Federal Register / Vol. 88, No. 184 / Monday, September 25, 2023 / Proposed Rules 65637 

of Canada Limited Service Bulletin 84–53– 

81, dated May 27, 2022. 

(i) 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, International Validation 

Branch, mail it to the address identified in 

paragraph (j)(2) of this AD or email to: 9- 

AVS-AIR-730-AMOC@faa.gov. 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 De 

Havilland Aircraft of Canada Limited’s 

Transport Canada Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(j) Additional Information 

(1) Refer to Transport Canada AD CF– 

2022–63, dated November 17, 2022, for 

related information. This Transport Canada 

AD may be found in the AD docket at 

regulations.gov under Docket No. FAA– 

2023–1885. 

(2) For more information about this AD, 

contact Deep Gaurav, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email: deep.gaurav@faa.gov. 

(k) 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) De Havilland Aircraft of Canada Limited 

Service Bulletin 84–53–81, Revision A, dated 

August 23, 2022. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact De Havilland Aircraft of 

Canada Limited, Dash 8 Series Customer 

Response Centre, 5800 Explorer Drive, 

Mississauga, Ontario, L4W 5K9, Canada; 

telephone 855–310–1013 or 647–277–5820; 

email: thd@dehavilland.com; website: 

dehavilland.com. 

(4) 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. 

(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 18, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–20514 Filed 9–22–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1886; Project 

Identifier AD–2023–00429–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) 

2009–01–02, which applies to certain 

Boeing Model 737–600, –700, –700C, 

–800, and –900 series airplanes. AD 

2009–01–02 requires an inspection of 

frames between body station (BS) 360 

and BS 907 to determine if certain 

support brackets of the air conditioning 

(A/C) outlet extrusions are installed, 

inspections for cracking of the frames 

around the attachment holes of the 

subject brackets, and repair if necessary. 

AD 2009–01–02 also requires installing 

new, improved fittings for all support 

brackets of the A/C outlet extrusions 

between BS 360 and BS 907. Since the 

FAA issued AD 2009–01–02, the agency 

determined that certain repairs might 

develop fatigue cracks that could result 

in the inability of the frame to sustain 

limit load and therefore must be 

inspected. This proposed AD would 

continue to require the actions specified 

in AD 2009–01–02 and would also 

require repetitive inspections for 

cracking of certain repairs and repair if 

necessary. 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 November 9, 

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–2023–1886; 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 service information identified 

in this NPRM, 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 service 

information 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 by searching for and 

locating Docket No. FAA–2023–1886. 

FOR FURTHER INFORMATION CONTACT: 

Owen F. Bley-Male, Aviation Safety 

Engineer, FAA, 2200 South 216th St., 

Des Moines, WA 98198; phone: 206– 

231–3992; email: Owen.F.Bley-Male@

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–2023–1886; Project Identifier AD– 

2023–00429–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 


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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 proposed AD. 

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 Owen F. Bley-Male, 

Aviation Safety Engineer, FAA, 2200 

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

phone: 206–231–3992; email: 

Owen.F.Bley-Male@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 2009–01–02, 

Amendment 39–15780 (74 FR 4117, 

January 23, 2009) (AD 2009–01–02), for 

certain Boeing Model 737–600, –700, 

–700C, –800, and –900 series airplanes. 

AD 2009–01–02 was prompted by 

numerous reports of multiple cracks in 

the frame around the attachment holes 

of the support bracket of the A/C outlet 

extrusion. AD 2009–01–02 requires a 

one-time general visual inspection of 

frames between BS 360 and BS 907 to 

determine if certain support brackets of 

the A/C outlet extrusions are installed, 

medium- and high-frequency eddy 

current inspections for cracking of the 

frames around the attachment holes of 

the subject brackets, and repair if 

necessary. AD 2009–01–02 also requires 

installing new, improved fittings for all 

support brackets of the A/C outlet 

extrusions between BS 360 and BS 907. 

AD 2009–01–02 refers to Boeing Special 

Attention Service Bulletin 737–25– 

1544, Revision 1, dated January 16, 

2008, as the appropriate source of 

service information for accomplishing 

the required actions. The agency issued 

AD 2009–01–02 to prevent frame 

cracking, which, if not corrected, could 

lead to a severed frame that, combined 

with cracking of the skin lap splice 

above stringer 10, could result in rapid 

decompression of the airplane. 

Actions Since AD 2009–01–02 Was 

Issued 

Since the FAA issued AD 2009–01– 

02, Boeing issued Special Attention 

Service Bulletin 737–25A1544, Revision 

3, dated May 16, 2016, as an alternative 

method of compliance for AD 2009–01– 

02, which includes an alternative to 

making repairs using Boeing Special 

Attention Service Bulletin 737–25– 

1544, Revision 1, dated January 16, 

2008. The FAA and Boeing determined 

that the repairs done using Boeing 

Special Attention Service Bulletin 737– 

25A1544, Revision 3, dated May 16, 

2016, might develop fatigue cracks that 

could result in the inability of the frame 

to sustain limit load. Boeing 

subsequently issued Alert Service 

Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022, which added 

damage tolerance inspections for certain 

BS 907 repairs done using Boeing 

Special Attention Service Bulletin 737– 

25A1544, Revision 3, dated May 16, 

2016. The FAA determined that those 

post-repair inspections are necessary to 

address 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. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Boeing Alert 

Service Bulletin 737–25A1544, Revision 

4, dated February 15, 2022. This service 

information specifies procedures for a 

one-time general visual inspection of 

frames between BS 360 and BS 907 to 

determine if certain support brackets of 

the A/C outlet extrusions are installed; 

low-, medium- and high-frequency eddy 

current inspections for cracking of the 

frames around the attachment holes of 

the subject brackets, and repair if 

necessary; and installation of new, 

improved fittings for all support 

brackets of the A/C outlet extrusions 

between BS 360 and BS 907. This 

service information also specifies 

procedures for repetitive detailed and 

high-frequency eddy current inspections 

for cracking of certain repairs at BS 907 

and repair if necessary. 

This AD also requires Boeing Special 

Attention Service Bulletin 737–25– 

1544, Revision 1, dated January 16, 

2008, which the Director of the Federal 

Register approved for incorporation by 

reference as of February 27, 2009 (74 FR 

4117, January 23, 2009). 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in the ADDRESSES section. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

accomplishing the actions specified in 

the service information described 

previously, 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 by 

searching for and locating Docket No. 

FAA–2023–1886. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 738 

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 

General visual inspection (retained actions from AD 2009–01–02).1 work-hour × $85 per hour = $85 ........ $0 ................... $85 ......................... $62,730. 

Eddy current inspections (retained actions from AD 2009–01–02).Up to 216 work-hours × 85 per hour = 

Up to 18,360.

0 ..................... Up to 18,360 .......... Up to 13,549,680. 

Replace support fittings (retained actions from AD 2009–01–02).Up to 346 work-hours × 85 per hour = 

Up to 29,410.

Up to 28,789 .. Up to 57,889 .......... Up to 42,722,082. 


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ESTIMATED COSTS—Continued 

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

operators 

Post-repair Inspections (new proposed 

action).

42 work-hours × 85 per hour = 3,570 

per inspection cycle.

0 ..................... 3,570 per inspection cycle.2,634,660 per inspection cycle. 

The FAA has received no definitive 

data on which to base the cost estimates 

for the on-condition repairs that would 

be required based on the results of the 

inspections 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 has determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would not 

have a substantial direct effect on the 

States, on the relationship between the 

national Government and the States, or 

on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that the 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) 2009–01–02, Amendment 39– 

15780 (74 FR 4117, January 23, 2009), 

and 

■ b. Adding the following new AD: 

The Boeing Company: Docket No. FAA– 

2023–1886; Project Identifier AD–2023– 

00429–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) action by 

November 9, 2023. 

(b) Affected ADs 

This AD replaces AD 2009–01–02, 

Amendment 39–15780 (74 FR 4117, January 

23, 2009) (AD 2009–01–02). 

(c) Applicability 

This AD applies to Boeing Model 737–600, 

–700, –700C, –800, and –900 series airplanes, 

certificated in any category, as identified in 

Boeing Special Attention Service Bulletin 

737–25A1544, Revision 4, dated February 15, 

2022. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 25, Equipment/Furnishing. 

(e) Unsafe Condition 

This AD was prompted by numerous 

reports of multiple cracks in the frame 

around the attachment holes of the support 

bracket of the air conditioning (A/C) outlet 

extrusion. Also, the FAA determined that 

certain repairs done to comply with AD 

2009–01–02 might develop fatigue cracks 

that could result in the inability of the frame 

to sustain limit load and must be inspected. 

The FAA is issuing this AD to address frame 

cracking, which, if not corrected, could lead 

to a severed frame that, combined with 

cracking of the skin lap splice above stringer 

10, could result in rapid decompression of 

the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Inspection, With New Service 

Information 

This paragraph restates the requirements of 

paragraph (f) of AD 2009–01–02, with new 

service information. Before the accumulation 

of 36,000 total flight cycles, or within 72 

months after February 27, 2009 (the effective 

date of AD 2009–01–02), whichever occurs 

later, except as required by paragraph (i) of 

this AD: Do a general visual inspection to 

determine if the support brackets of the A/ 

C outlet extrusions between body station (BS) 

360 and BS 907 have two-rivet attachment 

fittings in accordance with Part 2 of the 

Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 737–25– 

1544, Revision 1, dated January 16, 2008, or 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022; except 

at the locations identified in the notes of Step 

3.B.1 of Part 1 of the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 737–25–1544, Revision 1, 

dated January 16, 2008, or Boeing Alert 

Service Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022. As of the effective 

date of this AD, only use Boeing Alert 

Service Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022, for the actions 

required by paragraph (g) of this AD. 

(1) For any support bracket attached with 

three or more rivets: No further action is 

required by paragraph (g) of this AD. 

(2) For any subject support bracket having 

a two-rivet attachment fitting: Before the 

accumulation of 36,000 total flight cycles, or 

within 72 months after February 27, 2009 

(the effective date of AD 2009–01–02), 

whichever occurs later, except as required by 

paragraph (i) of this AD, do medium- and 

high-frequency eddy current inspections for 

cracking of the frame around the attachment 

holes of the support bracket, in accordance 

with Part 2 of the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 737–25–1544, Revision 1, 

dated January 16, 2008, or do low-, mediumand high-frequency eddy current inspections 

for cracking of the frame around the 

attachment holes of the support bracket, in 

accordance with Part 2 of the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022. If any cracking is 

discovered, before further flight, repair the 

cracking in accordance with Part 3 of the 

Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 737–25– 

1544, Revision 1, dated January 16, 2008, or 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022, except 


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as required by paragraph (k)(2) of this AD. As 

of the effective date of this AD, only use 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022, for the 

actions required by paragraph (g)(2) of this 

AD. 

(h) Retained Modification With New Service 

Information 

This paragraph restates the requirements of 

paragraph (g) of AD 2009–01–02, with new 

service information. Except as required by 

paragraph (i) of this AD: Before the 

accumulation of 36,000 total flight cycles, or 

within 72 months after February 27, 2009 

(the effective date of AD 2009–01–02), 

whichever occurs later, replace the support 

fittings of all A/C outlet extrusions between 

BS 360 and BS 907 with new, improved 

support fittings, in accordance with Part 4 of 

the Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 737–25– 

1544, Revision 1, dated January 16, 2008, or 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022. As of 

the effective date of this AD, only use Boeing 

Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022, for the 

actions required by paragraph (h) of this AD. 

(i) Retained Compliance Time for Certain 

Airplanes With No Changes 

This paragraph restates the compliance 

time specified in paragraph (h) of AD 2009– 

01–02, with no changes. For airplanes on 

which Boeing Business Jet (BBJ) lower cabin 

altitude modification is incorporated in 

accordance with Supplemental Type 

Certificate ST01697SE: Before the 

accumulation of 18,000 total flight cycles, or 

within 72 months after February 27, 2009 

(the effective date of AD 2009–01–02), 

whichever occurs later, do the actions 

specified in paragraphs (g) and (h) of this AD. 

(j) New Requirements of This AD 

For Groups 1 through 4 and Group 6 as 

identified in Boeing Alert Service Bulletin 

737–25A1544, Revision 4, dated February 15, 

2022: Except as specified in paragraph (k) of 

this AD: At the applicable time specified in 

Table 2 of the ‘‘Compliance’’ paragraph of 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022, do a 

detailed inspection and a high-frequency 

eddy current inspection for cracking of the 

repaired area at frame BS 907, and do all 

applicable repairs before further flight, in 

accordance with the Accomplishment 

Instructions of in Boeing Alert Service 

Bulletin 737–25A1544, Revision 4, dated 

February 15, 2022. Repeat the inspections 

thereafter at the applicable time specified in 

Table 2 of the ‘‘Compliance’’ paragraph of 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022. 

(k) Exceptions to Service Information 

Specifications 

(1) Where the Compliance Time column of 

Table 2 in the ‘‘Compliance’’ paragraph of 

Boeing Alert Service Bulletin 737–25A1544, 

Revision 4, dated February 15, 2022, uses the 

phrase ‘‘the Revision 4 date of this Service 

Bulletin,’’ this AD requires using ‘‘the 

effective date of this AD.’’ 

(2) Where Boeing Alert Service Bulletin 

737–25A1544, Revision 4, dated February 15, 

2022, specifies contacting Boeing, this AD 

requires repair before further flight using a 

method approved in accordance with the 

procedures specified in paragraph (m) of this 

AD. 

(3) For airplanes on which Boeing Business 

Jet Lower Cabin Altitude Supplemental Type 

Certificate (STC) ST01697SE (drs.faa.gov/ 

browse/excelExternalWindow/ 

0812969A86AF879B8

625766400600105.0001) (6,500 feet 

maximum cabin altitude in lieu of 8,000 feet) 

has been incorporated, the flight-cycle 

related compliance times for the inspections 

required by paragraph (j) of this AD are 

different from those specified in Table 2 of 

the ‘‘Compliance’’ paragraph in Boeing Alert 

Service Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022. All initial 

compliance times specified in total flight 

cycles or flight cycles must be reduced to half 

of those specified in Table 2 of the 

‘‘Compliance’’ paragraph in Boeing Alert 

Service Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022. All repetitive 

interval compliance times specified in flight 

cycles must be reduced to one-quarter of 

those specified in Table 2 of the 

‘‘Compliance’’ paragraph in Boeing Alert 

Service Bulletin 737–25A1544, Revision 4, 

dated February 15, 2022. 

(l) Credit for Previous Actions 

(1) This paragraph provides credit for the 

actions specified in paragraphs (g) and (h) of 

this AD, if those actions were performed 

before February 27, 2009 (the effective date 

of AD 2009–01–02) using Boeing Alert 

Service Bulletin 737–25–1544, dated October 

4, 2006. 

(2) This paragraph provides credit for the 

actions specified in paragraphs (g) and (h) of 

this AD, if those actions were performed 

before the effective date of this AD using 

Boeing Special Attention Service Bulletin 

737–25–1544, Revision 2, dated March 23, 

2011, or Boeing Special Attention Service 

Bulletin 737–25–1544, Revision 3, dated May 

16, 2016. 

(m) 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 AIR–520, Continued 

Operational Safety Branch, send it to the 

attention of the person identified in 

paragraph (n)(1) of this AD. Information may 

be emailed to: 9-ANM-Seattle-ACO-AMOCRequests@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 2009–01–02 

are approved as AMOCs for the 

corresponding provisions of paragraphs (g) 

through (i) of this AD. 

(n) Related Information 

(1) For more information about this AD, 

contact Owen F. Bley-Male, Aviation Safety 

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

Moines, WA 98198; phone: 206–231–3992; 

email: Owen.F.Bley-Male@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (o)(5) and (6) of this AD. 

(o) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

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

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(3) The following service information was 

approved for IBR on [DATE 35 DAYS AFTER 

PUBLICATION OF THE FINAL RULE]. 

(i) Boeing Alert Service Bulletin 737– 

25A1544, Revision 4, dated February 15, 

2022. 

(ii) [Reserved] 

(4) The following service information was 

approved for IBR on February 27, 2009 (74 

FR 4117, January 23, 2009). 

(i) Boeing Special Attention Service 

Bulletin 737–25–1544, Revision 1, dated 

January 16, 2008. 

(ii) [Reserved] 

(5) For service information 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 service information 

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 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 18, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–20507 Filed 9–22–23; 8:45 am] 

BILLING CODE 4910–13–P 


ddrumheller on DSK120RN23PROD with PROPOSALS1