AD 2005-26-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT9D-7R4 | Airworthiness Directives; Pratt & Whitney JT9D-7R4 Turbofan Engines |
Unsafe Condition
A repair station created their own repair and performed it on 520 1st stage fan blades without approval from Pratt & Whitney. This could result in 1st stage fan blade fracture and uncontained engine failure, leading to possible damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the blade root thickness of 1st stage fan blades identified by part number and serial number in Table 1 of the AD. Remove fan blades without a circled, letter I marking on the outboard side of the blade platform. Send fan blades to a source-substantiation-approved repair station for inspection. Return to service fan blades that pass inspection after proper marking.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before installing the listed 1st stage fan blades or at the next fan blade exposure if already installed.
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Affected Aircraft
Pratt & Whitney JT9D-7R4 turbofan engines installed on, but not limited to, Airbus A300, A310, Boeing 747, and 767 airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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