What was found
LOST GEN 3 ON TAKEOFF, LOSS OF ALL INSTRUMENTS, FAILED ON CAPTAIN'S SIDE.(<P >BCU #1 AND GCU #3 REPLACED IAW AMM 24-23-01 AND IPC 24-23-01-20B ITEM 50 AND 55 EPGS GND TEST PASS. HOWEVER, GEN 3 OFF WHILE BUS XFER TO / FROM APU GEN 2 WITH CMC MSG 24490 GEN CONT BREAKER 3 FAIL, FIM 24-22 TASK 884 FOLLOWED. WIRING CHECK BETWEEN #3 GCB DC953 PIN 40 AND BCU DG11BA PIN C12, DC953 PIN 48 AND GCU -3, DG8BA PIN K3 AND DC953 PIN 16, AND BCU-1 DG10BA PIN C10. ALL RESULT SATIS IAW WDM 24-22-13. AS PER FIM 24-22 TASK 8844 AND WDM 24-22-13, #3 GCU PROTECTION RELAY R8122 REPLACED. GEN 3 ONLINE CHECKED SATIS. BUS XFER BETWEEN APU GEN RESULT GOOD. #3 BUS ISLN OPS CHECK NORMAL IAW AMM 24-22-00</P>)