What was found
(CAN) REPLACED BOTH FLIGHT CONTROL COMPUTERS, FCC, FOR OPS PURPOSES WITH O/H UNITS. THE ACFT DID NOT HAVE ANY PROBLEMS BEFORE THIS WAS DONE. EXPERIENCED MULTIPLE AP DISCONNECTS BOTH INTERMITTENTENTLY AND 1 HARD FAILURE. HAD TO PROCURE 3 MORE UNITS IN ORDER TO FIND 2 THAT WERE SERVICEABLE. 1 ARRIVED DOA WHICH WHEN INSTALLED CAUSED THE FD TO GO INTO GO AROUND MODE OR TAKEOFF MODE ON IT`S OWN. 4 OF THE 5 UNITS CAME IN WITH STRIP REPORTS WHERE THE INCOMING PROBLEM WAS NOT CONFIRMED.