Eiriavion Oy PIK 20

The airframe is composite: carbon fibre or glass fibre set in resin, moulded in large pieces with few joints, which gives smooth shapes but needs different inspection and repair methods from metal. A glass-fibre glider. The design is held under 1 type certificate (G31EU, held by Eiriavion Oy). The FAA has issued 4 airworthiness directives (orders that owners must comply with) that name this model, most of them about flight controls. Operators and repair shops have filed 2 failure reports with the FAA since 2001, 1 of them in the last ten years: about 1.8 a year for every 100 aircraft on the register; the system most often named is flight controls. 1 approved modification exist for it, the most by Pik Pacific, Mike Adams.

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.