AD 2009-21-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; PIAGGIO AERO INDUSTRIES S.p.A Model PIAGGIO P-180 Airplanes |
Unsafe Condition
Leakage in the Steering Select/Bypass Valve, installed in the Steering Manifold, when closed, is suspected to cause uncommanded steering action while the steering system is switched off. This could lead to a potentially dangerous veer along the runway during landing and takeoff.
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Required Actions
Inspect the Nose Landing Gear (NLG) steering manifold for leakage within 6 months or 100 hours time-in-service after the effective date, and repetitively thereafter at intervals not exceeding 165 hours TIS. Replace the NLG steering manifold if leakage is found, following PIAGGIO AERO INDUSTRIES S.p.A. Service Bulletin N. 80-0249, Rev. 1, dated May 27, 2009.
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Compliance Time
Within 6 months or 100 hours time-in-service after December 14, 2009, whichever occurs first.
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Affected Aircraft
PIAGGIO AERO INDUSTRIES S.p.A. Model PIAGGIO P-180 airplanes, all serial numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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