Proposed Rule2023-20507
Airworthiness Directives; The Boeing Company Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
September 25, 2023
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
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.
Full Text
<html>
<head>
<title>Federal Register, Volume 88 Issue 184 (Monday, September 25, 2023)</title>
</head>
<body><pre>
[Federal Register Volume 88, Number 184 (Monday, September 25, 2023)]
[Proposed Rules]
[Pages 65637-65640]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-20507]
-----------------------------------------------------------------------
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:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> 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.
<bullet> 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 <a href="http://regulations.gov">regulations.gov</a> 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:
<bullet> 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 <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
<bullet> 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
<a href="http://regulations.gov">regulations.gov</a> 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: <a href="/cdn-cgi/l/email-protection#3c734b5952127a127e50594511715d50597c5a5d5d125b534a"><span class="__cf_email__" data-cfemail="d699a1b3b8f890f894bab3affb9bb7bab396b0b7b7f8b1b9a0">[email protected]</span></a>.
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
[[Page 65638]]
information as described in 14 CFR 11.35, the FAA will post all
comments received, without change, to <a href="http://regulations.gov">regulations.gov</a>, 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: <a href="/cdn-cgi/l/email-protection#48073f2d26660e660a242d31650529242d082e2929662f273e"><span class="__cf_email__" data-cfemail="a0efd7c5ce8ee68ee2ccc5d98dedc1ccc5e0c6c1c18ec7cfd6">[email protected]</span></a>.
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 <a href="http://regulations.gov">regulations.gov</a> 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 1 work-hour x $85 per $0....................... $85............................ $62,730.
actions from AD 2009-01-02). hour = $85.
Eddy current inspections (retained Up to 216 work-hours x 0........................ Up to 18,360................... Up to 13,549,680.
actions from AD 2009-01-02). 85 per hour = Up to
18,360.
Replace support fittings (retained Up to 346 work-hours x Up to 28,789............. Up to 57,889................... Up to 42,722,082.
actions from AD 2009-01-02). 85 per hour = Up to
29,410.
[[Page 65639]]
Post-repair Inspections (new 42 work-hours x 85 per 0........................ 3,570 per inspection cycle..... 2,634,660 per inspection cycle.
proposed action). hour = 3,570 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
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by:
0
a. Removing Airworthiness Directive (AD) 2009-01-02, Amendment 39-15780
(74 FR 4117, January 23, 2009), and
0
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-
, 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
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
[[Page 65640]]
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 (<a href="http://drs.faa.gov/browse/excelExternalWindow/0812969A86AF879B8625766400600105.0001">drs.faa.gov/browse/excelExternalWindow/0812969A86AF879B8625766400600105.0001</a>)
(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: <a href="/cdn-cgi/l/email-protection#a79e8ae6e9ea8af4c2c6d3d3cbc28ae6e4e88ae6eae8e48af5c2d6d2c2d4d3d4e7c1c6c689c0c8d1"><span class="__cf_email__" data-cfemail="5d64701c1310700e383c29293138701c1e12701c10121e700f382c28382e292e1d3b3c3c733a322b">[email protected]</span></a>.
(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: <a href="/cdn-cgi/l/email-protection#baf5cddfd494fc94f8d6dfc397f7dbd6dffadcdbdb94ddd5cc"><span class="__cf_email__" data-cfemail="ffb0889a91d1b9d1bd939a86d2b29e939abf999e9ed1989089">[email protected]</span></a>.
(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 <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
(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 <a href="/cdn-cgi/l/email-protection#7117035f181f0201141205181e1f311f1003105f161e07"><span class="__cf_email__" data-cfemail="3a5c48145354494a5f594e5355547a545b485b145d554c">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
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
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on September 25, 2023.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.