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

73003 

Vol. 89, No. 174 

Monday, September 9, 2024 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2136; Project 

Identifier AD–2023–00296–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) 

2019–14–13, which applies to all The 

Boeing Company Model 767–200, –300, 

–300F, and –400ER series airplanes. AD 

2019–14–13 was prompted by reports of 

uncommanded fore and aft movement of 

the Captain’s and First Officer’s seats. 

AD 2019–14–13 requires identifying the 

part number, and the serial number if 

applicable, of the Captain’s and First 

Officer’s seats, and applicable oncondition actions for affected seats. AD 

2019–14–13 also requires a one-time 

detailed inspection and repetitive 

checks of the horizontal movement 

system (HMS) of the Captain’s and First 

Officer’s seats, and applicable oncondition actions. AD 2019–14–13 also 

provides an optional terminating action 

for the repetitive actions for certain 

seats. Since the FAA issued AD 2019– 

14–13, the FAA has determined that 

additional seats are affected by the 

unsafe condition. This proposed AD 

would retain the actions required by AD 

2019–14–13 and adds an inspection of 

previously omitted part numbers. 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 October 24, 

2024. 

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–2024–2136; 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 Boeing material identified in 

this proposed AD, contact Boeing 

Commercial Airplanes, Attention: 

Contractual & Data Services (C&DS), 

2600 Westminster Boulevard, MC 110– 

SK57, Seal Beach, CA 90740–5600; 

phone 562–797–1717; website 

myboeingfleet.com. 

• You may view this material 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. 

It is also available at regulations.gov by 

searching for and locating Docket No. 

FAA–2024–2136. 

FOR FURTHER INFORMATION CONTACT: 

Courtney Tuck, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, 

Des Moines, WA 98198; phone 206– 

231–3986; email Courtney.K.Tuck@

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–2024–2136; Project Identifier AD– 

2023–00296–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 Courtney Tuck, 

Aviation Safety Engineer, FAA, 2200 

South 216th Street, Des Moines, WA 

98198; phone 206–231–3986; email 

Courtney.K.Tuck@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 2019–14–13, 

Amendment 39–19691 (84 FR 38855, 

August 8, 2019) (AD 2019–14–13), for 

all The Boeing Company Model 767– 

200, –300, –300F, and –400ER series 

airplanes. AD 2019–14–13 was 

prompted by reports of uncommanded 

fore and aft movement of the Captain’s 

and First Officer’s seats. AD 2019–14–13 

requires an identification of the part 

number, and if applicable the serial 

number, of the Captain’s and First 

Officer’s seats, and applicable oncondition actions. AD 2019–14–13 also 

requires a one-time detailed inspection 

and repetitive checks of the HMS of the 


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73004 Federal Register / Vol. 89, No. 174 / Monday, September 9, 2024 / Proposed Rules 

Captain’s and First Officer’s seats, and 

applicable on-condition actions. AD 

2019–14–13 also provides an optional 

terminating action for the repetitive 

checks of the HMS for certain airplanes. 

The FAA issued AD 2019–14–13 to 

address uncommanded fore and aft 

movement of the Captain’s and First 

Officer’s seats. An uncommanded fore 

or aft seat movement during a critical 

part of a flight, such as takeoff or 

landing, could cause a flight control 

obstruction or unintended flight control 

input, which could result in the loss of 

the ability to control the airplane. 

Actions Since AD 2019–14–13 Was 

Issued 

Since the FAA issued AD 2019–14– 

13, Boeing and the seat supplier (Ipeco) 

determined that certain seat part 

numbers were inadvertently omitted 

from the service information required by 

AD 2019–14–13. Ipeco subsequently 

updated their service information to 

include the additional part numbers, 

and Boeing updated their service 

information as well. Based on this, the 

FAA has determined that additional 

seats are affected by the unsafe 

condition. 

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 Special 

Attention Service Bulletin 767–25– 

0539, Revision 2, dated January 27, 

2023. This material describes 

procedures for identification of the part 

number, and the serial number if 

applicable, of the Captain’s and First 

Officer’s seats, and applicable oncondition actions. On-condition actions 

include an inspection of each seat’s fore 

and aft and vertical manual control 

levers for looseness, installation of 

serviceable seats, and a seat operational 

test after any cable adjustment. This 

material also adds Ipeco seat part 

numbers 3A258–0007–01–1Z, 3A258– 

0008–01–1Z, 3A258–0041–01–1Z, 

3A258–0042–01–1Z, and 3A090–0078– 

04–1. This material also adds Ipeco seat 

part numbers 3A090–0078–03–1 and 

3A090–0078–05–1, that were previously 

removed in Boeing Special Attention 

Service Bulletin 767–25–0539, Revision 

1, dated January 9, 2014. 

The FAA also reviewed Boeing 

Special Attention Service Bulletin 767– 

25–0549, Revision 2, dated January 27, 

2023. This material describes 

procedures for a detailed inspection and 

repetitive checks of the HMS (including 

for any Artus part and amendment 

numbers of the horizontal actuator of 

the HMS) for the Captain’s and First 

Officer’s seats for findings (e.g., 

evidence of cracks, scores, corrosion, 

dents, deformation, or visible wear; and 

incorrectly assembled microswitch 

assemblies, actuators, and limit 

switches), and applicable on-condition 

actions. The on-condition actions 

include clearing the seat tracks of 

foreign object debris (FOD), overhauling 

the HMS, and replacing the horizontal 

actuator. The material also describes 

procedures for an optional terminating 

action for the repetitive checks by 

installing a serviceable Captain’s or First 

Officer’s seat. The service information 

adds Ipeco seat part number 3A090– 

0078–03–1, 3A090–0078–04–1, and 

3A090–0078–05–1. 

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 ADDRESSES section. 

Proposed AD Requirements in This 

NPRM 

Although this proposed AD does not 

explicitly restate the requirements of AD 

2019–14–13, this proposed AD would 

retain all of the requirements of AD 

2019–14–13. Those requirements are 

referenced in the service information 

identified previously, which, in turn, is 

referenced in paragraphs (g) and (h) of 

this proposed AD. 

This proposed AD would require 

accomplishing the actions specified in 

the service information 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 service 

information at regulations.gov under 

Docket No. FAA–2024–2136. 

Acceptable Methods of Compliance 

The FAA has determined that the 

actions required by paragraphs (g) and 

(h) of this AD are not required, under 

specific conditions, e.g., if it can be 

shown through maintenance records 

that the required actions have already 

been accomplished by the previous 

revision of the service information and 

specific conditions have been met. 

Paragraph (j) of this AD identifies these 

conditions. Complying with these 

conditions adequately addresses the 

unsafe condition identified in this 

proposed AD. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 694 

airplanes of U.S. registry. The FAA 

estimates the following costs to comply 

with this proposed AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS PER SEAT

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

operators 

Identification, seat (retained 

actions from AD 2019–14– 

13).

1 work-hour × $85 per hour = 

$85.

$0 $85 ......................................... $117,980. 

Detailed inspection, HMS (retained actions from AD 

2019–14–13).

1 work-hour × $85 per hour = 

$85.

$0 $85 ......................................... Up to $117,980. 

Checks, HMS (retained from 

AD 2019–14–13).

2 work-hours × $85 per hour 

= $170, per check cycle.

0 $170, per check cycle ............ Up to $235,960, per check 

cycle. 

Identification, seat (new proposed actions).1 work-hour × $85 per hour = 

$85.

0 $85 ......................................... Up to $117,980. 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that will be required. The FAA 

has no way of determining the number 

of aircraft that might need these oncondition actions: 


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ESTIMATED COSTS OF ON-CONDITION ACTIONS * 

Action Labor cost Parts cost Cost per product 

Adjustment, control lever cable ..... 1 work-hour × $85 per hour = $85 $0 .................................................. $85. 

Overhaul, HMS .............................. 11 work-hours × $85 per hour = 

$935.

Up to $5,824 ................................. Up to $6,759. 

Inspection of each seat’s fore/aft 

and vertical manual control levers.

1 work-hour × $85 per hour = $85 

per seat.

$0 .................................................. $85 per seat. 

Installation of serviceable seats ..... 1 work-hour × $85 per hour = $85 

per seat.

$0 .................................................. $85 per seat. 

Clearing FOD ................................. 1 work-hour × $85 per hour = $85 

per seat.

$0 .................................................. $85 per seat. 

Replacement of the horizontal actuator.1 work-hour × $85 per hour = $85 

per actuator.

$7,937 per actuator ...................... $8,022 per actuator. 

Operational test, adjusted control 

lever cable.

1 work-hour × $85 per hour = $85 

per seat.

$0 .................................................. $85 per seat. 

* The estimated cost for tooling to align an affected seat for adjustment of the control lever cable is up to $46,064. 

The FAA has received no definitive 

data that would enable the FAA to 

provide cost estimates for the optional 

terminating action for the repetitive 

checks specified in this proposed AD. 

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: 

■ a. Removing Airworthiness Directive 

2019–14–13, Amendment 39–19691 (84 

FR 38855, August 8, 2019), and 

■ b. Adding the following new 

Airworthiness Directive: 

The Boeing Company: Docket No. FAA– 

2024–2136; Project Identifier AD–2023– 

00296–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by October 24, 

2024. 

(b) Affected ADs 

This AD replaces AD 2019–14–13, 

Amendment 39–19691 (84 FR 38855, August 

8, 2019) (AD 2019–14–13). 

(c) Applicability 

(1) This AD applies to all The Boeing 

Company Model 767–200, –300, –300F, and 

–400ER series airplanes, certificated in any 

category. 

(2) Installation of Supplemental Type 

Certificate (STC) ST01920SE does not affect 

the ability to accomplish the actions required 

by this AD. Therefore, for airplanes on which 

STC ST01920SE is installed, a ‘‘change in 

product’’ alternative method of compliance 

(AMOC) approval request is not necessary to 

comply with the requirements of 14 CFR 

39.17. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 25, Equipment/furnishings. 

(e) Unsafe Condition 

This AD was prompted by reports of 

uncommanded fore and aft movement of the 

Captain’s and First Officer’s seats. The FAA 

is issuing this AD to address uncommanded 

fore and aft movement of the Captain’s and 

First Officer’s seats. The unsafe condition, if 

not addressed, could result in an 

uncommanded fore or aft seat movement 

during a critical part of a flight, such as 

takeoff or landing, and could cause a flight 

control obstruction or unintended flight 

control input, which could result in the loss 

of the ability to control the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Seat Part Number Identification and OnCondition Actions 

Except as specified in paragraphs (i) and (j) 

of this AD: At the applicable time specified 

in the ‘‘Compliance,’’ paragraph of Boeing 

Special Attention Service Bulletin 767–25– 

0539, Revision 2, dated January 27, 2023, do 

an inspection to determine the part number, 

and serial number as applicable, of the 

Captain’s and First Officer’s seats, and all 

applicable on-condition actions, in 

accordance with the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 767–25–0539, Revision 2, 

dated January 27, 2023. A review of airplane 

maintenance records is acceptable in lieu of 

this inspection if the part number and serial 

number of the Captain’s and First Officer’s 

seats can be conclusively determined from 

that review. 


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(h) Detailed Inspection, and Repetitive 

Checks of Horizontal Movement System and 

On-Condition Actions 

Except as specified by paragraphs (i) and 

(j) of this AD: At the applicable times 

specified in the ‘‘Compliance,’’ paragraph of 

Boeing Special Attention Bulletin 767–25– 

0549, Revision 2, dated January 27, 2023, do 

all applicable actions identified as ‘‘RC’’ 

(required for compliance) in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Special Attention 

Bulletin 767–25–0549, Revision 2, dated 

January 27, 2023. Actions identified as 

terminating action in Boeing Special 

Attention Bulletin 767–25–0549, Revision 2, 

dated January 27, 2023, terminate the 

applicable required actions of this AD, 

provided the terminating action is done in 

accordance with the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 767–25–0549, Revision 2, 

dated January 27, 2023. 

(i) Exceptions to Service Information 

Specifications 

(1) Where the ‘‘Compliance’’ paragraph of 

Boeing Special Attention Bulletin 767–25– 

0549, Revision 2, dated January 27, 2023, 

refers to the original issue date of the service 

bulletin, this AD requires using September 

12, 2019 (the effective date of AD 2019–14– 

13). 

(2) Where the ‘‘Compliance’’ paragraph of 

Boeing Special Attention Bulletin 767–25– 

0549, Revision 2, dated January 27, 2023, 

refers to the Revision 2 date of the service 

bulletin, this AD requires using the effective 

date of this AD. 

(3) Where the ‘‘Compliance’’ paragraph of 

Boeing Special Attention Service Bulletin 

767–25–0539, Revision 2, dated January 27, 

2023, refers to within 72 months after the 

original issue date of the service bulletin, this 

AD requires using within 36 months after 

September 12, 2019 (the effective date of AD 

2019–14–13). 

(4) Where the ‘‘Compliance’’ paragraph of 

Boeing Special Attention Bulletin 767–25– 

0539, Revision 2, dated January 27, 2023, 

refers to the Revision 2 date of the service 

bulletin, this AD requires using the effective 

date of this AD. 

(j) Acceptable Conditions for Compliance 

If the airplane records show that an Ipeco 

Captain’s or First Officer’s seat meets all 

criteria specified in any row in figure 1 to 

paragraph (j) of this AD, the actions specified 

in paragraphs (g) and (h) of this AD are not 

required for that seat. 

Figure 1 to Paragraph (j)—Alternative 

Acceptable Seats 


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Installation per Boeing And installation per Special Attention lpeco Service Bulletin - Having lpeco P/N - And additional required conditions -

Service Bulletin -

767-25-0539, Revision 1, None 3A258-0041-01-2 or No additional conditions required. dated July 17, 2018 3A258-0042-01-2 

The manual override cable maintenance 

098-25-03, Issue 1, has been completed on the seat in 

767-25-0539, Revision 1, dated October 2, 2013; 3A090-0025-01-1 or 

accordance with the lpeco Component 

dated July 17, 2018 or Issue 2, dated March 3A090-0026-01-1 Maintenance Manual 25-10-95, Revision 

28, 2014, or Issue 3, 16, dated September 6, 2013, or 

dated March 4, 2020 subsequent revisions up to and including 

Revision 25, dated July 12, 2023. 

3A090-0077-01-1, The manual override cable maintenance 

210-25-04, Issue 1, 3A090-0077-02-1, has been completed on the seat in 

767-25-0539, Revision 1, dated November 4, 3A090-0078-01-1, accordance with the lpeco Component 

dated July 17, 2018 2013; or Issue 2, dated 3A090-0078-02-1, Maintenance Manual 25-10-78, Revision 

March 28, 2014; or Issue 3A090-0078-03-1 , 20, dated September 12, 2013, or 

3, dated March 3, 2020 3A090-0078-04-1 , subsequent revisions up to and including 

or 3A090-0078-05-1 Revision 29, dated October 13, 2023. 

The manual override cable maintenance 

258-25-08, Issue 4, has been completed on the seat in 

767-25-0539, Revision 1, dated April 25, 2014; or 3A258-0007-01-1 or 

accordance with the lpeco Component 

dated July 17, 2018 Issue 5, dated March 4, 3A258-0008-01-1 Maintenance Manual 25-11-26, Revision 

2020; or Issue 6, dated 16, dated September 12, 2013, or 

January 28, 2021 subsequent revisions up to and including 

Revision 40, dated December 4, 2023. 

258-25-08, Issue 4, 

767-25-0539, Revision 1, dated April 25, 2014; or 3A258-0041-01-1 or 

Does not have a serial number identified 

dated July 17, 2018 Issue 5, dated March 4, 3A258-0042-01-1 by the effectivity of the referenced lpeco 

2020; or Issue 6, dated Service Bulletins. 

January 28, 2021 

The manual override cable maintenance 

258-25-08, Issue 4, has been completed on the seat in 

767-25-0539, Revision 1, dated April 25, 2014; or 3A258-0041-01-1 or 

accordance with the lpeco Component 

dated July 17, 2018 Issue 5, dated March 4, 3A258-0042-01-1 Maintenance Manual 25-11-38, Revision 

2020; or Issue 6, dated 21, dated December 12, 2013, or 

January 28, 2021 subsequent revisions up to and including 

Revision 38, dated December 2, 2023. 

The manual override cable maintenance 

has been completed on the seat in 

767-25-0539, Revision 1, 258-25-08, Issue 6, 3A258-0007-01-12 accordance with the lpeco Component 

or 3A258-0008-01- Maintenance Manual 25-11-26, Revision dated July 17, 2018 dated January 28, 2021 12 16, dated September 12, 2013, or 

subsequent revisions up to and including 

Revision 40, dated December 4, 2023. 

767-25-0539, Revision 1, 258-25-08, Issue 6, 3A258-0041-01-12 Does not have a serial number identified 

or 3A258-0042-01- by the effectivity of the referenced lpeco dated July 17, 2018 dated January 28, 2021 12 Service Bulletin. 
73008 Federal Register / Vol. 89, No. 174 / Monday, September 9, 2024 / Proposed Rules 

(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) 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. 

(4) AMOCs approved for AD 2019–14–13 

are approved as AMOCs for the 

corresponding provisions of Boeing Special 

Attention Service Bulletin 767–25–0539, 

Revision 2, dated January 27, 2023, and 

Boeing Special Attention Service Bulletin 

767–25–0549, Revision 2, dated January 27, 

2023, that are required by paragraphs (g) and 

(h) of this AD. 

(5) For service information that contains 

steps that are labeled as Required for 

Compliance (RC), the provisions of 

paragraphs (k)(5)(i) and (ii) of this AD apply. 

(i) The steps labeled as RC, including 

substeps under an RC step and any figures 

identified in an RC step, must be done to 

comply with the AD. If a step or substep is 

labeled ‘‘RC Exempt,’’ then the RC 

requirement is removed from that step or 

substep. An AMOC is required for any 

deviations to RC steps, including substeps 

and identified figures. 

(ii) Steps not labeled as RC may be 

deviated from using accepted methods in 

accordance with the operator’s maintenance 

or inspection program without obtaining 

approval of an AMOC, provided the RC steps, 

including substeps and identified figures, can 

still be done as specified, and the airplane 

can be put back in an airworthy condition. 

(l) Related Information 

For more information about this AD, 

contact Courtney Tuck, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, Des 


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Installation per Boeing And installation per Special Attention Having lpeco P/N - And additional required conditions -

Service Bulletin - lpeco Service Bulletin -

The manual override cable maintenance 

has been completed on the seat in 

767-25-0539, Revision 1, 258-25-08, Issue 6, 3A258-0041-01-12 accordance with the lpeco Component 

dated July 17, 2018 dated January 28, 2021 or 3A258-0042-01- Maintenance Manual 25-11-38, Revision 

12 21, dated December 12, 2013, or 

subsequent revisions up to and including 

Revision 38, dated December 2, 2023. 

3A258-0007-01-2, 

3A258-0007-01-12, 

3A258-0008-01-2, 

767-25-0549, Revision 1, 3A258-0008-01-12, 

dated August 1 o, 2018 None 3A258-0041-01-2, No additional conditions required. 

3A258-0041-01-12, 

3A258-0042-01-2, 

or 3A258-0042-01-

12 

258-25-13, Issue 3, 

767-25-0549, Revision 1, dated November 27, 3A258-0041-01-1 or 

Has a horizontal actuator with Artus part 

dated August 1 o, 2018 2017; or Issue 4, dated 3A258-0042-01-1 number AD8650503 at "Amendment C" 

April 28, 2020; or Issue 5, or later. 

dated November 1, 2021 

258-25-14, Issue 4, 

767-25-0549, Revision 1, dated January 9, 2018; or 3A258-0041-01-1 or 

Has a horizontal actuator with Artus part 

dated August 1 o, 2018 Issue 5, dated April 28, 3A258-0042-01-1 number AD8650503 at "Amendment C" 

2020 or later. 

258-25-15, Issue 4, 

767-25-0549, Revision 1, dated February 16, 2018; 3A258-0007-01-1 or 

Has a horizontal actuator with Artus part 

dated August 1 o, 2018 or Issue 5, dated April 3A258-0008-01-1 number AD8650503 at "Amendment C" 

29, 2020; or Issue 6, or later. 

dated November 1, 2021 

258-25-16, Issue 4, 

767-25-0549, Revision 1, dated September 11, 3A258-0007-01-1 or 

Has a horizontal actuator with Artus part 

dated August 1 o, 2018 2017; or Issue 5, dated 3A258-0008-01-1 number AD8650503 at "Amendment C" 

April 29, 2020 or later. 
Federal Register / Vol. 89, No. 174 / Monday, September 9, 2024 / Proposed Rules 73009 

Moines, WA 98198; phone 206–231–3986; 

email Courtney.K.Tuck@faa.gov. 

(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 the AD specifies otherwise. 

(i) Boeing Special Attention Service 

Bulletin 767–25–0539, Revision 2, dated 

January 27, 2023. 

(ii) Boeing Special Attention Service 

Bulletin 767–25–0549, Revision 2, dated 

January 27, 2023. 

(3) For Boeing material identified in this 

AD, contact Boeing Commercial Airplanes, 

Attention: Contractual & Data Services 

(C&DS), 2600 Westminster Boulevard, MC 

110–SK57, Seal Beach, CA 90740–5600; 

phone 562–797–1717; website 

myboeingfleet.com. 

(4) You may view this material 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. 

(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 August 26, 2024. 

Suzanne Masterson, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–20160 Filed 9–6–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1896; Project 

Identifier MCAI–2023–00978–T] 

RIN 2120–AA64 

Airworthiness Directives; MHI RJ 

Aviation ULC (Type Certificate 

Previously Held by Bombardier Inc.) 

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 MHI RJ Aviation ULC Model 

CL–600–2B19 (Regional Jet Series 100 

and 440), CL–600–2C10 (Regional Jet 

Series 700, 701, and 702), CL–600–2C11 

(Regional Jet Series 550), CL–600–2D15 

(Regional Jet Series 705), CL–600–2D24 

(Regional Jet Series 900), and CL–600– 

2E25 (Regional Jet Series 1000) 

airplanes. AD 2023–10–02 was 

prompted by the determination that 

radio altimeters cannot be relied on to 

perform their intended function if they 

experience interference from wireless 

broadband operations in the 3.7–3.98 

GHz frequency band (5G C-Band). This 

AD was prompted by the determination 

that this interference can also result in 

certain failure messages being inhibited 

longer than intended. This proposed AD 

would require installing a new radio 

frequency (RF) bandpass filter on the 

coaxial line between the radio altimeter 

and the receive antenna in the aft 

equipment compartment. 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 October 24, 

2024. 

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–2024–1896; 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 MHI RJ material identified in 

this proposed AD, contact MHI RJ 

Aviation Group, Customer Response 

Center, 3655 Ave. des GrandesTourelles, Suite 110, Boisbriand, 

Que ́bec J7H 0E2 Canada; North America 

toll-free telephone 833–990–7272 or 

direct-dial telephone 450–990–7272; fax 

514–855–8501; email thd.crj@

mhirj.com; website mhirj.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. 

FOR FURTHER INFORMATION CONTACT: 

Steven Dzierzynski, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7300; email 9-avsnyaco-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–2024–1896; Project Identifier 

MCAI–2023–00978–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 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. Any 

commentary that the FAA receives that 

is not specifically designated as CBI will 

be placed in the public docket for this 

rulemaking. 


ddrumheller on DSK120RN23PROD with PROPOSALS1