AD Amdt-39-10135
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT8D Series | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
Unsafe Condition
Failure of the fourth stage hub due to a manufacturing defect could lead to release of low pressure turbine blades, shaft, or hub failure resulting in engine debris and damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Continue inspections of low pressure turbine (LPT) blade sets for shroud crossnotch wear, remove affected engines if necessary, install improved LPT containment hardware by December 31, 1998 for engines with suspect 4th stage hubs, and install improved No. 6 bearing scavenge pump bracket bushing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight for inspections and removal; improved hardware must be installed by December 31, 1998 for engines with suspect hubs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT8D series turbofan engines with fourth stage hubs identified by serial number as suspect.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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