Airworthiness Directive · Amendment 39-17390 · Rolls-Royce plc Turbofan Engines
Rolls-Royce plc Turbofan Engines
Superseded. A later AD replaced this one: AD 2017-03-03. Comply with the one in force.
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.
We are superseding an existing airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211 Trent 500 series turbofan engines. That AD currently requires a one-time inspection of the fuel tubes and fuel tube clips for evidence of damage, wear, and fuel leakage. This AD requires the same inspection, and adds additional repetitive inspections. This AD was prompted by additional RR engineering analysis. We are issuing this AD to prevent engine fuel leaks, which could result in engine damage and damage to the airplane.
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.
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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
