Bellanca 14

A welded steel-tube fuselage and wooden wings, all covered in fabric: the construction of the 1930s and 1940s, which makes wood rot and fabric age the inspection items. The Cruisair and Cruisemaster: wooden wings under fabric. The design is held under 4 type certificates. The FAA has issued 23 airworthiness directives (orders that owners must comply with) that name this model, most of them about flight controls. Operators and repair shops have filed 4 failure reports with the FAA since 2001, 3 of them in the last ten years: about 0.4 a year for every 100 aircraft on the register; the system most often named is flight controls. 138 approved modifications exist for it, the most by Garmin International INC.

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.