AD 83-22-52 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-7R4D | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4D1 | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E1 | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E4 | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4G2 | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
| engine | Pratt & Whitney Division | JT9D-7R4H1 | PRATT & WHITNEY AIRCRAFT Model JT9D-7R4 Series Engines |
Unsafe Condition
Fuel nozzles (P/N 792842 and P/N 794731) in JT9D-7R4 series engines that have accumulated 625 total cycles or more may experience deterioration leading to potential engine performance degradation or failure.
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Required Actions
Refurbish fuel nozzles according to specified procedures and schedules. For JT9D-7R4D and -7R4E engines, follow Pratt & Whitney All Operator Wire JT9/73-13/PSE:DAB:3-10-14-1 or Boeing 767-SL-73-1. For other models, use Pratt & Whitney All Operator Wire HT9/73-13/PSE:DAB:3-10-14-1, Boeing 747-SL-73-14, or Manual P/N 785057 TR72-1. Compliance schedules vary based on incorporated service documents.
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Compliance Time
Within the next 75 or 150 cycles (depending on incorporated service documents) for initial refurbishment, and thereafter at intervals not exceeding 700 cycles.
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Affected Aircraft
Pratt & Whitney Division JT9D-7R4 series engines with fuel nozzles P/N 792842 or P/N 794731 that have accumulated 625 total cycles or more.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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