AD 2012-14-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pratt | & Whitney (P&W) Division Turbofan | Airworthiness Directives; Pratt & Whitney (P&W) Division Turbofan Engines |
Unsafe Condition
Reports of 3rd and 4th stage vane fractures in the low-pressure turbine (LPT) of certain PW4000-94'' and PW4000-100'' turbofan engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Dimensional inspections of LPT 3rd stage vanes and the rear turbine case. Inspection of LPT 4th stage vanes at the next LPT overhaul, with removal of vanes with non-conforming airfoil fillet radii and vanes with more than one strip and recoat repair. Disassembly and reassembly of the 2nd stage high-pressure turbine (HPT) rotor and 3rd stage LPT rotor at the next HPT and LPT overhauls.
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Compliance Time
Within the specified compliance times for each action.
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Affected Aircraft
Pratt & Whitney PW4000-94'' and PW4000-100'' turbofan engines.
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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