AD 2001-25-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus | Aircraft Ltd | Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes |
Unsafe Condition
Excessive backlash in the flap actuator internal gear system and electrical surges in the flap control system, which could lead to flap power drive-unit circuit breaker not closing during flight and current surges, potentially causing flap system failure and reduced or loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the flap actuator internal gear system for correct end-play and backlash measurements and accomplish any necessary corrective adjustments. Incorporate modifications to the flap system and install a new design FCWU with a serial number of 100,001 or higher, or FAA-approved equivalent part number. Modify the flap control wiring and install a flap power drive-unit field control panel.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 600 flight hours after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 airplanes.
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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