Action
Notice of proposed rulemaking (NPRM).
Summary
We propose to adopt a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. This proposed AD was prompted by fuel leaks caused by damage to the fan case low-pressure (LP) fuel tube. This proposed AD would require inspection of the fan case LP fuel tubes and associated clips and the fuel oil heat exchanger (FOHE) mounts and associated hardware. We are proposing this AD to prevent failure of the fan case LP fuel tube, which could lead to an in-flight shutdown of one or more engines due to fuel starvation, loss of thrust control, and damage to the airplane.