AD 91-07-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CT58-140-1 | GENERAL ELECTRIC COMPANY Model CT58-140-1 Engines |
Unsafe Condition
Failure of suspect gas generator (GG) turbine rotor parts and power turbine (PT) wheels due to reduced low cycle fatigue life caused by inadvertent shotpeening, which could result in an uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and inspect all surfaces of specified GG turbine rotor parts and PT wheels by 20x microscope. Replace parts with evidence of shotpeening and reidentify cleared parts before return to service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to accumulating specified cycles since new (CSN) as listed in the AD for each part serial number.
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Affected Aircraft
General Electric Company CT58-140-1 engines overhauled by H&S Aviation, Division 3 between March 14, 1989, and August 21, 1989, with specific part numbers and serial numbers listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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