This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

9403 

Vol. 90, No. 28 

Wednesday, February 12, 2025 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2025–0196; Project 

Identifier AD–2024–00250–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 

supersede Airworthiness Directive (AD) 

2019–12–13, which applies to all The 

Boeing Company Model 757 airplanes. 

AD 2019–12–13 requires repetitive 

checks of the aileron trim actuator 

bearing for free rotation, repetitive 

detailed inspections of the aileron trim 

actuator attachment lug for damage and 

cracking, and applicable on-condition 

actions. Since the FAA issued AD 2019– 

12–13, the FAA has determined that a 

modification must be done to address 

the unsafe condition. This proposed AD 

would continue to require the actions in 

AD 2019–12–13. This proposed AD 

would also require for certain airplanes 

changing the lateral control box support 

assembly and installing an aileron trim 

actuator bracket, and for certain other 

airplanes replacing the existing actuator 

lateral control fitting with an aileron 

trim actuator bracket, which terminates 

the repetitive checks and inspections. 

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 31, 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–2025–0196; 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 material identified in this 

proposed 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. 

• 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–2025–0196. 

FOR FURTHER INFORMATION CONTACT: 

Katherine Venegas, Aviation Safety 

Engineer, FAA, 2200 South 216th St., 

Des Moines, WA 98198; phone: 562– 

627–5353; email: katherine.venegas@

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–2025–0196; Project 

Identifier AD–2024–00250–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 Katherine Venegas, 

Aviation Safety Engineer, FAA, 2200 

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

phone: 562–627–5353; email: 

katherine.venegas@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 issued AD 2019–12–13, 

Amendment 39–19668 (84 FR 30577, 

June 27, 2019) (AD 2019–12–13), for all 

Boeing 757 airplanes. AD 2019–12–13 

was prompted by a report of the failure 

of the aileron trim actuator attachment 

lug. AD 2019–12–13 requires repetitive 

checks of the aileron trim actuator 

bearing for free rotation, repetitive 

detailed inspections of the aileron trim 

actuator attachment lug for damage and 

cracking, and applicable on-condition 

actions. The agency issued AD 2019– 

12–13 to address failure of the aileron 

trim actuator attachment lug and 

subsequent loss of feel force, wheel 

centering, and lateral trim, which, if not 

corrected, could cause over-control of 


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9404 Federal Register / Vol. 90, No. 28 / Wednesday, February 12, 2025 / Proposed Rules 

the airplane and subsequent lateral 

pilot-induced oscillations that could 

adversely affect continued safe flight 

and landing. 

Actions Since AD 2019–12–13 Was 

Issued 

Since the FAA issued AD 2019–12– 

13, the FAA has determined that a 

modification must be done to address 

the unsafe condition. The preamble to 

AD 2019–12–13 specifies that the FAA 

considers that AD ‘‘interim action’’ and 

that the FAA might consider further 

rulemaking if a modification is 

developed, approved, and available. The 

manufacturer has since developed such 

a modification, which would terminate 

the repetitive inspections required by 

AD 2019–12–13. 

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 757–27A0159 

RB, Revision 1, dated April 29, 2020. 

This material describes procedures for 

repetitive checks of the aileron trim 

actuator bearing for free rotation, 

repetitive detailed inspections of the 

aileron trim actuator attachment lug for 

damage or cracking, and applicable oncondition actions. On-condition actions 

include high frequency eddy current 

(HFEC) inspections of the aileron trim 

actuator attachment lug for cracking, 

repair, and replacement. This revision 

only adds references to AD 2019–12–13 

and does not add any new actions. 

The FAA also reviewed Boeing Alert 

Requirements Bulletin 757–27A0160 

RB, dated April 1, 2024. This material 

specifies procedures for modifying the 

affected airplanes, which includes for 

certain airplanes changing the lateral 

control box support assembly (which 

includes doing a portable method C 

penetrant inspection of the machined 

surface of the lug for any crack, and 

repair as applicable) and installing an 

aileron trim actuator bracket, and for 

certain other airplanes replacing the 

existing actuator lateral control fitting 

with an aileron trim actuator bracket. 

Accomplishment of the modification 

terminates the repetitive checks and 

inspections specified in Boeing Alert 

Requirements Bulletin 757–27A0159 

RB. 

This proposed AD would also require 

Boeing Alert Requirements Bulletin 

757–27A0159 RB, dated March 29, 

2019, which the Director of the Federal 

Register approved for incorporation by 

reference as of July 12, 2019 (84 FR 

30577, June 27, 2019). 

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 retain all of 

the requirements of AD 2019–12–13 and 

would refer to Boeing Alert 

Requirements Bulletin 757–27A0159 

RB, Revision 1, dated April 29, 2020, as 

the appropriate source of service 

information for accomplishing the 

retained actions. 

This proposed AD would also require 

doing the actions described in Boeing 

Alert Requirements Bulletin 757– 

27A0160 RB, dated April 1, 2024, above, 

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–2025–0196. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 460 

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 

Repetitive inspections (retained actions 

from AD 2019-12-13).

3 work-hours × $85 per hour = $255 

per inspection cycle.

$0 $255 per inspection 

cycle.

$117,300 per inspection cycle. 

Install aileron trim actuator bracket 

(new proposed action).

6 work-hours × $85 per hour = $510 3,820 $4,330 ........................ $1,991,800. 

Change the lateral control box assembly for Groups 1, 4, and 5 (new proposed action).2 work-hours × $85 per hour = $170 0 $170 ........................... $69,020.* 

* The number of airplanes in Groups 1, 4, and 5, as identified in Boeing Alert Requirements Bulletin 757–27A0160 RB, dated April 1, 2024, is 

estimated to be 406. 

The FAA estimates the following 

costs to do any necessary on-condition 

actions 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 on-condition actions: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replacement (retained actions from AD 2019-12-13) 4 work-hours × $85 per hour = $340 ........................... $17,693 $18,033 

HFEC inspection (retained actions from AD 

2019-12-13).

1 work-hour × $85 per hour = $85 ............................... 0 85 

The FAA has received no definitive 

data on which to base the cost estimates 

for the on-condition repair specified in 

this proposed AD. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 


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Federal Register / Vol. 90, No. 28 / Wednesday, February 12, 2025 / Proposed Rules 9405 

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: 

■ a. Removing Airworthiness Directive 

(AD) 2019–12–13, Amendment 39– 

19668 (84 FR 30577, June 27, 2019), and 

■ b. Adding the following new AD: 

The Boeing Company: Docket No. FAA– 

2025–0196; Project Identifier AD–2024– 

00250–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by March 31, 

2025. 

(b) Affected ADs 

This AD replaces AD 2019–12–13, 

Amendment 39–19668 (84 FR 30577, June 

27, 2019) (AD 2019–12–13). 

(c) Applicability 

This AD applies to all The Boeing 

Company Model 757–200, –200CB, –200PF, 

and –300 series airplanes, certificated in any 

category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27, Flight controls. 

(e) Unsafe Condition 

This AD was prompted by a report of the 

failure of the aileron trim actuator attachment 

lug. The FAA is issuing this AD to address 

failure of the aileron trim actuator attachment 

lug and subsequent loss of feel force, wheel 

centering, and lateral trim. The unsafe 

condition, if not corrected, could cause overcontrol of the airplane and subsequent lateral 

pilot-induced oscillations, which could 

adversely affect continued safe flight and 

landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Required Actions, With Revised 

Service Information 

This paragraph restates the requirements of 

paragraph (g) of AD 2019–12–13, with 

revised service information. Except as 

specified by paragraph (h) of this AD: At the 

applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Alert 

Requirements Bulletin 757–27A0159 RB, 

Revision 1, dated April 29, 2020, do all 

applicable actions identified in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Alert Requirements 

Bulletin 757–27A0159 RB, dated March 29, 

2019, or Boeing Alert Requirements Bulletin 

757–27A0159 RB, Revision 1, dated April 29, 

2020. As of the effective date of this AD, only 

use Boeing Alert Requirements Bulletin 757– 

27A0159 RB, Revision 1, dated April 29, 

2020, for the actions required by this 

paragraph. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 757–27A0159, dated March 29, 

2019, which is referred to in Boeing Alert 

Requirements Bulletin 757–27A0159 RB, 

dated March 29, 2019. 

Note 2 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can also be found in Boeing Alert Service 

Bulletin 757–27A0159, Revision 1, dated 

April 29, 2020, which is referred to in Boeing 

Alert Requirements Bulletin 757–27A0159 

RB, Revision 1, dated April 29, 2020. 

(h) Retained Exception, With Revised 

Service Information 

This paragraph restates the requirements of 

paragraph (h)(2) of AD 2019–12–13, with 

revised service information. Where Boeing 

Alert Requirements Bulletin 757–27A0159 

RB, dated March 29, 2019, and Boeing Alert 

Requirements Bulletin 757–27A0159 RB, 

Revision 1, dated April 29, 2020, specify 

contacting Boeing for repair instructions: 

This AD requires doing the repair using a 

method approved in accordance with the 

procedures specified in paragraph (k) of this 

AD. 

(i) New Required Actions 

Except as specified by paragraph (j) of this 

AD: At the applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Alert 

Requirements Bulletin 757–27A0160 RB, 

dated April 1, 2024, do all applicable actions 

identified in, and in accordance with, the 

Accomplishment Instructions of Boeing Alert 

Requirements Bulletin 757–27A0160 RB, 

dated April 1, 2024. Doing the modification 

required in this paragraph terminates the 

inspections required by paragraph (g) of this 

AD. 

Note 3 to paragraph (i): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 757–27A0160, dated April 1, 2024, 

which is referred to in Boeing Alert 

Requirements Bulletin 757–27A0160 RB, 

dated April 1, 2024. 

(j) Exceptions to Requirements Bulletin 

Specifications 

(1) Where the Compliance Time columns 

of the tables in the ‘‘Compliance’’ paragraph 

of Boeing Alert Requirements Bulletin 757– 

27A0160 RB, dated April 1, 2024, refer to the 

original issue date of Requirements Bulletin 

757–27A0160 RB, this AD requires using the 

effective date of this AD. 

(2) Where Boeing Alert Requirements 

Bulletin 757–27A0160 RB, dated April 1, 

2024, specifies contacting Boeing for repair 

instructions: This AD requires doing the 

repair using a method approved in 

accordance with the procedures specified in 

paragraph (k) of this AD. 

(k) 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 (l)(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 


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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. 

(4) AMOCs approved for AD 2019–12–13 

are approved as AMOCs for the 

corresponding provisions of paragraph (g) of 

this AD. 

(l) Related Information 

(1) For more information about this AD, 

contact Katherine Venegas, Aviation Safety 

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

Moines, WA 98198; phone: 562–627–5353; 

email: katherine.venegas@faa.gov. 

(2) Material identified in this AD that is not 

incorporated by reference is available at the 

address specified in paragraph (m)(5) of this 

AD. 

(m) 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 this AD specifies otherwise. 

(3) The following material was approved 

for IBR on [DATE 35 DAYS AFTER 

PUBLICATION OF THE FINAL RULE]. 

(i) Boeing Alert Requirements Bulletin 

757–27A0159 RB, Revision 1, dated April 29, 

2020. 

(ii) Boeing Alert Requirements Bulletin 

757–27A0160 RB, dated March 29, 2024. 

(4) The following material was approved 

for IBR on July 12, 2019 (84 FR 30577, June 

27, 2019). 

(i) Boeing Alert Requirements Bulletin 

757–27A0159 RB, dated March 29, 2019. 

(ii) [Reserved] 

(5) 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. 

(6) 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. 

(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 February 3, 2025. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2025–02316 Filed 2–11–25; 8:45 am] 

BILLING CODE 4910–13–P 


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