airworthiness · Rule · Final rule; request for comments. · Published 2003-10-30 · Effective 2003-11-14 · 68 FR 61739
Document
Document number
03-27153
Federal Register citation
68 FR 61739
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Rolls-Royce plc Trent 768-60 and Trent 772-60 Turbofan
Publication date
2003-10-30
Effective date
2003-11-14
FAA docket
Docket No. 2003-NE-37-AD
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211 Trent 768-60 and Trent 772-60 turbofan engines. This AD requires reworking the low pressure (LP) turbine nozzle vane case, the LP turbine bearing support exhaust case, and the support arm bracket assemblies. This AD is prompted by a report of an LP stage 4 blade failure at the blade shank, resulting in severe radial distortion of the rear flange of the LP turbine case and failure of a number of attaching bolts, resulting in enough flange separation to allow the release of high energy debris. We are issuing this AD to prevent possible uncontained LP turbine case failure and damage to the airplane.