What was found
ETOPS SIGNIFICANT SYSTEM - IN THE CLIMB WITH AP-2 ENGAGED, AFTER PASSING FL-280 THE A/C STARTED AN UNCOMMANDED INCREASED CLIMB RATE OF 9500 FPM. CLICKED OFF AUTO PILOT AIRSPEED, WAS APPROACHING A STALL. LEVELED OFF, REGAINED AIRSPEED. RE-ENGAGED AP-2, A/C STARTED TO CLIMB EXCESSIVELY AGAIN. CLICKED OFF AP-2 AGAIN. MANUALLY CLIMBED TO OUR CRUISE ALTITUDE OF FL-380. RE-ENGAGED AP-2. OPS NORMAL. // RESET FMGEC 2. PERFORMED AFS BITE TEST PER AMM 22-96-00. TEST PASSED. NO FAULTS NOTED. OK FOR SVC.