Pilatus PC-12

A mostly aluminium airframe with composite parts where they save weight: control surfaces, fairings, the tail or the rotor blades. Aluminium airframe; composite control surfaces and fairings. The design is held under 1 type certificate (A78EU, held by Pilatus Aircraft LTD.). The FAA has issued 88 airworthiness directives (orders that owners must comply with) that name this model, most of them about flight controls. Operators and repair shops have filed 1,658 failure reports with the FAA since 1995, 364 of them in the last ten years: about 2.5 a year for every 100 aircraft on the register; the system most often named is landing gear. 205 approved modifications exist for it, the most by Pilatus Business Aircraft.

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.