What was found
RIGHT GEN DRIVE LIGHT REMAINS ILLUMINATED. TRIED TO RECYCLE RIGHT GEN CONT DRIVE LGHT AND GEN OFF. LIGHT REMAINS ON. GEN FIELD LIGHT DOES RESET. MEL 24-01 AUTH NR 04-155DC-6, AFTER PUSH BACK AND ENG START RT IDG FAILED AGAIN. DRIVE LT ON NO VOLTS. NO FREQ, BPCU SHOWS NO FAULT. DISC RT IDG AND DISPATCHED A/C AS PER MEL 24-01 AUTH 04-155DC-B FOR 120 MINS ETOPS ONLY, MPM PROC 24-01. FOUND IDG SHAFT SHEARED. REPLACD IDG EPR MM. OPS CHECK AND LEAK CHECK NORMAL. REMOVED MEL 4-155DC-B. REMOVED FROM MIC.