What was found
AT CRUISE AUTOPILOT KICKED OFF DUE TO CAS MESSAGE: AP 1-2 FAIL-ELEV SRVO ALONG WITH STICK PUSHER FAIL. FLIGHT CREW OBSERVED ELEVATORS ARE VERY STIFF TO MOVE. CREW DECLARED AN EMERGENCY ONE HOUR OUT OF KPHX, AND LANDED UNEVENTFUL INTO KPHX. GULFSTREAM FAST TECHNICIANS (UNDER THEIR WORK ORDER: FA34577) TROUBLESHOT AIRCRAFT DISCREPANCIES AND FOUND ELEVATOR AUTOPILOT SERVO HARD FAILED. ALSO, FOUND FORWARD R/H UPR ELEVATOR CABLE P/N: 30P530011501-501 (IPC-170A) ROUTED INCORRECTLY OVER SPACER P/N: NAS42DD6-202N (IPC-320). ELEVATOR CABLE HAS CUT THROUGH SPACER AND WAS NOW GRINDING AGAINST THE SPACERS ATTACHING BOLT P/N: NAS1580A3T54 (IPC-325). REFERENCE GULFSTREAM G280 IPC 27-00-00 FIGURE 1, ITEM 170A, 320, 325. ELEVATOR ROUTING OVER SPACER LIKELY CAUSED ADDITIONAL FRICTION ON ELEVATOR AUTOPILOT SERVO MOTOR CAUSING IT'S FAILURE.