AD 82-14-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT3D-1 | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-1-MC6 | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-1-MC7 | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-1A | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-1A-MC6 | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-1A-MC7 | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-3 | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-3B | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-3C | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
| engine | Pratt & Whitney Division | JT3D-5A | PRATT & WHITNEY AIRCRAFT Model JT3D Engines |
Unsafe Condition
Cracks in third stage turbine disks (P/Ns 418903, 438903, and 675803) could result in fracture of the third stage turbine disk and an uncontained third stage turbine disk failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect third stage turbine disks (P/Ns 438903 and 675803) for cracks in tierod holes, counterweight holes, and spacer snap diameter fillet radii per Pratt & Whitney Alert Service Bulletin 5358 or equivalent. Remove P/N 418903 disks from service within 500 cycles or by December 31, 1982. Repair cracked disks within allowable limits and reinspect per service bulletin after specific cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated, unless already accomplished. Inspections must be done before specific cycle thresholds based on current cycles on the AD's effective date (July 1, 1982).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney Aircraft JT3D engines including models JT3D-1, JT3D-1-MC6, JT3D-1-MC7, JT3D-1A, JT3D-1A-MC6, JT3D-1A-MC7, JT3D-3, JT3D-3B, JT3D-3C, and others as listed.
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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