AD 2023-21-08

(a) Effective Date

    This airworthiness directive (AD) is effective December 19, 
2023.

(b) Affected ADs

    This AD replaces AD 2021-21-13, Amendment 39-21773 (86 FR 64066, 
November 17, 2021).

(c) Applicability

    This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) 
Model Trent 1000-A, Trent 1000-AE, Trent 1000-C, Trent 1000-CE, 
Trent 1000-D, Trent 1000-E, Trent 1000-G, and Trent 1000-H engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7200, Engine 
(Turbine/Turboprop).

(e) Unsafe Condition

    This AD was prompted by the manufacturer revising the engine 
Time Limits Manual life limits of certain critical rotating parts. 
The FAA is issuing this AD to prevent the failure of critical 
rotating parts. The unsafe condition, if not addressed, could result 
in failure of critical rotating parts, which could result in failure 
of one or more engines, loss of thrust control, and loss of the 
airplane.

(f) Compliance

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

(g) Required Actions

    Except as specified in paragraph (h) of this AD: Perform all 
required actions within the compliance times specified in, and in 
accordance with, European Union Aviation Safety Agency (EASA) AD 
2022-0259, dated December 20, 2022 (EASA AD 2022-0259).

(h) Exceptions to EASA AD 2022-0259

    (1) Where EASA AD 2022-0259 defines the AMP as the Aircraft 
Maintenance Programme, which contains the tasks on the basis of 
which the scheduled maintenance is conducted to ensure the 
continuing airworthiness of each operated engine, this AD defines 
the AMP as the Aircraft Maintenance Program, which contains the 
tasks of which the operator or the owner ensures the continuing 
airworthiness of each operated airplane.
    (2) Where EASA AD 2022-0259 refers to its effective date, this 
AD requires using the effective date of this AD.
    (3) This AD does not require compliance with paragraph (1) of 
EASA AD 2022-0259.
    (4) This AD does not require compliance with paragraph (2) of 
EASA AD 2022-0259.
    (5) Where paragraph (3) of EASA AD 2022-0259 specifies revising 
the approved Aircraft Maintenance Programme within 12 months after 
the effective date of EASA AD 2022-0259, this AD requires revising 
the airworthiness limitations section of the existing approved 
maintenance or inspection program, as applicable, within 90 days 
after the effective date of this AD.
    (6) This AD does not adopt the ``Remarks'' paragraph of EASA AD 
2022-0259.

(i) Provisions for Alternative Actions and Intervals

    After performing the actions required by paragraph (g) of this 
AD, no alternative actions and associated thresholds and intervals, 
including life limits, are allowed unless they are approved as 
specified in the provisions of the ``Ref. Publications'' section of 
EASA AD 2022-0259.

(j) Alternative Methods of Compliance (AMOCs)

    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 AIR-520 Continued Operational Safety 
Branch, send it to the attention of the person identified in 
paragraph (k) of this AD and email to: [email protected]. 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].

[[Page 77891]]

(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 (EASA) AD 2022-0259, 
dated December 20, 2022.
    (ii) [Reserved]
    (3) For EASA AD 2022-0259, 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 EASA 
AD on the EASA website at ad.easa.europa.eu.
    (4) You may view this service information at 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 under Docket No. FAA-2023-1490.
    (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].