```

[Federal Register Volume 90, Number 28 (Wednesday, February 12, 2025)]
[Rules and Regulations]
[Pages 9382-9386]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-02382]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-2137; Project Identifier AD-2023-00297-T; 
Amendment 39-22932; AD 2025-01-08]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2019-22-
02, which applied to all The Boeing Company Model 747-200B, 747-200C, 
747-200F, 747-300, 747-400, 747-400D, 747-400F, 747-8F, and 747-8 
series airplanes. AD 2019-22-02 required identifying the part number, 
and the serial number if applicable, of the Captain's and First 
Officer's seats, and applicable on-condition actions for affected 
seats. AD 2019-22-02 also required 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 on-condition 
actions. This AD was prompted by reports of uncommanded fore and aft 
movement of the Captain's and First Officer's seats. This AD requires 
the actions in AD 2019-22-02 and adds an inspection of previously 
omitted part numbers. The FAA is issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective March 19, 2025.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of March 19, 
2025.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-2137; 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 final rule, any comments received, and other 
information. The address for Docket Operations is U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
    Material Incorporated by Reference:
     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.
     You may view this material at the FAA, Airworthiness 
Products Section, Operational Safety Branch, 2200 South 216th St., Des 
Moines, WA. For information on the availability of this material at the 
FAA, call 206-231-3195. It is also available at regulations.gov under 
Docket No. FAA-2024-2137.

FOR FURTHER INFORMATION CONTACT: Courtney Tuck, Aviation Safety 
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone 
206-231-3986; email [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to supersede AD 2019-22-02, Amendment 39-19781 (84 FR 
67854, December 12, 2019) (AD 2019-22-02). AD 2019-22-02 applied to all 
The Boeing Company Model 747-200B, 747-200C, 747-200F, 747-300, 747-
400, 747-400D, 747-400F, 747-8F, and 747-8 series airplanes. The NPRM 
published in the Federal Register on September 9, 2024 (89 FR 73014). 
The NPRM was prompted by reports of uncommanded fore and aft movement 
of the Captain's and First Officer's seats. In the NPRM, the FAA 
proposed to continue to require the actions in AD 2019-22-02 and add an 
inspection of previously omitted part numbers. The FAA is issuing this 
AD 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.

Discussion of Final Airworthiness Directive

Comments

    The FAA received a comment from the Air Line Pilots Association, 
International, who supported the NPRM without change.
    The FAA received additional comments from United Parcel Service Co. 
(UPS). The following presents the comments received on the NPRM and the 
FAA's response to each comment.

Request To Correct Service Date

    United requested that the date on Boeing Special Attention Service 
Bulletin 747-25-3653, Revision 1, be corrected to read October 19, 
2018. UPS commented that table 1 to paragraph (j) in the proposed AD 
lists Boeing Special Attention Service Bulletin 747-25-3653, Revision 
1, with the incorrect date of October 18, 2018.
    The FAA agrees that Boeing Service Bulletin 747-25-3653, Revision 
1, called out three times in table 1 to paragraph (j) of this AD, 
should have the revision date of October 19, 2018, not October 18, 
2018. The correct date has been reflected in this AD.

Request To Add Missing Ipeco Service Bulletin Issue to Table 1

    UPS requested that all references in table 1 to paragraph (j) in 
the proposed AD related to IPECO SB 258-25-08 should say ``IPECO SB 
258-25-08, Issue 4 or later.'' UPS noted that in table 1 to paragraph 
(j) in the proposed AD for IPECO P/N 3A258-0041-01-1 or 3A258-0042-01-
1, only Issues 5 and 6 of IPECO SB 258-25-08 are identified for 
installation. Boeing Service Bulletin 747-25-3644, Revision 1, dated 
July 17, 2018, also listed the accomplishment of IPECO SB 258-25-08, 
Issue 4, along with Issues 5 and 6. Issues 4, 5, and 6 of this service 
bulletin all list the same work steps for accomplishment for the

[[Page 9383]]

IPECO P/N 3A258-0041-01-1 or 3A258-0042-01-1 seats.
    The FAA agrees with the request and has included in this AD Ipeco 
SB 258-25-08, Issue 4, dated April 25, 2014, in Table 1 to paragraph 
(j) of this AD for Ipeco P/N 3A258-0041-01-1 or 3A258-0042-01-1.

Request To Clarify Intent of Service Bulletin 747-25-3644

    UPS stated that paragraph (j) lacks details to ensure the operators 
understand the intent of table 1 to paragraph (j) in the proposed AD 
for Service Bulletin 747-25-3644. UPS therefore requested that table 1 
to paragraph (j) in the proposed AD state that no further actions are 
required if the operator has completed either action in the applicable 
IPECO service bulletin or the performed manual override cable 
maintenance in accordance with the component maintenance manual.
    The FAA disagrees to revise paragraph (j) of this AD. Boeing SB 
747-25-3644 Revision 1, dated July 17, 2018, states that if the 
applicable Ipeco P/N has a serial number identified by the effectivity 
of the applicable Ipeco service bulletin and the manual override cable 
maintenance has been completed on the seat in accordance with the Ipeco 
CMM listed in the table, no further action is required for this seat. 
The Ipeco service bulletin also state whether the Ipeco service 
bulletin does not apply to those seats where maintenance logs show that 
the cables have been inspected, replaced, or adjusted per the 
applicable CMM. The FAA has not changed this AD as a result of this 
comment.

Request To Change the Wording in Column Headers

    UPS requested that the wording ``Installation per Boeing Special 
Attention SB'' and ``Installation per IPECO SB'' for column headers 
should be titled ``Work Accomplished in accordance with . . . .'' UPS 
stated these documents are provided for guidance to the operators on 
how to comply with a safety issue.
    The FAA agrees to change the headings for the first two columns of 
table 1 to paragraph (j) of this AD to ``Actions done in accordance 
with Boeing Special Attention Service Bulletin'' and ``Actions done in 
accordance with Ipeco Service Bulletin.''

Conclusion

    The FAA reviewed the relevant data, considered any comments 
received, and determined that air safety requires adopting this AD as 
proposed. Accordingly, the FAA is issuing this AD to address the unsafe 
condition on these products. Except for minor editorial changes, and 
any other changes described previously, this AD is adopted as proposed 
in the NPRM. None of the changes will increase the economic burden on 
any operator.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed Boeing Special Attention Service Bulletin 747-25-
3644, Revision 2, dated January 27, 2023. This material specifies 
procedures for identification of the part number, and the serial number 
if applicable, of the Captain's and First Officer's seats, and 
applicable on-condition 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 3A258-0041-01-1Z and 3A258-0042-01-1Z.
    The FAA also reviewed Boeing Special Attention Service Bulletin 
747-25-3653, 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. This material also describes procedures for an 
optional terminating action for the repetitive checks by installing a 
serviceable Captain's or First Officer's seat.
    This material is reasonably available because the interested 
parties have access to it through their normal course of business or by 
the means identified in the ADDRESSES section.

Costs of Compliance

    The FAA estimates that this AD affects 162 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                                      Estimated Costs for Required Actions per Seat
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                  Parts
                Action                        Labor cost          cost               Cost per product                     Cost on U.S. operators
--------------------------------------------------------------------------------------------------------------------------------------------------------
Identification, seat (retained         1 work-hour x $85 per          $0  $85...................................  Up to $117,980.
 actions from AD 2019[dash]22-02).      hour = $85.
Detailed inspection, HMS (retained     1 work-hour x $85 per           0  $85...................................  $27,540.
 actions from AD 2019[dash]22-02).      hour = $85.
Checks, HMS (retained actions from AD  2 work-hours x $85 per          0  $170 per check cycle..................  $55,080 per check cycle.
 2019-22-02).                           hour = $170 per check
                                        cycle.
--------------------------------------------------------------------------------------------------------------------------------------------------------

    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 on-condition 
actions:

                                    Estimated Costs of On-Condition Actions *
----------------------------------------------------------------------------------------------------------------
            Action                Labor cost                Parts cost                   Cost per product
----------------------------------------------------------------------------------------------------------------
Adjustment, control lever      1 work-hour x     $0.............................  $85.
 cable.                         $85 per hour =
                                $85.
Overhaul, HMS................  11 work-hours x   Up to $5,824...................  Up to $6,759.
                                $85 per hour =
                                $935.
Inspection of each seat's      1 work-hour x     $0.............................  $85 per seat.
 fore/aft and vertical manual   $85 per hour =
 control levers.                $85 per seat.
Installation of serviceable    1 work-hour x     $0.............................  $85 per seat.
 seats.                         $85 per hour =
                                $85 per seat.

[[Page 9384]]

 
Clearing FOD.................  1 work-hour x     $0.............................  $85 per seat.
                                $85 per hour =
                                $85 per seat.
Replacement of the horizontal  1 work-hour x     $7,937 per actuator............  $8,022 per actuator.
 actuator.                      $85 per hour =
                                $85 per
                                actuator.
Operational test, adjusted     1 work-hour x     $0.............................  $85 per seat.
 control lever cable.           $85 per hour =
                                $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 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

    This AD will not have federalism implications under Executive Order 
13132. This AD will 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 this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) Will 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 Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 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) 2019-22-02, Amendment 39-19781 
(84 FR 67854, December 12, 2019) (AD 2019-22-02); and
0
b. Adding the following new AD:

2025-01-08 The Boeing Company: Amendment 39-22932; Docket No. FAA-
2024-2137; Project Identifier AD-2023-00297-T.

(a) Effective Date

    This airworthiness directive (AD) is effective March 19, 2025.

(b) Affected ADs

    This AD replaces AD 2019-22-02, Amendment 39-19781 (84 FR 67854, 
December 12, 2019) (AD 2019-22-02).

(c) Applicability

    This AD applies to all The Boeing Company Model 747-200B, 747-
200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747-8F, and 
747-8 series airplanes, certificated in any category.

(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 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 Service Bulletin 747-25-3644, 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 identified in, and in 
accordance with the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 747-25-3644, 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.

(h) Detailed Inspection, and Repetitive Checks of Horizontal Movement 
System and On-Condition Actions

    Except as specified by paragraph (i) and (j) of this AD: At the 
applicable times specified in the ``Compliance'' paragraph of Boeing 
Special Attention Bulletin 747-25-3653, 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 747-25-3653, 
Revision 2, dated January 27, 2023. Actions identified as 
terminating action in Boeing Special Attention Service Bulletin 747-
25-3653, 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 747-25-3653, Revision 2, 
dated January 27, 2023.

[[Page 9385]]

(i) Exceptions to Service Information Specifications

    (1) Where the ``Compliance'' paragraph of Boeing Special 
Attention Bulletin 747-25-3653, Revision 2, dated January 27, 2023, 
refers to the original issue date of this bulletin, this AD requires 
using January 16, 2020 (the effective date of AD 2019-22-02).
    (2) Where the ``Compliance'' paragraph of Boeing Special 
Attention Bulletin 747-25-3644, Revision 2, dated January 27, 2023, 
refers to 72 months after the original issue date of this service 
bulletin, this AD requires using 36 months after January 16, 2020 
(the effective date of AD 2019-22-02).
    (3) Where the ``Compliance'' paragraph of Boeing Special 
Attention Bulletin 747-25-3644, Revision 2, dated January 27, 2023, 
refers to the Revision 2 date of this service bulletin, this AD 
requires using the effective date of the 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 table 1 to 
paragraph (j) of this AD, the actions specified in paragraphs (g) 
and (h) of this AD are not required for that seat.

                             Table 1 to Paragraph (j)--Alternative Acceptable Seats
----------------------------------------------------------------------------------------------------------------
   Actions done in accordance with         Actions done in
   Boeing Special Attention Service     accordance with Ipeco      Having Ipeco P/N--    And additional required
              Bulletin--                  Service Bulletin--                                   conditions--
----------------------------------------------------------------------------------------------------------------
747-25-3644, Revision 1, dated July    None...................  3A258-0041-01-2 or       No additional
 17, 2018.                                                       3A258-0042-01-2.         conditions required.
747-25-3644, Revision 1, dated July    097-25-02, Issue 1,      3A090-0027-01-1 or       The manual override
 17, 2018.                              dated October 2, 2013;   3A090-0028-01-1.         cable maintenance has
                                        or Issue 2, dated                                 been completed on the
                                        March 28, 2014; or                                seat in accordance
                                        Issue 3, dated March                              with the Ipeco
                                        4, 2020.                                          Component Maintenance
                                                                                          Manual 25-10-94,
                                                                                          Revision 10, dated
                                                                                          September 13, 2019, or
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 15, dated
                                                                                          August 10, 2021.
747-25-3644, Revision 1, dated July    107-25-03, Issue 1,      3A090-0055-01-1 or       The manual override
 17, 2018.                              dated October 2, 2013;   3A090-0056-01-1.         cable maintenance has
                                        or Issue 2, dated                                 been completed on the
                                        March 28, 2014; or                                seat in accordance
                                        Issue 3, dated March                              with the Ipeco
                                        4, 2020.                                          Component Maintenance
                                                                                          Manual 25-10-97,
                                                                                          Revision 14, dated
                                                                                          December 5, 2013, and
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 22, dated
                                                                                          March 19, 2021.
747-25-3644, Revision 1, dated July    112-25-02, Issue 1,      3A090-0065-01-1 or       The manual override
 17, 2018.                              dated November 4,        3A090-0066-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 18, 2020; or                                Component Maintenance
                                        Issue 4, dated May 7,                             Manual 25-11-01,
                                        2021.                                             Revision 9, dated
                                                                                          September 20, 2013,
                                                                                          and subsequent
                                                                                          revisions up to and
                                                                                          including Revision 18,
                                                                                          dated December 19,
                                                                                          2021.
747-25-3644, Revision 1, dated July    209-25-02, Issue 1,      3A090-0075-01-1 or       The manual override
 17, 2018.                              dated November 13,       3A090-0076-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 4, 2020.                                    Component Maintenance
                                                                                          Manual 25-11-32,
                                                                                          Revision 4, dated
                                                                                          September 27, 2013,
                                                                                          and subsequent
                                                                                          revisions up to and
                                                                                          including Revision 9,
                                                                                          dated July 23, 2020.
747-25-3644, Revision 1, dated July    211-25-04, Issue 1,      3A090-0079-01-1 or       The manual override
 17, 2018.                              dated November 4,        3A090-0080-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 4, 2020.                                    Component Maintenance
                                                                                          Manual 25-10-79,
                                                                                          Revision 23, dated
                                                                                          September 5, 2013, and
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 31, dated
                                                                                          July 23, 2020.
747-25-3644, Revision 1, dated July    212-25-03, Issue 1,      3A090-0081-01-1 or       The manual override
 17, 2018.                              dated November 4,        3A090-0082-01-1.         cable maintenance has
                                        2013; or Issue 2,                                 been completed on the
                                        dated March 28, 2014;                             seat in accordance
                                        or Issue 3, dated                                 with the Ipeco
                                        March 4, 2020.                                    Component Maintenance
                                                                                          Manual 25-10-80,
                                                                                          Revision 9, dated
                                                                                          September 27, 2013,
                                                                                          and subsequent
                                                                                          revisions up to and
                                                                                          including Revision 15,
                                                                                          dated July 23, 2020.
747-25-3644, Revision 1, dated July    258-25-08, Issue 4,      3A258-0041-01-1 or       Does not have a serial
 17, 2018.                              dated April 25, 2014;    3A258-0042-01-1.         number identified by
                                        or Issue 5, dated                                 the effectivity of the
                                        March 4, 2020; or                                 referenced Ipeco
                                        Issue 6, dated January                            Service Bulletins.
                                        28, 2021.
747-25-3644, Revision 1, dated July    258-25-08, Issue 4,      3A258-0041-01-1 or       The manual override
 17, 2018.                              dated April 25, 2014;    3A258-0042-01-1.         cable maintenance has
                                        or Issue 5, dated                                 been completed on the
                                        March 4, 2020; or                                 seat in accordance
                                        Issue 6, dated January                            with the Ipeco
                                        28, 2021.                                         Component Maintenance
                                                                                          Manual 25-11-38,
                                                                                          Revision 21, dated
                                                                                          December 12, 2013, or
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 53, dated
                                                                                          December 4, 2023.
747-25-3644, Revision 1, dated July    258-25-08, Issue 6,      3A258-0041-01-1Z or      Does not have a serial
 17, 2018.                              dated January 28, 2021.  3A258-0042-01-1Z.        number identified by
                                                                                          the effectivity of the
                                                                                          referenced Ipeco
                                                                                          Service Bulletin.
747-25-3644, Revision 1, dated July    258-25-08, Issue 6,      3A258-0041-01-1Z or      The manual override
 17, 2018.                              dated January 28, 2021.  3A258-0042-01-1Z.        cable maintenance has
                                                                                          been completed on the
                                                                                          seat in accordance
                                                                                          with the Ipeco
                                                                                          Component Maintenance
                                                                                          Manual 25-11-38,
                                                                                          Revision 21, dated
                                                                                          December 12, 2013, or
                                                                                          subsequent revisions
                                                                                          up to and including
                                                                                          Revision 53, dated
                                                                                          December 4, 2023.
747-25-3653, Revision 1, dated         None...................  3A258-0041-01-2, 3A258-  No additional
 October 19, 2018.                                               0041-01-1Z, 3A258-0042-  conditions required.
                                                                 01-2 or 3A258-0042-01-
                                                                 1Z.
747-25-3653, Revision 1, dated         258-25-13, Issue 3,      3A258-0041-01-1 or       Has a horizontal
 October 19, 2018.                      dated November 27,       3A258-0042-01-1.         actuator with Artus
                                        2017; or Issue 4,                                 part number AD8650503
                                        dated April 28, 2020,                             at ``Amendment C'' or
                                        or Issue 5; dated                                 later.
                                        November 1, 2021.
747-25-3653, Revision 1, dated         258-25-14, Issue 4,      3A258-0041-01-1 or       Has a horizontal
 October 19, 2018.                      dated January 29,        3A258-0042-01-1.         actuator with Artus
                                        2018; or Issue 5,                                 part number AD8650503
                                        dated April 28, 2020.                             at ``Amendment C'' or
                                                                                          later.
----------------------------------------------------------------------------------------------------------------

[[Page 9386]]

(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: [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.
    (4) AMOCs approved for AD 2019-22-02 are approved as AMOCs for 
the corresponding provisions of Boeing Special Attention Service 
Bulletin 747-25-3644, Revision 2, dated January 27, 2023, and Boeing 
Special Attention Service Bulletin 747-25-3653, 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 Moines, 
WA 98198; phone 206-231-3986; email [email protected].

(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 747-25-3644, 
Revision 2, dated January 27, 2023.
    (ii) Boeing Special Attention Service Bulletin 747-25-3653, 
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 [email protected].

    Issued on January 29, 2025.
Suzanne Masterson,
Deputy Director, Integrated Certificate Management Division, Aircraft 
Certification Service.
[FR Doc. 2025-02382 Filed 2-11-25; 8:45 am]
BILLING CODE 4910-13-P
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