What was found
ETOPS SIGNIFICANT SYS - EICAS MESSAGE, RT GEN OFF, RETURNED TO NORMAL AFTER GENERATED SWITCH RESET. OCCURS DURING RT ENG STARTS WHEN STARTER CUT OUT. ACCOMPLISHED FIM 24-20-00, WIRING CHECKED OK FROM RT GCU TO RT IDG PMG. BPCU BITE UNDER FREQUENCY TRIP, IDL/PML WIRING. REPLACED RT ENG IDG IAW AMM 24-11-01 OPS & LK CKS GOOD. BPCU BITE OK.