Summary
We propose to adopt a new airworthiness directive (AD) for Piaggio Aero Industries S.p.A Model P-180 airplanes that would supersede an existing AD. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as cases of un-commanded operation of switched off nose-wheel steering system caused by internal leakage of a steering select/bypass valve, which could lead to loss of directional control on ground during take-off or landing, possibly resulting in a runway excursion. We are issuing this proposed AD to require actions to address the unsafe condition on these products.