What was found
LOS - FLT 931 - DURING CLIMB PASSING FL 210, WHEN A/P NR 1 INITIATED HDG CHANGE, AIRCRAFT WENT INTO A RAPID RATE OF ROLL. A/P NR 1 DISCONNECTED AUTOMATICALLY. CAPTAINS ADI DISPLAYED ATT FLAG AND SPEED FLAG. WHILE INTERCEPTING LOA HNL, ADI FAILED. REPLACED NR 1 VERTICAL GRYO. PERFORMED ADJ/TEST PER MM 34-23-00-OK. ALSO, PERFORMED BITE CHECKED NR 1 A/P MM 22-00-02. CHECKED GOOD. (M)