AD 96-17-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT9D-7R4D | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4D1 | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E1 | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4E4 | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4G2 | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT9D-7R4H1 | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines |
Unsafe Condition
Low pressure turbine (LPT) vane retention hardware failures caused by the use of uncured anti-gallant compound and EDM slot configurations in 5th stage vanes, leading to uncontained engine failures, fire, and possible aircraft damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace 3rd, 4th, and 5th stage LPT vane retention bolts and nuts. Remove 5th stage vanes with EDM slots and replace with cast slot configurations. Prohibit use of uncured anti-gallant compound on vane retention hardware. Actions must be done per specified Pratt & Whitney service bulletins.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next shop visit, but not later than 5,000 cycles in service (CIS) after the effective date of this AD (November 18, 1996). For engines never disassembled, actions required at first LPT module disassembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D-7R4 series turbofan engines (models JT9D-7R4D, JT9D-7R4D-001, JT9D-7R4D-002, etc.), installed on Airbus A300, A310, Boeing 747, and 767 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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