Erroneous inputs feed into the autopilot system of a U.S. Air Force QRF-4C lead to the drone’s crash at Tyndall Air Force Base on Jul. 13.
Crash investigators determined that the jet’s Attitude Heading Reference System was defective.
[thumb]http://www.airforcetimes.com/article/20140212/NEWS/302120018/Autopilot-problems-caused-July-QRF-4-drone-crash[/thumb]