What was found
RIGHT GEN OFF EICAS. UNABLE TO RESET AFTER ONE ATTEMPT. PERFORMED BPCU BITE CHECK IAW FIM 24-20 TASK 801. FAULTS FOR RT GEN AS FOLLOWS: IDG HIGH RISE TEMP, & GEN/FIELD/WIRING/GCU. REF FIM 24-20 TASK 804 FOR IDG HIGH RISE TEMP, VERIFIED DPI WAS NOT EXTENDED, REMOVED RT GCU & MEASURED RESISTENCE BETWEEN PINS D256A-A9 & D256A-B9. RESISTENCE FOUND TO BE WITHIN LIMITS. INSTALLED RT GCU & SERVICED RT IDG. REMOVED RT GCU AND PERFORMED RESISTENCE CHECKS FOR GEN/FIELD/WIRING/GCU. FOUND WITHIN LIMITS. R & R RT GCU IAW AMM 24-22-02. PREVIOUS FAULT MESSAGES CLEARED. NEW FAULT MESSAGE, REPLACE GEN DIODE. RAN NR 2 ENG AS PRECAUTION BEFORE REPLACING IDG. GEN 2 FAILED TO RESET. SWAPPED LT & RT GCUS FOR TROUBLESHOOTING, SUSPECT GCU WAS BAD FROM STOCK. PERFORMED BPCU BITE TEST IAW AMM 24-22-00. BOTH GCU ARE FAULTING. RT GCU FAULT SHOWS REPLACE GCU & LT FAULT SHOWS SHORTED PMG TRIP & GEN/FIELD WIRING/GCU. INSTALLED LT & RT GCU BACK TO ORIGINAL POSITION IAW AMM 24-22-02. R & R RT ENG IDG IAW AMM TASK 24-11-01-404-001-006 TO STEP H.3. PERFORMED BP LEAK CHECK OK. BITE CHECK OK IAW AMM TASK 24-11-00-745-001. FINAL IDG SERVICING PERFORMED IAW AMM 12-13-03.