Summary
We propose to supersede airworthiness directive (AD) 2015-04- 03 that applies to certain Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. AD 2015-04-03 requires inspection of the sealing sleeve on the high-pressure/intermediate-pressure (HP/ IP) turbine support internal oil feed tube and removal of those sealing sleeves affected by AD 2015-04-03. This proposed AD would require removal of either the affected sealing sleeve only or both the affected sealing sleeve and the oil feed tube. We are proposing this AD to prevent failure of the HP/IP turbine support internal oil feed tube, which could lead to uncontained engine failure and damage to the airplane.