: 

(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 ATTN: Program Manager, 

Continuing Operational Safety, at the address 

identified in paragraph (m)(2) of this AD or 

email to: 9-avs-nyaco-cos@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. 

(m) Additional Information 

(1) Refer to Transport Canada AD CF– 

2023–09, dated February 14, 2023, for related 

information. This Transport Canada AD may 

be found in the AD docket at regulations.gov 

under Docket No. FAA–2023–1890. 

(2) For more information about this AD, 

contact Steven Dzierzynski, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

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

(n) 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. 

(i) Bombardier Service Bulletin 100–36–10, 

dated December 23, 2022. 

(ii) Bombardier Service Bulletin 350–36– 

003, dated December 23, 2022. 

(iii) Section 05–42, Air Conditioning & 

Pressurization, Non-Normal Procedures 

Section, Bombardier Challenger 300 AFM 

(Imperial Version), Publication No. CSP 100– 

1, Revision 71, dated November 9, 2022. 

Note 3 to paragraph (n)(2)(iii): For 

obtaining the procedures for Bombardier 

Challenger 300 AFM (Imperial Version), 

Publication No. CSP 100–1, use Document 

Identification No. CH 300 AFM–I. 

(iv) Section 05–42, Air Conditioning & 

Pressurization, Non-Normal Procedures 

Section, Bombardier Challenger 350 AFM, 

Publication No. CH 350 AFM, Revision 37, 

dated November 9, 2022. 

Note 4 to paragraph (n)(2)(iv): For 

obtaining the procedures for Bombardier 

Challenger 350 AFM, Publication No. CH 350 

AFM, use Document Identification No. CH 

350 AFM. 

(v) Liebherr Service Bulletin CFD–F1958– 

26–01, dated May 6, 2022. 

(3) For Bombardier service information 

identified in this AD, contact Bombardier 

Business Aircraft Customer Response Center, 

400 Coˆte-Vertu Road West, Dorval, Que ́bec 

H4S 1Y9, Canada; telephone 514–855–2999; 

email ac.yul@aero.bombardier.com; website 

bombardier.com. 

(4) For Liebherr-Aerospace Toulouse SAS 

service information identified in this AD, 

contact Liebherr-Aerospace Toulouse SAS, 

408, Avenue des Etats-Unis—B.P.52010, 

31016 Toulouse Cedex, France; telephone 

+33 (0)5.61.35.28.28; fax +33 

(0)5.61.35.29.29; email techpub.toulouse@

liebherr.com; website liebherr.aero. 

(5) 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. 

(6) 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, 

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

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

Issued on September 22, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–21102 Filed 9–28–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1892; Project 

Identifier MCAI–2023–00626–E] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for all 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) Model Trent 1000–AE3, Trent 

1000–CE3, Trent 1000–D3, Trent 1000– 

G3, Trent 1000–H3, Trent 1000–J3, 

Trent 1000–K3, Trent 1000–L3, Trent 

1000–M3, Trent 1000–N3, Trent 1000– 

P3, Trent 1000–Q3, and Trent 1000–R3 

engines. This proposed AD was 

prompted by a determination that 

certain intervals for visual inspection of 

the intermediate-pressure stage 8 (IP8) 

and high-pressure stage 3 (HP3) air 

transfer tubes and front bearing housing 

IP8 air feed tubes need to be reduced. 

This proposed AD would require initial 

and repetitive visual inspections of the 

IP8 and HP3 air transfer tubes and front 

bearing housing IP8 air feed tubes for 

cracking, damage, or air leakage wear, 

and replacement, if necessary, as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

proposed for incorporation by reference 

(IBR). The FAA is proposing this AD to 

address the unsafe condition on these 

products. 


lotter on DSK11XQN23PROD with PROPOSALS1
67122 Federal Register / Vol. 88, No. 188 / Friday, September 29, 2023 / Proposed Rules 

DATES: The FAA must receive comments 

on this NPRM by November 13, 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–2023–1892; 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 that is 

identified in this NPRM, contact EASA, 

Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; phone: +49 221 8999 

000; email: ADs@easa.europa.eu; 

website: easa.europa.eu. You may find 

this material on the EASA website at 

ad.easa.europa.eu. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1892. 

• You may view this 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. 

FOR FURTHER INFORMATION CONTACT: 

Sungmo Cho, Aviation Safety Engineer, 

FAA, 2200 South 216th Street, Des 

Moines, WA 98198; phone: (781) 238– 

7241; email: sungmo.d.cho@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–2023–1892; Project Identifier 

MCAI–2023–00626–E’’ at the beginning 

of your comments. The most helpful 

comments reference a specific portion of 

the proposal, explain the reason for any 

recommended change, and include 

supporting data. The FAA will consider 

all comments received by the closing 

date and may amend this proposal 

because of those comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in 14 CFR 

11.35, the FAA will post all comments 

received, without change, to 

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 Sungmo Cho, Aviation 

Safety Engineer, FAA, 2200 South 216th 

Street, Des Moines, WA 98198. Any 

commentary that the FAA receives 

which is not specifically designated as 

CBI will be placed in the public docket 

for this rulemaking. 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2023–0087, 

dated April 26, 2023 (EASA AD 2023– 

0087) (also referred to after this as the 

MCAI), to address an unsafe condition 

for all RRD Model Trent 1000–AE3, 

Trent 1000–CE3, Trent 1000–D3, Trent 

1000–G3, Trent 1000–H3, Trent 1000– 

J3, Trent 1000–K3, Trent 1000–L3, Trent 

1000–M3, Trent 1000–N3, Trent 1000– 

P3, Trent 1000–Q3, and Trent 1000–R3 

engines. The MCAI states that the RRD 

engine time limits manual (TLM) 

provides instructions for visual 

inspection of the IP8 and HP3 air 

transfer tubes and front bearing housing 

IP8 air feed tubes for cracking, damage, 

or air leakage wear at intervals 

consistent with critical part life 

assessments. Also, certain inspection 

intervals mandated by the MCAI, and 

not previously included in the TLM, are 

shorter than the engine shop visit 

intervals. Thus, more frequent visual 

inspections of the IP8 and HP3 air 

transfer tubes and front bearing housing 

IP8 air feed tubes are necessary. The 

manufacturer issued service information 

that provides instructions for visual 

inspections of the IP8 and HP3 air 

transfer tubes and front bearing housing 

IP8 air feed tubes. This condition, if not 

addressed, could affect the engine 

internal cooling and sealing flows, 

resulting in failure of the IP8 air transfer 

tubes, HP3 air transfer tubes, and front 

bearing housing IP8 air feed tubes, with 

consequent damage to the engine and 

reduced control of the airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1892. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed EASA AD 2023– 

0087, which specifies procedures for 

performing initial and repetitive visual 

inspections of the IP8 and HP3 air 

transfer tubes and front bearing housing 

IP8 air feed tubes for cracking, damage, 

or air leakage wear, and replacement if 

necessary. 

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 ADDRESSES. 

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 NPRM 

after determining that 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 MCAI described previously, except 

for any differences identified as 

exceptions in the regulatory text of this 

proposed AD. 

Explanation of Required Compliance 

Information 

In the FAA’s ongoing efforts to 

improve the efficiency of the AD 

process, the FAA developed a process to 

use some civil aviation authority (CAA) 

ADs as the primary source of 

information for compliance with 

requirements for corresponding FAA 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 88, No. 188 / Friday, September 29, 2023 / Proposed Rules 67123 

ADs. The FAA has since coordinated 

with other manufacturers and CAAs to 

use this process. As a result, the FAA 

proposes to incorporate by reference 

EASA AD 2023–0087 in the FAA final 

rule. This proposed AD would, 

therefore, require compliance with 

EASA AD 2023–0087 in its entirety 

through that incorporation, except for 

any differences identified as exceptions 

in the regulatory text of this proposed 

AD. Using common terms that are the 

same as the heading of a particular 

section in the EASA AD does not mean 

that operators need comply only with 

that section. For example, where the AD 

requirement refers to ‘‘all required 

actions within the compliance times,’’ 

compliance with this AD requirement is 

not limited to the section titled 

‘‘Required Action(s) and Compliance 

Time(s)’’ in EASA AD 2023–0087. 

Service information required by the 

EASA AD for compliance will be 

available at regulations.gov by searching 

for and locating Docket No. FAA–2023– 

1892 after the FAA final rule is 

published. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 16 

engines installed on airplanes of U.S. 

registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspection of air tubes .................................... 3 work-hours x $85 per hour = $255 ............. $0 $255 $4,080 

The FAA estimates the following 

costs to do any necessary replacements 

that would be required based on the 

results of the proposed inspection. The 

agency has no way of determining the 

number of aircraft that might need these 

replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace IP8 air transfer tubes ..................................... 2 work-hours × $85 per hour = $170 ........................... $7,600 $7,770 

Replace HP3 air transfer tubes .................................... 2 work-hours × $85 per hour = $170 ........................... 11,900 12,070 

Replace front bearing housing IP8 air feed tubes ....... 2 work-hours × $85 per hour = $170 ........................... 10,000 10,170 

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: 

Rolls-Royce Deutschland Ltd & Co KG: 

Docket No. FAA–2023–1892; Project 

Identifier MCAI–2023–00626–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by November 

13, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG Model Trent 1000– 

AE3, Trent 1000–CE3, Trent 1000–D3, Trent 

1000–G3, Trent 1000–H3, Trent 1000–J3, 

Trent 1000–K3, Trent 1000–L3, Trent 1000– 

M3, Trent 1000–N3, Trent 1000–P3, Trent 

1000–Q3, and Trent 1000–R3 engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7500, Engine Bleed Air System. 

(e) Unsafe Condition 

This AD was prompted by a determination 

that certain intervals for visual inspection of 

the intermediate-pressure stage 8 (IP8) air 

transfer tubes, high-pressure stage 3 (HP3) air 

transfer tubes, and front bearing housing IP8 

air feed tubes need to be reduced. The FAA 

is issuing this AD to prevent failure of the IP8 

and HP3 air transfer tubes and front bearing 


lotter on DSK11XQN23PROD with PROPOSALS1
67124 Federal Register / Vol. 88, No. 188 / Friday, September 29, 2023 / Proposed Rules 

housing IP8 air feed tubes. The unsafe 

condition, if not addressed, could affect the 

engine internal cooling and sealing flows, 

resulting in failure of the IP8 air transfer 

tubes, HP3 air transfer tubes, and front 

bearing housing IP8 air feed tubes, with 

consequent damage to the engine and 

reduced control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Except as specified in paragraph (h) of this 

AD: Perform all required actions within the 

compliance times specified in, and in 

accordance with, European Union Aviation 

Safety Agency (EASA) AD 2023–0087, dated 

April 26, 2023 (EASA AD 2023–0087). 

(h) Exceptions to EASA AD 2023–0087 

(1) Where EASA AD 2023–0087 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) This AD does not adopt the Remarks 

paragraph of EASA AD 2023–0087. 

(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 local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the AIR–520, Continued 

Operational Safety Branch, send it to the 

attention of the person identified in 

paragraph (j) of this AD and email to: ANEAD-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) Additional Information 

For more information about this AD, 

contact Sungmo Cho, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, Des 

Moines, WA 98198; phone: (781) 238–7241; 

email: sungmo.d.cho@faa.gov. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 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) European Union Aviation Safety Agency 

(EASA) AD 2023–0087, dated April 26, 2023. 

(ii) [Reserved] 

(3) For EASA AD 2023–0087, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; phone: +49 221 8999 000; 

email: ADs@easa.europa.eu; website: 

easa.europa.eu. You may find this material 

on the EASA website at ad.easa.europa.eu. 

(4) You may view this 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. 

(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, 

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

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

Issued on September 25, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–21471 Filed 9–28–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2023–1801; Airspace 

Docket No. 23–AAL–33] 

RIN 2120–AA66 

Modification of Class E Airspace; 

Klawock Airport, Klawock, AK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

modify the Class E airspace extending 

upward from 700 feet above the surface 

and remove the Class E airspace 

extending upward from 1200 feet above 

the surface at Klawock Airport, 

Klawock, AK. Additionally, this action 

proposes administrative amendments to 

update the airport’s existing Class E 

airspace legal description. These actions 

would support the safety and 

management of instrument flight rules 

(IFR) operations at the airport. 

DATES: Comments must be received on 

or before November 13, 2023. 

ADDRESSES: Send comments identified 

by FAA Docket No. FAA–2023–1801 

and Airspace Docket No. 23–AAL–33 

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 

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: 

Nathan A. Chaffman, Federal Aviation 

Administration, Western Service Center, 

Operations Support Group, 2200 S. 

216th Street, Des Moines, WA 98198; 

telephone (206) 231–3460. 

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 

modify Class E airspace to support IFR 

operations at Klawock Airport, 

Klawock, AK. 

Comments Invited 

The FAA invites interested persons to 

participate in this rulemaking by 

submitting written comments, data, or 

views. Comments are specifically 

invited on the overall regulatory, 

aeronautical, economic, environmental, 

and energy-related aspects of the 

proposal. The most helpful comments 

reference a specific portion of the 

proposal, explain the reason for any 


lotter on DSK11XQN23PROD with PROPOSALS1