Air Tractor Inc AT-802

A welded steel-tube frame carries the loads, with aluminium (and some fibreglass) skins over it. A crop sprayer and fire bomber: welded steel-tube fuselage under aluminium skins. The design is held under 1 type certificate (A19SW, held by Air Tractor INC.). The FAA has issued 27 airworthiness directives (orders that owners must comply with) that name this model, most of them about airframe structure. Operators and repair shops have filed 271 failure reports with the FAA since 1996, 31 of them in the last ten years: about 0.5 a year for every 100 aircraft on the register; the system most often named is airframe structure. 88 approved modifications exist for it, the most by Turbine Conversions LTD.

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.