AD 2019-16-14

(a) Effective Date

    This AD is effective September 11, 2019.

(b) Affected ADs

    This AD replaces AD 2018-25-01, Amendment 39-19511 (83 FR 62694, 
December 6, 2018).

(c) Applicability

    This AD applies to all Rolls-Royce Deutschland Ltd. & Co KG 
(RRD) 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 turbofan 
model engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section.

(e) Unsafe Condition

    This AD was prompted by reports of intermediate-pressure 
compressor (IPC) rotor blade cracks, which could lead to rotor blade 
separations resulting in engine failures. The FAA is issuing this AD 
to prevent failure of the IPC. The unsafe condition, if not 
addressed, 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

    (1) Within 15 days of the effective date of this AD, or within 
the compliance times specified in the Accomplishment Instructions, 
Table 1, of Rolls-Royce plc (RR) Alert Non-Modification Service 
Bulletin (NMSB) Trent 1000 72-AK130, Revision 4, dated March 4, 2019 
(``RR Alert NMSB Trent 100 72-AK130''), whichever occurs later, 
perform an on-wing inspection of the IPC stage 1 rotor (R1) blades 
in accordance with the Accomplishment Instructions, paragraph 
3.A.(1), of RR Alert NMSB Trent 1000 72-AK130.
    (2) Thereafter, repeat the on-wing inspections of the IPC R1 
blades using the Accomplishment Instructions, paragraph 3.A.(1), and 
within the compliance times specified in the Accomplishment 
Instructions, Table 1, of RR Alert NMSB Trent 1000 72-AK130.
    (3) Within 15 days of the effective date of this AD, or before 
exceeding the applicable threshold defined in the Accomplishment 
Instructions, Table 2 or Table 3, of RR Alert NSMB 72-AK130, 
whichever occurs later, perform an on-wing inspection of the IPC 
stage 2 rotor (R2) blades and IPC shaft stage 2 dovetail posts in 
accordance with the Accomplishment Instructions, paragraphs 3.B.(1) 
and 3.C.(1), of RR Alert NMSB Trent 1000 72-AK130.
    (4) After performing the inspection in paragraph (g)(3) of this 
AD, repeat the on-wing inspections of IPC R2 blades and IPC shaft 
stage 2 dovetail posts using paragraphs 3.B.(1) and 3.C.(1) of RR 
Alert NMSB Trent 1000 72-AK130 and within the compliance times 
specified in the Accomplishment Instructions, Table 2 and Table 3, 
of RR Alert NMSB Trent 1000 72-AK130.
    (5) For any on-wing inspection required by paragraphs (g)(1) 
through (4) of this AD, provided the stated thresholds and intervals 
are not exceeded, you may substitute:
    (i) An in-shop inspection of an engine or module performed in 
accordance with the instructions of the Accomplishment Instructions, 
paragraphs 3.A.(2), 3.B.(2), and 3.C.(2) of the RR Alert NMSB Trent 
1000 72-AK130, Revision 4, dated March 4, 2019; or
    (ii) An in-shop piece part inspection during refurbishment in 
accordance with the Accomplishment Instructions, paragraphs 
3.B.(2)(f)(vi), 3.B.(2)(g)(v), 3.B.(3)(d)(iii) of RR NMSB Trent 1000 
72-K132, Revision 2, dated March 26, 2019.
    (6) If any IPC R1 blade, IPC R2 blade, or IPC shaft stage 2 
dovetail post is found cracked during any inspection (on-wing or

[[Page 44686]]

in-shop) required by this AD, remove the cracked part from service 
and replace with a part eligible for installation before further 
flight.

(h) Inspection After Operation Under Asymmetric Power

    As of the effective date of this AD, before the next flight 
after each occurrence where engine operation in asymmetric power 
conditions was sustained for more than 30 minutes at less than 
25,000 feet, either resulting from engine power reduction or from 
engine in-flight shut-down (IFSD), inspect the IPC R1 blades, the 
IPC R2 blades, and the IPC shaft stage 2 dovetail posts in 
accordance with the Accomplishment Instructions, paragraphs 3.A.(1), 
3.B.(1), and 3.C.(1), of RR Alert NMSB Trent 1000 72-AK130, Revision 
4, dated March 4, 2019, on the engine that did not experience the 
power reduction or IFSD installed on the airplane.

(i) Credit for Previous Actions

    You may take credit for the inspections required by paragraphs 
(g)(1) and (3) of this AD if you performed these inspections before 
the effective date of this AD using RR Alert NMSB Trent 1000 72-
AK130, Revision 3, dated January 10, 2019, or earlier revisions.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, ECO 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 
certification office, send it to the attention of the person 
identified in paragraph (l) of this AD. You may email your request 
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) Related Information

    (1) For more information about this AD, contact Dorie Resnik, 
Aerospace Engineer, Boston ACO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7693; fax: 781-238-7199; email: 
[email protected].
    (2) Refer to European Union Aviation Safety Agency (EASA) AD 
2019-0075, dated March 29, 2019, for more information. You may 
examine the EASA AD in the AD docket on the internet at http://www.regulations.gov by searching for and locating it in Docket No. 
FAA-2019-0528.

(l) 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.
    (i) Rolls-Royce plc (RR) Alert Non-Modification Service Bulletin 
(NMSB) Trent 1000 72-AK130, Revision 4, dated March 4, 2019.
    (ii) RR NMSB Trent 1000 72-K132, Revision 2, dated March 26, 
2019.
    (3) For RR service information identified in this AD, contact 
Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, 
United Kingdom, DE24 8BJ; phone: 011-44-1332-242424; fax: 011-44-
1332-249936; email: royce.com">corporate.care@rolls-royce.com; internet: 
https://customers.rolls-royce.com/public/rollsroycecare.
    (4) You may view this service information at FAA, Engine and 
Propeller Standards Branch, 1200 District Avenue, Burlington, MA 
01803. For information on the availability of this material at the 
FAA, call 781-238-7759.
    (5) You may view this service information at the National 
Archives and Records Administration (NARA). For information on the 
availability of this material at NARA, call 202-741-6030, or go to: 
http://www.archives.gov/federal-register/cfr/ibr-locations.html.