What was found
UNCOMMANDED THRUST ON NR 1 ENGINE PDIS 724 73-20 6735 04JUN20 MEM. WHILE AT CRUISE FL340 WITH MANUAL THROTTLES DUE TO ATS SYSTEM MEL'D. WHEN ADJUSTING POWER NOTICED NR 1 ENGINE WAS SLOWLY INCREASING POWER WHILE PULLING NR 1 THROTTLE BACK, EPR POINTER REDUCE BUT ALL ENGINE SETTINGS WERE INCREASING. WHILE TROUGLESHOOTING, ENGINE TEMPORARILY EXCEEDED N1 APPROX 108%, EGT 650 DEGREES, N2 112%, TIME OF EXCEEDENCES NO MORE THAN 20 SECONDS. WHEN STARTED A DESCEND AND ENGINE RESPONSE RECOVERED. OBTAINED FADEC 1 OVHT, FADEC CHANNEL A & B FAULT ON LANDING. PERFORMED BITE TEST PER TSM 73-21-40 ON THE NR 1 FADEC SYS AND GRD FAULT CODES NOTED WERE 350-18 AND 350-29. DURING LAST FLIGHT LEG FAULT CODES 352-23, 350-18, 350-16 AND 350-15 WERE NOTED. OPENED THE LEFT FAN COWL AND INSPECTED AREA AROUND THE EEC FOR A PNEUMATIC LEAK, NONE NOTED.