What was found
GEN SOURCE LT CAME ON IN CRUISE. UNABLE TO RECONNECT GEN 1 APU GEN CONNECTED REF FIM 24-21 TASK 802, FOUND THAT THERE WAS AN INDICATION ON GCU1 BOX IN THE E&E OF IDG FAIL. BITE TESTED THE BOX AND CLEARED THE FAULT. THE IDG FAULT FIM REF IS 24-21 TASK 805 TO CONTINUE TROUBLESHOOTING. MANUALLY RECONNECTED #1 ENG IDG REF AMM 24-11-11, UNABLE TO PERFORM ENG RUN AND OPS CHECK DUE TO AIRPORT OPERATIONS. VERIFED INSTALL AND TORQUE OF NO. 1 ENGINE IDG FEEDER CABLES PER GMM 0910-05 AND AND AMM 24-11-11. NO DEFECTS PERFORMED ENGINE RUNS OPS CHECK FAIL TS IRW FIM 24-21 TASK 805 IDK FAIL LATCHED AFTER ENGINE RUN, SWAPPED GCU OPS CHECK FAIL, INSPECTED WIRING IRW FIM 24-21 TASK 805 WITH NO DEFECTS NOTED, IDG MOMENTARILY COMES ONLINE THEN FAILS, IDG REQ REPLACEMENT. REMOVED #1 ENG IDG REF AMM 24-11-11-000-801. OLD IDG LOCATED IN CENTER OF HANGER SECURED TO JACK. #1 ENGINE IDG INSTALLED REF AMM 24-11-11, FOLLOW ON MX NOT ACCOMPLISHED AT THIS TIME, IDG INITIAL SERVICING C/W PARTS USED: 29-2411-9-0001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1523056 SN OFF 0818 ENGINE RUN AND OPERATIONAL TEST OF NUMBER ONE IDG REQUIRED GENERATOR, INTE OFF 29-2411-9-0001 0818 ON 0000 GENERATOR, INTE OFF 29-2411-9-0001 0818 ON 29-2411-9-0001 2213 PARTS NOT IN STOCK. LEAK AND OPS CHECK C/W, NO DISCREPANCY NOTED ENGINE RUN GOOD