airworthiness · Rule · Final rule; request for comments. · Published 2007-11-29 · Effective 2007-12-14 · 72 FR 67568
Document
Document number
E7-23020
Federal Register citation
72 FR 67568
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2007-11-29
Effective date
2007-12-14
FAA docket
Docket No. FAA-2006-26052
Abstract
The FAA is superseding an existing airworthiness directive (AD) for Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. That AD currently requires initial and repetitive on- wing or in-shop inspections of the high pressure/intermediate pressure (HP/IP) turbine bearing oil feed tube heat shield. This AD requires the same actions but introduces a terminating action to the repetitive inspections. This AD results from RR introducing a revised HP/IP turbine bearing support structure as terminating action to the repetitive inspections of the HP/IP turbine bearing oil feed tube heat shield. We are issuing this AD to prevent an uncontained failure of the HP turbine disc and damage to the airplane.