Airworthiness directives › 2013-05-18
AD 2013-05-18 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc (RR) RB211 Trent 553-61, RB211 Trent 553A2-61, RB211 Trent 556-61, RB211 Trent 556A2-61, RB211 Trent 556B-61, RB211 Trent 556B2-61, RB211 Trent 560-61, and RB211 Trent 560A2-61 turbofan engines that have any of the following fuel tube part numbers installed: FW57605, FW17689, FW57604, FK30710, FW57578, or FK30713.
Compliance
For the purpose of this AD, a shop visit is the induction of an engine into the shop for maintenance or overhaul. The separation of engine flanges solely for the purposes of transporting the engine without subsequent engine maintenance does not constitute an engine shop visit.
Required actions
You may take credit for the initial inspection required by paragraph (e)(1) of this AD if you performed the initial inspection before the effective date of this AD using RR Alert NMSB RB.211-73-AG948, dated September 28, 2012; RR NMSB RB.211-73-G723, dated September 26, 2011, or Revision 1, dated January 31, 2012; or RR Alert NMSB RB.211-73-AG797, dated October 26, 2011, or Revision 1, dated January 31, 2012, or Revision 2, dated June 13, 2012.
Unsafe condition
Unless already done, do the following actions. (1) Inspect the LP fuel system of engines that are on wing within 1,600 flight hours after February 24, 2012, or before the next flight after the effective date of this AD, whichever occurs later. Use the procedures in the Accomplishment Instructions, paragraph 3.A, of RR Alert Non-Modification Service Bulletin (NMSB) RB.211-73-AG948, dated September 28, 2012, to do the inspection. (2) For engines that are in shop for any reason, after the effective date of this AD, inspect the LP fuel system. Use the procedures in the Accomplishment Instructions, paragraph 3.B, of RR Alert NMSB RB.211-73-AG948, dated September 28, 2012, to do the inspection. (3) Thereafter, reinspect the LP fuel system within every 6,000 flight hours since last inspection. Reinspection may be on-wing or in the shop. Use the procedures in the Accomplishment Instructions, paragraph 3.A or 3.B, as appropriate, of RR Alert NMSB RB.211-73-AG948, dated September 28, 2012, to do the inspection. (4) If the LP fuel system fails the inspections required by this AD, replace the part(s) that failed the inspection with hardware eligible for installation.
Affected ADs
This AD supersedes AD 2012-02-04, Amendment 39-16927 (77 FR 6668, February 9, 2012).
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