Airworthiness Directives; General Electric Company CT64-820-4 Turboprop Engines
airworthiness · Rule · Final rule; request for comments. · Published 2005-06-21 · Effective 2005-07-06 · 70 FR 35523
Document
Document number
05-12173
Federal Register citation
70 FR 35523
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
General Electric Company CT64-820-4 Turboprop
Publication date
2005-06-21
Effective date
2005-07-06
FAA docket
Docket No. FAA-2005-21586
Abstract
The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CT64-820-4 turboprop engines with stage 1 turbine disk and shaft, part number (P/N) 6004T47P03 or 4921T10P02 installed. This AD requires removing from service these stage 1 turbine disk and shafts at reduced compliance times. This AD results from the discovery by the manufacturer of low-cycle-fatigue (LCF) cracks found in stage 1 turbine disk and shafts, P/Ns 6004T47P03 and 4921T10P02. We are issuing this AD to prevent uncontained failure of the stage 1 turbine disk and shaft, resulting in damage to the airplane.