AD 62-17-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT3C-12 | PRATT & WHITNEY Model JT3C-12 Engines |
Unsafe Condition
Fatigue cracking in the rear face of the P/N 359708 eighth stage compressor rotor disc.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect discs using an American Cystoscope Markers, Inc. Model B-175-AS-15 or FAA approved equivalent viewing instrument inserted through an inspection hole in the compressor case and eighth stage stator shroud. Reinspect every 90 hours' time in service after the last inspection. Remove and replace cracked discs. Remove all discs after 4,800 hours' time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Pratt & Whitney Model JT3C-12 Turbojet Engines.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.