AD 97-25-10 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-59A | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-70A | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7Q | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7Q3 | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4D | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4D1 | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E1 | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
Unsafe Condition
Turbine disk failure due to cooling air hole or tie bolt hole cracking, which could result in an uncontained engine failure and damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect cooling air holes of first stage HPT disks and tie bolt holes of second stage HPT disks using fluorescent penetrant inspection (FPI) per PW SB No. JT9D-7R4-72-536, Revision 2. Replace cracked disks with serviceable parts. Report findings of cracked disks to the FAA within 10 working days.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
Pratt & Whitney JT9D-59A, -70A, -7Q, -7Q3, -7R4D, -7R4D1, -7R4E, and -7R4E1 (AI-500) series turbofan engines installed on Airbus A300, A310, Boeing 747, 767, and McDonnell Douglas DC-10 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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