AD 98-04-39
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT8D-1 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-11 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-15 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-15A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17AR | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17R | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-1A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-1B | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
Unsafe Condition
Cracks in the combustion chamber outer case (CCOC) caused by defective ultrasonic inspection probes used in AD 96-23-14, leading to uncontained engine failure, inflight engine shutdown, engine cowl release, and airframe damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a one-time borescope inspection of the CCOC for cracks on engines inspected with defective probes. Perform a PW functional check on ultrasonic probes overhauled, repaired, or altered since manufacture without prior functional check.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Effective February 25, 1998
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT8D series engines (models: JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, -17AR) with CCOC part numbers 490547, 542155, 616315, 728829, 728829-001, 730413, 730413-001, 730414, 730414-001, 767197, 767279, 767279-001 installed.
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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