Airworthiness Directives; General Electric CT7 Series Turboprop and Turboshaft Engines
airworthiness · Rule · Final rule. · Published 1994-01-03 · Effective 1994-02-02 · 59 FR 3
Document
Document number
93-31908
Federal Register citation
59 FR 3
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
General Electric CT7 Series Turboprop and Turboshaft
Publication date
1994-01-03
Effective date
1994-02-02
FAA docket
Federal Register: January 3, 1994
Abstract
This amendment adopts a new airworthiness directive (AD), applicable to General Electric (GE) CT7 series turboprop and turboshaft engines. This proposal would require the removal from service of certain gas generator turbine (GGT) rotor assembly parts that were plasma-sprayed during manufacture. This amendment is prompted by material testing that indicates that the plasma-spray process reduces the low cycle fatigue (LCF) capability of the material. The actions specified by this AD are intended to prevent fatigue cracks that can result in uncontained engine failure.