A proposal is not in force. If adopted, it becomes an AD, usually with changes. Only the Federal Register edition is official.
Summary
We propose to supersede airworthiness directive (AD) 2013-15- 10 that applies to certain Rolls-Royce (RR) RB211 turbofan engines. AD 2013-15-10 requires inspecting the intermediate-pressure compressor (IPC) rotor shaft rear balance land for cracks. This AD eliminates a terminating action, expands one inspection and eliminates others. This proposed AD would require inspecting the IPC rotor shaft rear balance land for cracks and eliminate certain other inspections. We are proposing this AD to detect cracking on the IPC rotor shaft rear balance land, which could lead to uncontained engine failure and damage to the airplane.