Kenmore Air of Kenmore, Washington provides Beaver and Otter airframes with zero-hour fatigue-life ratings, and owns dozens of supplemental type certificates (STCs) for aircraft modifications.
Kenmore Air fra Kenmore i Washington i USA leverer Beaver og Otter flystel med nul-timers levetid, og ejer i snesevis af supplemental type certificates (STCs, tillægscertifikater) for tilladte modifikationer.