Summary
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.
Directive Details
AD Number
FAA-2010-0998
Document Number
2011-21312
Type
Rule
Publication Date
August 22, 2011
Effective Date
September 26, 2011
Affected Manufacturer
General Electric Company (GE) CF6-45 Series and CF6-50 Series Turbofan
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2010-0998
Topics
Official Documents
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