AD 86-13-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Polskie Zaklady Lotnieze Spolka zo.o | PZL M18 | Airworthiness Directives; Wytwornia Model PZL M18 Series Airplanes |
Unsafe Condition
Cracks, deformation, or corrugation in the propeller pitch control system load carrying tube, propeller pitch control bracket, throttle control system torque tube, and engine mounting frame struts could lead to loss of engine control.
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Required Actions
Daily pre-flight visual checks for cracks, deformation, or corrugation on specified parts. Within 50 hours time-in-service and every 50 hours thereafter, inspect with 5X magnification. Replace damaged parts or install improved components as per specified Mandatory Service, Design, or Engineering Bulletins before next flight. Adjust inspection intervals up to 10% for maintenance coordination. Equivalent compliance requires FAA approval.
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Compliance Time
Before the first flight of each day and within 50 hours time-in-service after the effective date and every 50 hours time-in-service thereafter.
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Affected Aircraft
Wytwornia Model PZL M18 (serial numbers up to and including 1Z012-40) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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