Qualification Testing of AH64 Fly By Wire Back Up Control System (BUCS)

The AH64 Helicopter's Fly By Wire Back Up Control System was qualified. using a combination of tests performed on the aircraft and in a closed loop validation facility . The Back Up Fly By Wires System concept is described and the test procedures used to qualify that system are reviewed. Some key technical issues relating to the control logic used to monitor system health and to detect the conditions requiring automatic Back Up Control engagement are discussed.