What was found
R GEN DRIVE EICAS IN-FLIGHT. ACCOMPANIED BY ILLUMINATED R GEN DRIVE SWITCH LIGHT. COMPLIED WITH QRH. EMERGENCY DECLARED. PERFORMED RT ENG RUN TEST BER AMM 71-00-00-5-3, FOUND RT GEN CONT OFF LIGHT ON. BITE OF BPCU FOUND FAULT RT ENG GEN MPU/WIRING. WIRING CHECKED IAW FIM TASK 24-20-00-810-804 & WDM 24-11-21, FOUND D10966 PIN 1-2 OPENED INTERMITTENT. R & R RT IDG IAW AMM 24-11-01-4-4. SERVICED RT IDG IAW AMM 12-13-03-3. PERFORMED RT ENG RUN TEST IAW AMM 71-00-00-5-3, ALL TESTED NORMAL. PERFORMED RT ENG IDG OPS TEST, NORMAL IAW AMM 24-11-00-5. IDG DISCONNECT FUNCTION TEST NORMAL IAW AMM 24-11-01-6. BITE BPCU AND NO FAULT FOUND. LEAK CHECKED IAW AMM 71-71-00-6 AND NO LEAK FOUND.ACFT OK FOR SVC.