Description. . Quality Aircraft Accessories (QAA) overhauls and distributes piston engine and limited airframe accessories from its locations in Tulsa, OK and Ft. Lauderdale, FL to a worldwide customer base of over 25,000 pilots and mechanics. As a Hartzell Engine Technologies (HET) company, we provide complete life cycle support for the full line of HET products including turbocharging systems, aircraft alternators, starters, fuel pumps and cabi...