What was found
AFTER TAKEOFF LOST L GEN. CREW FOLLOWED FM AND DISCONNECTED IDG .BPCU READ OUT DISPLAYED L IDG HIGH DELTA TEMP. NR 1 ENG C DUCTS OPENED TO INSPECT IDG FOUND NO LEAKS OR EXTERNAL DEFECTS, FOUND DURING IDG SERVICING 1,5 QT OF OIL ON OVERFLOW CAME OUT. NO OTHER MAINTENANCE MSG DILPLAYED IN FLIGHT DECK CORRECTION FOR IDG OVERFLOW QTY SHOULD HAVE BEEN 0.5 QT INSTEAD OF 1.5QT BPCU BITE FIM 24-20 801 CARRIED OUT IDG HIGH DELTA TEMP RECORDED. FIM 24-20 TASK 804 LT & RT POWER CHANNELS CARRIED OUT FOR IDG HIGH DELTA TEMP, STEP A. DPI CHECK CARRIED OUT, DPI NOT POPPED, GCU REMOVED IAW AMM 24-22-02/401 WIRING CHECKS CARRIED OUT BETWEEN D248A-A9 TO PIN D248A-B9, RESISTANCE FOUND TO BE IN RANGE AT 95 OHMS. IDG SERVICING CARRIED OUT IAW AMM 12-13-03/301, NOTE 0.5 LITRES OF OIL PREVIOUSLY REMOVED AFTER LANDING. CARRY ON WITH FIM 24-20 TASK 804, IDG HIGH DELTA TEMP STEP A. 4) CARRIED OUT AS PRECAUTION, RESISTANCE STILL IN RANGE. CONTINUITY CHECK CARRIED OUT ON IDG PLUG D10964 PINS 9 AND 10 FOR IDG PRESSURE SWITCH DUE TO HISTORY. NO FAULT FOUND. CONNECTOR D10964 PINS 4,5,9 & 10 INSULATION TEST CARRIED OUT, NO FAULT FOUND. T/S TO CONTINUE FROM ASTEP 4. FIM 24-20 TASK 804 TASK 4.A CARRIED OUT, NOT FAULT FOUND FOR HIGH DELTA TEMP MESSAGE. FIM COMPLETE. FURTHER INVESTIGATION REQUIRED. DURING NR 1 ENG GROUND RUN FOR RECONNECT OF IDG, IDG WCOUPLING DAMAGE. ON CONSULTATION WITH PP ENGINEERING AND TOMC, DAMAGE TO BE REPAIRED UNDER RELAVENT LOG PAGES AND NR 1 IDG TO BE MEL'D.