AD 2017-10-19

(a) Effective Date

    This AD is effective July 20, 2017.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Rolls-Royce plc (RR) Trent 1000-A2, Trent 
1000-C2, Trent 1000-D2, Trent 1000-E2, Trent 1000-G2, Trent 1000-H2, 
Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 turbofan engines 
with intermediate pressure compressor (IPC) rotor seal, part number 
(P/N) KH19098, installed.

(d) Subject

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

(e) Reason

    This AD was prompted by failure of the IPC rotor seal. We are 
issuing this AD to prevent failure of the IPC rotor seal, loss of 
engine thrust control, and reduced control of the airplane.

(f) Compliance

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

(g) Required Actions

    (1) Perform an on-wing borescope inspection (BSI) of the IPC 
rotor seal using paragraph 3, Accomplishment Instructions, of RR 
Alert Non-Modification Service Bulletin (NMSB) Trent 1000 72-AJ467, 
Revision 1, dated February 13, 2017 as follows:
    (i) For engines with an IPC rotor seal with 300 flight cycles 
(FC) or more before August 2017, perform a BSI before August 2017.
    (ii) For engines with an IPC rotor seal with less than 300 FC 
before August 2017, perform a BSI before the IPC rotor seal 
accumulates 300 FC.
    (2) Depending on the findings of the inspection(s) required by 
paragraph (g)(1) of this AD, repeat the on-wing BSI at intervals not 
to exceed those specified in Figures 2 or 4 of RR Alert NMSB Trent 
1000 72-AJ467, Revision 1, dated February 13, 2017.
    (3) An in-shop inspection in accordance with paragraph 3, 
Accomplishment Instructions, of RR NMSB Trent 1000 72-J353, Revision 
1, dated November 24, 2016, may be substituted for an on-wing BSI as 
required by paragraphs (g)(1) and (2) of this AD, within the 
compliance times specified.
    (4) After the effective date of this AD, do not operate an 
aircraft, having two engines installed that are both subject to the 
20 FC IPC rotor seal re-inspection interval specified in Figure 4 of 
RR Alert NMSB Trent 1000 72-AJ467, Revision 1, dated February 13, 
2017.
    (5) If, during an on-wing inspection as required by paragraphs 
(g)(1) or (2) of this AD, or an in-shop inspection as specified in 
paragraph (g)(3) of this AD, any crack is found on the rear face of 
the affected IPC rotor seal that is at or beyond the reject limits 
specified in Figure 4 of RR Alert NMSB Trent 1000 72-AJ467, Revision 
1, dated February 13, 2017, replace the IPC rotor seal with a part 
eligible for installation, before next flight.
    (6) Replacing the IPC rotor seal on an engine, as required by 
paragraph (g)(5) of this AD, is not terminating action for the 
inspections required by paragraphs (g)(1) and (2) of this AD for 
that engine.
    (7) No reports requested in any of the Alert NMSBs that are 
referenced in paragraphs (g)(1), (2), and (3) of this AD are 
required by this AD.

(h) Credit for Previous Actions

    You may take credit for inspections and corrective action that 
are required by paragraph (g) of this AD, if you performed these 
actions and corrective action before the effective date of this AD, 
using RR Alert NMSB Trent 1000 72-AJ467, Initial Issue, dated 
November 9. 2016; or RR NMSB Trent 1000 72-J353, Initial Issue, 
dated August 25, 2016, or Revision 1, dated November 24, 2016.

(i) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
for this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: [email protected].

(j) Related Information

    (1) For more information about this AD, contact Robert Green, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; 
phone: 781-238-7754; fax: 781-238-7199; email: [email protected].
    (2) Refer to MCAI AD 2017-0017, dated February 1, 2017, for more 
information. You may examine the MCAI in the AD docket on the 
Internet at http://www.regulations.gov by searching for and locating 
it in Docket No. FAA-2017-0187.

(k) 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) Non-Modification Service Bulletin 
(NMSB) Trent 1000 72-J353, Revision 1, dated November 24, 2016.
    (ii) RR Alert NMSB Trent 1000 72-AJ467, Revision 1, dated 
February 13, 2017.
    (3) For RR service information identified in this AD, contact 
Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, 
England, DE24 8BJ; phone: 011-44-1332-242424; fax: 011-44-1332-
249936; email: http://www.rolls-royce.com/contact/civil_team.jsp; 
Internet: https://customers.rolls-royce.com/public/rollsroycecare.
    (4) You may view this service information at FAA, Engine & 
Propeller Directorate, 1200

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District Avenue, Burlington, MA 01803. For information on the 
availability of this material at the FAA, call 781-238-7125.
    (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.