AD 94-25-07
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
Rupture of the combustion chamber outer case (CCOC) due to cracks initiated from incomplete welds during manufacturing, which could result in fire, engine cowl release, or aircraft damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Ultrasonically inspect CCOCs for cracks within specified compliance times using PW ASB No. 5842, Revision 3. Replace or reinspect CCOCs based on ultrasonic signal amplitude thresholds. Mark eligible CCOCs with new part numbers after meeting signal criteria for two consecutive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 days or 75 cycles in service (CIS) after the effective date of this AD, whichever occurs later.
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Affected Aircraft
Pratt & Whitney Models JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, and -17AR turbofan engines with CCOC P/N 796761 or 806675, installed on Boeing 727, 737, and McDonnell Douglas DC-9 series aircraft.
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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