What was found
PER FLIGHT CREW - RT MAIN BUS FAILED IN FLIGHT, RAN CHECKLIST- APU ON, FO'S BUS FAILED EVERY 10 MINUTES WITH CABIN LIGHTS FLICKERINGREPLACED R GCU PER AMM 24-22-02. S/W CK GOOD, OPS TESTS REQ'D. REPLACED ELMS CB C24332 REF SSM 24-22-21. REMOVED AND REPLACED E2 IDG. REF AMM 24-11-01. TORQUED E2 IDG FEEDER CABLES AND INSTALLED COVER. REF AMM TASK 24-11-01-400-801-001. INSPECTED FEEDER CABLE INSTALLATION IAW GMM 09-10-05. PERFORMED WIRING CHECKS FROM PIN 58 OF DP415 TO PIN 20 OF DM24405C CHECKS OK. AND PIN 23 OF C24332 TO PIN 7 OF DM24405A, TEST OK. PERFORMED MEGGER TEST FROM IDG LUGS, CHECKS OK. REF FIM 24-51 T823 & WDM 24-21-21-1. INSTALLED R GCU PER AMM 24-22-02. S/W CKD. REPLACED ELMS CB ELM827-3 POS C24#2 ENG IDG TESTS OKAY REF MM 24-11-00-700-802.