AD Amdt-39-10035
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | PW4164 and PW4168 Series | Airworthiness Directives; Pratt & Whitney PW4164 and PW4168 Series Turbofan Engines |
Unsafe Condition
Fan blade failure and separation at the root section due to surface damage, cracks, improper lubrication, or bird strike damage could lead to high N1 rotor imbalance and liberation of the fan containment system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct initial and repetitive visual inspections of fan blades for surface damage and cracks, perform initial and repetitive lubrication of fan blade part span shrouds, conduct one-time ultrasonic and front corner radii inspections of fan blade root attachments, remove damaged fan blades and adjacent blades from bird strikes, and install an improved fan blade assembly as a terminating action.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Pratt & Whitney PW4164 and PW4168 series turbofan engines as specified in the AD
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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