AD 2023-12-16

(a) Effective Date

    This airworthiness directive (AD) is effective August 15, 2023.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to certain Rolls-Royce Deutschland Ltd & Co KG 
(RRD) Model Trent 1000-AE3, Trent 1000-CE3, Trent 1000-D3, Trent 
1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, 
Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, and 
Trent 1000-R3 engines, as identified in European Union Aviation 
Safety Agency (EASA) AD 2022-0241, dated December 7, 2022 (EASA AD 
2022-0241).

(d) Subject

    Joint Aircraft System Component (JASC) Code 7240, Turbine Engine 
Combustion Section.

(e) Unsafe Condition

    This AD was prompted by reports of excessive wear on the inner 
seal fins of certain high-pressure turbine (HPT) triple seals. The 
FAA is issuing this AD to prevent excessive wear on the inner seal 
fins of certain HPT triple seals. The unsafe condition, if not 
addressed, could lead to a temperature increase at the intermediate-
pressure turbine (IPT) disk rim, possibly resulting in IPT disk 
failure and high energy debris release, with consequent damage to 
the airplane and reduced control of the airplane.

(f) Compliance

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

(g) Required Actions

    Except as specified in paragraphs (h) and (i) of this AD: 
Perform all required actions within the compliance times specified 
in, and in accordance with, EASA AD 2022-0241.

(h) Exceptions to EASA AD 2022-0241

    (1) Where EASA AD 2022-0241 refers to its effective date, this 
AD requires using the effective date of this AD.
    (2) This AD does not adopt the Remarks paragraph of EASA AD 
2022-0241.

(i) No Reporting Requirement

    Although EASA AD 2022-0241 specifies to submit inspection 
results to the manufacturer, this AD does not include that 
requirement.

(j) 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 local 
Flight Standards District Office, as appropriate. If sending 
information directly to the manager of the branch office, send it to 
the attention of the person identified in paragraph (k) of this AD 
and email to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(k) Additional Information

    For more information about this AD, contact Sungmo Cho, Aviation 
Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; 
phone: (781) 238-7241; email: [email protected].

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference 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.
    (i) European Union Aviation Safety Agency AD 2022-0241, dated 
December 7, 2022.
    (ii) [Reserved]
    (3) For EASA AD 2022-0241, contact EASA, Konrad-Adenauer-Ufer 3, 
50668 Cologne, Germany; phone: +49 221 8999 000; email: 
[email protected]; website: easa.europa.eu. You may find this 
material on the EASA website at ad.easa.europa.eu.
    (4) You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 1200 
District Avenue, Burlington, MA 01803. For information on the 
availability of this material at the FAA, call (817) 222-5110. This 
material may be found in the AD docket at regulations.gov by 
searching for and locating Docket No. FAA-2023-0660.

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    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email: [email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.