[Federal Register Volume 88, Number 101 (Thursday, May 25, 2023)]
[Proposed Rules]
[Pages 33851-33855]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-11064]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-1037; Project Identifier AD-2023-00511-T]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2020-26-08 which applies to The Boeing Company Model 787-8, 787-9, and 
787-10 airplanes powered by Rolls-Royce Trent 1000 engines. AD 2020-26-
08 requires repetitive inspections of the inner fixed structure (IFS) 
forward upper fire seal and thermal insulation blankets in the forward 
upper area of the thrust reverser (TR) for damage and applicable on-
condition actions. Since the FAA issued AD 2020-26-08, it was 
determined a new upper splitter fairing assembly is needed to prevent 
the damage to the fire seal and thermal insulation blanket. This 
proposed AD would continue to require the actions specified in AD 2020-
26-08 and would require determining if an affected part number of the 
upper splitter fairing assembly is installed on the engine, replacing 
an affected upper splitter fairing assembly part number with a new 
upper splitter fairing assembly part number, inspecting the IFS forward 
upper fire seal and thermal insulation blanket for any damage, and 
applicable on-condition actions. This proposed AD would also prohibit 
the installation of

[[Page 33852]]

affected parts. 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 July 10, 
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-2023-1037; 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 Boulevard, 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 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-2023-1037.

FOR FURTHER INFORMATION CONTACT: Tak Kobayashi, Aerospace Engineer, 
Propulsion Section, West Certification Branch, FAA, 3960 Paramount 
Boulevard, Lakewood, CA 90712-4137; telephone: 206-231-3553; email: 
[email protected].

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-2023-1037; Project Identifier 
AD-2023-00511-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 Tak 
Kobayashi, Aerospace Engineer, Propulsion Section, West Certification 
Branch, FAA, 3960 Paramount Boulevard, Lakewood, CA 90712-4137; 
telephone: 206-231-3553; email: [email protected]. 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 2020-26-08, Amendment 39-21363 (85 FR 83755, 
December 23, 2020) (AD 2020-26-08), for The Boeing Company Model 787-8, 
787-9, and 787-10 airplanes powered by Rolls-Royce Trent 1000 engines. 
AD 2020-26-08 was prompted by reports of damage to the IFS forward 
upper fire seal and damage to the thermal insulation blankets in the 
forward upper area of the thrust reverser. AD 2020-26-08 requires 
repetitive inspections of the IFS forward upper fire seal and thermal 
insulation blankets in the forward upper area of the TR for damage and 
applicable on-condition actions. The FAA issued AD 2020-26-08 to 
address the damage to the IFS forward upper fire seal and the thermal 
insulation blankets of the TR due to airflow through structural gapping 
that could occur at the interface between the leading edge of the IFS 
and the engine splitter structure during flight. Failure of the IFS 
forward upper fire seal could cause the loss of seal pressurization and 
degrade the ability to detect and extinguish an engine fire, resulting 
in an uncontrolled fire. Damage to the TR insulation blanket could 
result in thermal damage to the TR inner wall, the subsequent release 
of engine exhaust components, and consequent damage to critical areas 
of the airplane. Furthermore, damage to the TR inner wall and IFS 
forward upper fire seal could compromise the integrity of the firewall 
and its ability to contain an engine fire, resulting in an uncontrolled 
fire, which could lead to loss of airplane control.

Actions Since AD 2020-26-08 Was Issued

    The preamble to AD 2020-26-08 specifies that the FAA considers that 
AD ``interim action'' and that the FAA might consider further 
rulemaking if a modification is developed, approved, and available. The 
manufacturer has since developed such a modification (installation of 
upper splitter fairing assembly part number KH99185), which would 
terminate the repetitive inspections required by AD 2020-26-08. The FAA 
has determined that this modification should be required.
    AD 2020-26-08 specifies doing actions in accordance with Boeing 
Alert Requirements Bulletin B787-81205-SB780041-00 RB, Issue 001, dated 
March 31, 2020. Boeing has since issued Boeing Alert Requirements 
Bulletin B787-81205-SB780041-00, Issue 002, dated December 21, 2021. 
Issue 002 adds two variable numbers to the effectivity that were 
missing in Issue 001; however, Issue 002 does not change the procedures 
in the Accomplishment Instructions or the compliance times. The FAA has 
added Boeing Alert Requirements Bulletin B787-81205-SB780041-00, Issue 
002, dated December 21, 2021, as an optional method of compliance to 
paragraph (g) of this proposed AD.

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.

[[Page 33853]]

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Boeing Alert Requirements Bulletin B787-81205-
SB720007-00 RB, Issue 001, dated December 12, 2022. This service 
information specifies procedures for replacing the upper splitter 
fairing assembly with a new upper splitter fairing assembly with ramp 
fairing incorporated, doing a general visual inspection of the IFS 
forward upper fire seal and thermal insulation blanket of the left and 
right TR halves for any damage, and applicable on-condition actions. 
On-condition actions include replacing the IFS forward upper fire seal 
and thermal insulation blanket of each TR half if damage is found. 
Those procedures in the service information apply to each affected 
engine.
    The FAA also reviewed Boeing Alert Requirements Bulletin B787-
81205-SB780041-00, Issue 002, dated December 21, 2021. The service 
information describes procedures for repetitive inspections of the IFS 
forward upper fire seal and thermal insulation blanket of the left and 
right TR halves for any damage, and applicable on-condition actions. 
On-condition actions include replacing the IFS forward upper fire seal 
and thermal insulation blanket of each TR half if damage is found. 
Those procedures in the service information apply to each affected 
engine.
    This proposed AD would also require Boeing Alert Requirements 
Bulletin B787-81205-SB780041-00 RB, Issue 001, dated March 31, 2020, 
which the Director of the Federal Register approved for incorporation 
by reference as of January 27, 2021 (85 FR 83755, December 23, 2020).
    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 ADDRESSES section.

Proposed AD Requirements in This NPRM

    This proposed AD would retain all requirements of AD 2020-26-08. 
Accomplishing the new actions proposed in this AD would terminate the 
requirements of AD 2020-26-08.
    This proposed AD would require accomplishing the actions specified 
in the service information already described, except as discussed under 
``Differences Between this Proposed AD and the Service Information'' 
and except for any differences identified as exceptions in the 
regulatory text of this proposed AD. This proposed AD would also 
prohibit the installation of affected parts. For information on the 
procedures and compliance times, see this service information at 
regulations.gov under Docket No. FAA-2023-1037.

Differences Between This Proposed AD and the Service Information

    The effectivity of Boeing Alert Requirements Bulletin B787-81205-
SB720007-00 RB, Issue 001, dated December 12, 2022, is limited to Model 
787-8, -9 and -10 airplanes having certain line numbers. However, the 
applicability of this proposed AD includes all Boeing Model 787-7, -8, 
and -9 airplanes with Rolls-Royce Trent 1000 engines installed. Because 
the affected upper splitter fairing assembly are rotable parts, the FAA 
has determined that these parts could later be installed on airplanes 
that were initially delivered with acceptable upper splitter fairing 
assembly, thereby subjecting those airplanes to the unsafe condition. 
The FAA has determined that the Accomplishment Instructions in Boeing 
Alert Requirements Bulletin B787-81205-SB720007-00 RB, Issue 001, dated 
December 12, 2022, can be applied to airplanes outside the effectivity 
of the service information if an affected part is installed on those 
airplanes. This proposed AD includes an inspection or records review to 
determine if an affected part is installed.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 13 airplanes of U.S. registry. The FAA estimates the following 
costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
            Action                Labor cost     Parts cost  Cost per product        Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Inspection (retained actions   2 work-hours x            $0  $170 per          $2,210 per inspection cycle.
 from AD 2020-26-08).           $85 per hour =                inspection
                                $170 per                      cycle.
                                inspection
                                cycle.
Inspection or records review   1 work-hour x              0  $85.............  $1,105.
 (new proposed action).         $85 per hour =
                                $85.
Replacement of each upper      71 work-hours x      230,000  $236,035........  $3,068,455.
 splitter fairing assembly      $85 per hour =
 (new proposed action).         $6,035.
Inspection (new proposed       2 work-hours x             0  $170............  $2,210.
 action).                       $85 per hour =
                                $170.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary 
replacements that would be required based on the results of the 
proposed inspection. The agency has no way of determining the number of 
aircraft that might need these replacements:

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                Action                        Labor cost               Parts cost            Cost per product
----------------------------------------------------------------------------------------------------------------
Fire seal replacement................  2 work-hours x $85 per   $1,383 per TR half.....  $1,553 per TR half (4
                                        hour = $170 per TR                                TR halves per
                                        half.                                             airplane).
Thermal insulation blanket             1 work-hour x $85 per    $18,214 per TR half....  $18,299 per TR half.
 replacement.                           hour = $85 per TR half.
----------------------------------------------------------------------------------------------------------------

    According to the manufacturer, some of the costs of this AD may be 
covered under warranty by Goodrich, thereby reducing the cost impact on 
affected operators. The FAA does not control warranty coverage for 
affected operators.

[[Page 33854]]

As a result, the FAA has included all known costs in the cost estimate.

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

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 2020-26-08, Amendment 39-21363 (85 
FR 83755, December 23, 2020), and
0
b. Adding the following new Airworthiness Directive:

The Boeing Company: Docket No. FAA-2023-1037; Project Identifier AD-
2023-00511-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by July 10, 2023.

(b) Affected ADs

    This AD replaces AD 2020-26-08, Amendment 39-21363 (85 FR 83755, 
December 23, 2020) (AD 2020-26-08).

(c) Applicability

    This AD applies to The Boeing Company Model 787-8, 787-9, and 
787-10 airplanes, certificated in any category, with Rolls-Royce 
Trent 1000 engines installed.

(d) Subject

    Air Transport Association (ATA) of America Code: 72, Turbine/
turboprop engine.

(e) Unsafe Condition

    This AD was prompted by reports of Rolls-Royce Trent 1000 
powered airplanes having damage to the thrust reverser inner fixed 
structure (IFS) forward upper fire seal and damage to thermal 
insulation blankets in the forward upper area of the thrust reverser 
(TR). The FAA is issuing this AD to address the damage to the IFS 
forward upper fire seal and the thermal insulation blankets of the 
TR due to airflow through structural gapping that could occur at the 
interface between the leading edge of the IFS and the engine 
splitter structure during flight. Failure of the IFS forward upper 
fire seal could cause the loss of seal pressurization and degrade 
the ability to detect and extinguish an engine fire, resulting in an 
uncontrolled fire. Damage to the TR insulation blanket could result 
in thermal damage to the TR inner wall, the subsequent release of 
engine exhaust components, and consequent damage to critical areas 
of the airplane. Furthermore, damage to the TR inner wall and IFS 
forward upper fire seal could compromise the integrity of the 
firewall and its ability to contain an engine fire, resulting in an 
uncontrolled fire.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Retained Actions, With New Service Information and Revised Affected 
Airplanes

    This paragraph restates the requirements of paragraph (g) of AD 
2020-26-08, with new service information and revised affected 
airplanes. For airplanes with an original airworthiness certificate 
or original export certificate of airworthiness issued on or before 
the effective date of this AD and for airplanes listed in Boeing 
Alert Requirements Bulletin B787-81205-SB720007-00 RB, Issue 001, 
dated December 12, 2022: Except as specified by paragraph (h) of 
this AD, at the applicable times specified in the ``Compliance'' 
paragraph of Boeing Alert Requirements Bulletin B787-81205-SB780041-
00 RB, Issue 001, dated March 31, 2020; or Boeing Alert Requirements 
Bulletin B787-81205-SB780041-00, Issue 002, dated December 21, 2021; 
do all applicable actions identified in, and in accordance with, the 
Accomplishment Instructions of Boeing Alert Requirements Bulletin 
B787-81205-SB780041-00 RB, Issue 001, dated March 31, 2020; or 
Boeing Alert Requirements Bulletin B787-81205-SB780041-00, Issue 
002, dated December 21, 2021. Accomplishing the actions required by 
paragraph (i)(2) of this AD terminates the actions required by this 
paragraph.
    Note 1 to paragraph (g): Guidance for accomplishing the actions 
required by paragraph (g) of this AD can be found in Boeing Alert 
Service Bulletin B787-81205-SB780041-00, Issue 001, dated March 31, 
2020, which is referred to in Boeing Alert Requirements Bulletin 
B787-81205-SB780041-00 RB, Issue 001, dated March 31, 2020; or in 
Boeing Alert Service Bulletin B787-81205-SB780041-00, Issue 002, 
dated December 21, 2021, which is referred to in Boeing Alert 
Requirements Bulletin B787-81205-SB780041-00, Issue 002, dated 
December 21, 2021.

(h) Retained Exceptions to Service Information Specifications in 
Paragraph (g) of This AD, With Added Reference to New Service 
Information

    This paragraph restates the exceptions specified in paragraph 
(h) of AD 2020-26-08, with added reference to new service 
information. Where Boeing Alert Requirements Bulletin B787-81205-
SB780041-00 RB, Issue 001, dated March 31, 2020; or Boeing Alert 
Requirements Bulletin B787-81205-SB780041-00, Issue 002, dated 
December 21, 2021; uses the phrase ``the Issue 001 date of 
Requirements Bulletin B787-81205-SB780041-00 RB,'' this AD requires 
using January 27, 2021, (the effective date of AD 2020-26-08).

(i) New Required Actions

    (1) For airplanes with original airworthiness certificate or 
original export certificate of airworthiness issued on or before the 
effective date of this AD and for airplanes listed in the Boeing 
Alert Requirements Bulletin B787-81205-SB720007-00 RB, Issue 001, 
dated December 12, 2022: Within 7 years after the effective date of 
this AD, or within 7 years after the date of issuance of the 
original airworthiness certificate or original export certificate of 
airworthiness, whichever occurs later, inspect to determine the part 
number of the upper splitter fairing assembly installed on each 
engine. A review of airplane maintenance records is acceptable in 
lieu of this inspection if the part number of the upper splitter 
fairing assembly can be conclusively determined from that review. 
For engines on which no upper splitter fairing assembly part number 
(P/N) KH60375 was found during the inspection, the actions required 
by paragraph (g) of this AD are no longer required for that engine.

[[Page 33855]]

    (2) If, during any inspection or records review required by 
paragraph (i)(1) of this AD, an upper splitter fairing assembly P/N 
KH60375 is found on any engine of an airplane: Except as specified 
by paragraph (j) of this AD, at the applicable times specified in 
the ``Compliance'' paragraph of Boeing Alert Requirements Bulletin 
B787-81205-SB720007-00 RB, Issue 001, dated December 12, 2022, do 
all applicable actions identified in, and in accordance with, the 
Accomplishment Instructions of Boeing Alert Requirements Bulletin 
B787-81205-SB720007-00 RB, Issue 001, dated December 12, 2022, for 
each affected engine. Accomplishing the actions required by this 
paragraph on all affected engines of an airplane terminates the 
actions required by paragraph (g) of this AD for that airplane.
    Note 2 to paragraph (i)(2): Guidance for accomplishing the 
actions required by this AD can be found in Boeing Alert Service 
Bulletin B787-81205-SB720007-00, Issue 001, dated December 12, 2022, 
which is referred to in Boeing Alert Requirements Bulletin B787-
81205-SB720007-00 RB, Issue 001, dated December 12, 2022.

(j) Exceptions to Service Information Specifications for Paragraph 
(i)(2) of This AD

    Where the ``Effectivity'' paragraph and the Condition and 
Compliance Time columns of the tables in the ``Compliance'' 
paragraph of Boeing Alert Requirements Bulletin B787-81205-SB720007-
00 RB, Issue 001, dated December 12, 2022, use the phrase ``the 
original issue date of Requirements Bulletin B787-81205-SB720007-00 
RB,'' this AD requires using ``the effective date of this AD.''

(k) Parts Installation Prohibition

    (1) For airplanes with an original airworthiness certificate or 
original export certificate of airworthiness issued after the 
effective date of this AD, except for airplanes listed in Boeing 
Alert Requirements Bulletin B787-81205-SB720007-00 RB, Issue 001, 
dated December 12, 2022: As of the effective date of this AD, no 
person may install an engine with an upper splitter fairing assembly 
P/N KH60375 on any airplane.
    (2) For airplanes with original airworthiness certificate or 
original export certificate of airworthiness issued on or before the 
effective date of this AD and for airplanes listed in Boeing Alert 
Requirements Bulletin B787-81205-SB720007-00 RB, Issue 001, dated 
December 12, 2022: At the applicable time specified in paragraph 
(k)(2)(i) or (ii) of this AD, no person may install an engine with 
an upper splitter fairing assembly P/N KH60375 on any airplane.
    (i) For airplanes on which no upper splitter fairing assembly P/
N KH60375 was found during the inspection required by paragraph 
(i)(1) of this AD: After accomplishing the inspection required by 
paragraph (i)(1) of this AD.
    (ii) For airplanes on which an upper splitter fairing assembly 
P/N KH60375 was found during the inspection required by paragraph 
(i)(1) of this AD: At the applicable time specified in paragraph 
(k)(2)(ii)(A) or (B) of this AD.
    (A) For an engine on which an upper splitter fairing assembly P/
N KH60375 was not found: After accomplishing the inspection required 
by paragraph (i)(1) of this AD.
    (B) For an engine on which an upper splitter fairing assembly P/
N KH60375 was found: After replacing an affected upper splitter 
fairing assembly part number with a new upper splitter fairing 
assembly part number for that engine as required by paragraph (i)(2) 
of this AD.

(l) 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 (m) 
of this AD. Information may be emailed to: [email protected].
    (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.

(m) Related Information

    For more information about this AD, contact Tak Kobayashi, 
Aerospace Engineer, Propulsion Section, West Certification Branch, 
FAA, 3960 Paramount Boulevard, Lakewood, CA 90712-4137; telephone: 
206-231-3553; email: [email protected].

(n) 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 the 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 Requirements Bulletin B787-81205-SB720007-00 
RB, Issue 001, dated December 12, 2022.
    (ii) Boeing Alert Requirements Bulletin B787-81205-SB780041-00, 
Issue 002, dated December 21, 2021.
    (4) The following service information was approved for IBR on 
January 27, 2021 (85 FR 83755, December 23, 2020).
    (i) Boeing Alert Requirements Bulletin B787-81205-SB780041-00 
RB, Issue 001, dated March 31, 2020.
    (ii) [Reserved]
    (5) For service information 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; 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 Street, 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 protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on May 8, 2023.
Gaetano A. Sciortino,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-11064 Filed 5-24-23; 8:45 am]
BILLING CODE 4910-13-P


