AD 2014-09-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Piaggio Aero Industries S.p.A Airplanes |
Unsafe Condition
Cases of un-commanded operation of switched off nose-wheel steering system caused by internal leakage of a Steering Select/Bypass Valve installed in the nose landing gear (NLG) Steering Manifold.
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Required Actions
Repetitive functional checks of the Steering Manifold must be performed to verify internal leakage proofness. The functional check must also be accomplished upon installation of a replacement Steering Manifold. Optional modification is introduced as terminating action for the repetitive functional checks.
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Compliance Time
Before further flight
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Affected Aircraft
Piaggio Aero Industries S.p.A. Model P-180 airplanes, serial numbers as specified in the AD.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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