AD 76-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT8D-1 | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-11 | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-1A | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-1B | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-7 | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-7A | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-7B | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-9 | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
| engine | Pratt & Whitney Division | JT8D-9A | PRATT & WHITNEY AIRCRAFT Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 Engines |
Unsafe Condition
Failure of the eighth stage compressor disk, P/N 496908, due to cracking.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the eighth stage compressor disk prior to specified cycle limits or inspect per Pratt & Whitney SI-10F-77 at intervals (every 120 cycles after initial inspection by June 30 or September 30, 1977). Replace cracked disks before further flight. Do not exceed 11,000 total cycles since new.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated in the AD text (schedules A and B with deadlines June 30, September 30, and December 31, 1977).
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Affected Aircraft
Pratt & Whitney Aircraft JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, and -11 engines with eighth stage compressor disk P/N 496908.
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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