Airworthiness Directives; General Electric Company (GE) CF6-45 Series and CF6-50 Series Turbofan Engines
airworthiness · Rule · Final rule. · Published 2011-08-22 · Effective 2011-09-26 · 76 FR 52213
Document
Document number
2011-21312
Federal Register citation
76 FR 52213
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
General Electric Company (GE) CF6-45 Series and CF6-50 Series Turbofan
Publication date
2011-08-22
Effective date
2011-09-26
FAA docket
Docket No. FAA-2010-0998
Abstract
We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires performing a fluorescent penetrant inspection (FPI) of the low-pressure turbine (LPT) rotor stage 3 disk at every shop visit at which the LPT module is separated from the engine. This AD was prompted by seven reports of uncontained failures of LPT rotor stage 3 disks and eight reports of cracked LPT rotor stage 3 disks found during shop visit inspections. We are issuing this AD to prevent LPT rotor separation, which could result in an uncontained engine failure and damage to the airplane.