5756 Federal Register / Vol. 90, No. 11 / Friday, January 17, 2025 / Proposed Rules 

paragraph (g)(1) of this AD can be found in 

Boeing Special Attention Service Bulletin 

757–25–0320, dated January 19, 2024, which 

is referred to in Boeing Special Attention 

Requirements Bulletin 757–25–0320 RB, 

dated January 19, 2024. 

(2) For airplanes identified in Boeing 

Special Attention Requirements Bulletin 

757–25–0321 RB, dated January 19, 2024: 

Except as specified by paragraph (h) of this 

AD, at the applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Special 

Attention Requirements Bulletin 757–25– 

0321 RB, January 19, 2024, do all applicable 

actions identified in, and in accordance with, 

the Accomplishment Instructions of Boeing 

Special Attention Requirements Bulletin 

757–25–0321 RB, dated January 19, 2024. 

Note 2 to paragraph (g)(2): Guidance for 

accomplishing the actions required by 

paragraph (g)(2) of this AD can be found in 

Boeing Special Attention Service Bulletin 

757–25–0321, dated January 19, 2024, which 

is referred to in Boeing Special Attention 

Requirements Bulletin 757–25–0321 RB, 

dated January 19, 2024. 

(3) For airplanes not identified in 

paragraph (g)(1) or (2) of this AD: Within 60 

months after the effective date of this AD, 

replace all PSU-mounted video monitors that 

do not have secondary retention lanyards 

with PSU-mounted video monitors that have 

secondary retention lanyards, using a method 

approved in accordance with the procedures 

specified in paragraph (i) of this AD. 

(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 757–25–0320 RB, dated January 19, 

2024, refers to the original issue date of 

Requirements Bulletin 757–25–0320 RB, this 

AD requires using the effective date of this 

AD. 

(2) Where the Compliance Time columns 

of the tables in the ‘‘Compliance’’ paragraph 

of Boeing Special Attention Requirements 

Bulletin 757–25–0321 RB, dated January 19, 

2024, refers to the original issue date of 

Requirements Bulletin 757–25–0321 RB, this 

AD requires using the effective date of this 

AD. 

(3) Where Boeing Special Attention 

Requirements Bulletins 757–25–0320 RB and 

757–25–0321 RB, both dated January 19, 

2024, specify contacting Boeing for 

alternative installation instructions and 

doing the installation: This AD requires 

doing the installation 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: AMOC@

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 Julie Linn, Aviation Safety Engineer, 

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

98198; phone: 206–231–3584; email: 

julie.linn@faa.gov. 

(2) Material identified in this AD that is not 

incorporated by reference is available at the 

address specified in paragraph (k)(3) this AD. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the material listed in this paragraph 

under 5 U.S.C. 552(a) and 1 CFR part 51. 

(2) You must use this material as 

applicable to do the actions required by this 

AD, unless the AD specifies otherwise. 

(i) Boeing Special Attention Requirements 

Bulletin 757–25–0320 RB, dated January 19, 

2024. 

(ii) Boeing Special Attention Requirements 

Bulletin 757–25–0321 RB dated January 19, 

2024. 

(3) For Boeing material 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; website myboeingfleet.com. 

(4) You may view this material 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 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 January 8, 2025. 

Suzanne Masterson, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2025–00826 Filed 1–16–25; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2025–0005; Project 

Identifier AD–2024–00646–T] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain The Boeing Company Model 

787–8, 787–9, and 787–10 airplanes. 

This proposed AD was prompted by 

reports of multiple supplier notices of 

escapement (NOEs) indicating that seat 

track splice fittings were possibly 

manufactured with an incorrect 

titanium alloy material. This proposed 

AD would require an inspection of seat 

track splice fittings to determine the 

material and applicable on-condition 

actions. The FAA is proposing this AD 

to address the unsafe condition on these 

products. 

DATES: The FAA must receive comments 

on this proposed AD by March 3, 2025. 

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–2025–0005; 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. 

Material Incorporated by Reference: 

• For the Boeing material identified 

in this proposed AD, contact Boeing 

Commercial Airplanes, Attention: 

Contractual & Data Services (C&DS), 

2600 Westminster Blvd., MC 110–SK57, 


KHAMMOND on DSK9W7S144PROD with PROPOSALS
Federal Register / Vol. 90, No. 11 / Friday, January 17, 2025 / Proposed Rules 5757 

Seal Beach, CA 90740–5600; telephone 

562–797–1717; website 

myboeingfleet.com. 

• You may view this material 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. 

It is also available at regulations.gov 

under Docket No. FAA–2025–0005. 

FOR FURTHER INFORMATION CONTACT: 

Joseph Hodgin, Aviation Safety 

Engineer, FAA, 2200 South 216th St., 

Des Moines, WA 98198; phone: 206– 

231–3962; email: Joseph.J.Hodgin@

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 the ADDRESSES section. Include 

‘‘Docket No. FAA–2025–0005; Project 

Identifier AD–2024–00646–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 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 Joseph Hodgin, 

Aviation Safety Engineer, FAA, 2200 

South 216th St., Des Moines, WA 98198; 

phone: 206–231–3962; email: 

Joseph.J.Hodgin@faa.gov. Any 

commentary that the FAA receives that 

is not specifically designated as CBI will 

be placed in the public docket for this 

rulemaking. 

Background 

The FAA received reports of multiple 

supplier NOEs indicating that seat track 

splice fittings were possibly 

manufactured with an incorrect 

titanium alloy material. The titanium 

material that was possibly used is a 

Grade 1 or 2 commercially pure 

unalloyed titanium, which has 

significantly reduced strength, fatigue, 

and damage tolerance properties 

compared to the type design Grade 5 Ti6Al-4V alloy material. This condition, if 

not addressed, could result in failure of 

the seat track splice fittings, and could 

result in serious injury to seated 

occupants as a result of adverse effects 

on emergency egress and structural 

capability to react to emergency landing 

loads. 

FAA’s Determination 

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. 

Material Incorporated by Reference 

Under 1 CFR Part 51 

The FAA reviewed Boeing Alert 

Requirements Bulletin B787–81205– 

SB530086–00 RB, Issue 001, dated 

October 18, 2024. This material 

specifies procedures for an X-ray 

fluorescence spectrometer inspection or 

a high frequency eddy current 

inspection of seat track splice fittings to 

determine the material and applicable 

on-condition actions. On-condition 

actions include replacing affected seat 

track splice fittings with new seat track 

splice fittings at affected locations. 

This material 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. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

accomplishing the actions specified in 

the material already described, except 

for any differences identified as 

exceptions in the regulatory text of this 

proposed AD. For information on the 

procedures and compliance times, see 

this material at regulations.gov under 

Docket No. FAA–2025–0005. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 37 

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 ................................ 16 work-hours × $85 per hour = $1,360 ................................ $0 $1,360 $50,320 

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 this 

replacement: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per product 

Replacement ........................ Up to 20 work-hours × $85 per hour = $1,700 ............. Up to $4,140 ...................... Up to $5,840 (per location, 

up to 20 locations per 

airplane). 


KHAMMOND on DSK9W7S144PROD with PROPOSALS
5758 Federal Register / Vol. 90, No. 11 / Friday, January 17, 2025 / Proposed Rules 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some or all 

of the costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

operators. 

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: 

The Boeing Company: Docket No. FAA– 

2025–0005; Project Identifier AD–2024– 

00646–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by March 3, 

2025. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 787–8, 787–9, and 787–10 airplanes, 

certificated in any category, as identified in 

Boeing Alert Requirements Bulletin B787– 

81205–SB530086–00 RB, Issue 001, dated 

October 18, 2024. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by reports of 

multiple supplier notices of escapement 

(NOEs) indicating that seat track splice 

fittings were possibly manufactured with an 

incorrect titanium alloy material. The unsafe 

condition, if not addressed, could result in 

failure of the seat track splice fittings, and 

could result in serious injury to seated 

occupants as a result of adverse effects on 

emergency egress and structural capability to 

react to emergency landing loads. 

(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 Alert 

Requirements Bulletin B787–81205– 

SB530086–00 RB, Issue 001, dated October 

18, 2024, do all applicable actions identified 

in, and in accordance with, the 

Accomplishment Instructions of Boeing Alert 

Requirements Bulletin B787–81205– 

SB530086–00 RB, Issue 001, dated October 

18, 2024. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin B787–81205–SB530086–00, Issue 

001, dated October 18, 2024, which is 

referred to in Boeing Alert Requirements 

Bulletin B787–81205–SB530086–00 RB, Issue 

001, dated October 18, 2024. 

(h) Exceptions to Requirements Bulletin 

Specifications 

Where the Compliance Time column of the 

table in the ‘‘Compliance’’ paragraph of 

Boeing Alert Requirements Bulletin B787– 

81205–SB530086–00 RB, Issue 001, dated 

October 18, 2024, refers to the Issue 001 date 

of Requirements Bulletin B787–81205– 

SB530086–00 RB, this AD requires using the 

effective date 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: AMOC@

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 Joseph Hodgin, Aviation Safety 

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

Moines, WA 98198; phone: 206–231–3962; 

email: Joseph.J.Hodgin@faa.gov. 

(2) Material identified in this AD that is not 

incorporated by reference is available at the 

address specified in paragraph (k)(3) this AD. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

the material listed in this paragraph under 5 

U.S.C. 552(a) and 1 CFR part 51. 

(2) You must use this material as 

applicable to do the actions required by this 

AD, unless the AD specifies otherwise. 

(i) Boeing Alert Requirements Bulletin 

B787–81205–SB530086–00 RB, Issue 001, 

dated October 18, 2024. 

(ii) [Reserved] 

(3) For the material 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; website myboeingfleet.com. 

(4) You may view this material at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 


KHAMMOND on DSK9W7S144PROD with PROPOSALS
Federal Register / Vol. 90, No. 11 / Friday, January 17, 2025 / Proposed Rules 5759 

availability of this material at the FAA, call 

206–231–3195. 

(5) 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 January 8, 2025. 

Suzanne Masterson, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2025–00824 Filed 1–16–25; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2025–0006; Project 

Identifier MCAI–2023–00803–R] 

RIN 2120–AA64 

Airworthiness Directives; Airbus 

Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

Airbus Helicopters Model AS350B, 

AS350BA, AS350B1, AS350B2, 

AS350B3, AS350D, AS355E, AS355F, 

AS355F1, AS355F2, AS355N, and 

AS355NP helicopters. This proposed 

AD was prompted by a report of a 

sliding door that was locked in the open 

position detaching from the helicopter 

during flight. This proposed AD would 

require modifying certain upper rail 

rollers, installing a label on each sliding 

door, and prohibit installing affected 

upper rail rollers or a door having an 

affected upper rail roller. These actions 

are specified in a European Union 

Aviation Safety Agency (EASA) AD, 

which is proposed for incorporation by 

reference. The FAA is proposing this 

AD to address the unsafe condition on 

these products. 

DATES: The FAA must receive comments 

on this NPRM by March 3, 2025. 

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–2025–0006; 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 EASA material identified in this 

proposed AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, 

Germany; phone: +49 221 8999 000; 

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

easa.europa.eu. You may find the EASA 

material on the EASA website at 

ad.easa.europa.eu. 

• You may view this material at the 

FAA, Office of the Regional Counsel, 

Southwest Region, 10101 Hillwood 

Parkway, Room 6N–321, Fort Worth, TX 

76177. For information on the 

availability of this material at the FAA, 

call (817) 222–5110. The EASA material 

is also available at regulations.gov under 

Docket No. FAA–2025–0006. 

FOR FURTHER INFORMATION CONTACT: 

Adam Hein, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; phone: (316) 946– 

4116; email: Adam.Hein@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 the ADDRESSES section. Include 

‘‘Docket No. FAA–2025–0006; Project 

Identifier MCAI–2023–00803–R’’ 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 Adam Hein, Aviation 

Safety Engineer, FAA, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 

11590; phone: (316) 946–4116; email: 

Adam.Hein@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 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2023–0131, 

dated July 3, 2023 (EASA AD 2023– 

0131) (also referred to as the MCAI), to 

correct an unsafe condition on Airbus 

Helicopters Model AS 350 B, AS 350 D, 

AS 350 BA, AS 350 BB, AS 350 B1, AS 

350 B2, AS 350 B3, AS 355 E, AS 355 

F, AS 355 F1, AS 355 F2, AS 355 N, and 

AS 355 NP helicopters if equipped with 

a left-hand (LH) and/or right-hand 

sliding door. The MCAI states that a LH 

sliding door of a Model AS 350 

B3helicopter was lost while flying with 

the door locked in the open position. 

Design review determined that the 

upper rail roller had a single locking 

device instead of two separate locking 

devices, which is required for that type 

of fastener. 

This proposed AD would apply to 

Model AS350B, AS350BA, AS350B1, 

AS350B2, AS350D, AS355E, AS355F, 

AS355F1, AS355F2, AS355N, and 

AS355NP helicopters because they are 

also affected by this unsafe condition 

due to design similarity. 

The FAA is proposing this AD to 

address the insufficient upper rail roller 

locking mechanism of the sliding door. 

The unsafe condition, if not addressed, 

could lead to the sliding door detaching 

from the helicopter during flight, and 


KHAMMOND on DSK9W7S144PROD with PROPOSALS