What was found
PRIOR TO LEVEL OFF, A/P NR 1 DISENGAGED, UPON RE-ENGAGEMENT, CAPT FPI INDICATES NORMAL. HOWEVER, A/C DIDN'T CAPTURE ALT. DISENGAGED A/P AND FLEW BACK TO LEVEL. RE-ENGAGED A/P WOULDN'T CAPTURE ALT. RE-DISCONNECTED AND TURNED ON A/P A THIRD TIME AND A/P FUNCTIONED NORMALLY. DEFERRED PER MEL 22-11-1. ASSIGNED DMI 5813. PLACARD AUTOPILOT PANEL. REMOVED AND REPLACED NR 1 LONGITUDINAL COMPUTER. TEST OK IAW MM 22-10-00. THIS CLEARS DMI 8813. PLACARD REMOVED. MCX NOTIFIED.