What was found
ELEC IDG 1 OIL SYS FAULT & APU FAULT. ELEC IDG 1 OIL SYS FAULT MSG, HAD BEEN DEFERRED DURING TRANSIT PRIOR TO DISPATCH THE AIRCRAFT IAW MEL 24-22-02 CAT B. DURING FLIGHT THE APU FAILED. THIS ITEM ENTER ON DMI 577 LOGBOOK 0002254. ACCOMPLISHED MAINTENANCE ACTION IAW AMM 24-22-00-040-802-A, CHECKED OK. IAW TSM 24-20-00-810-898 DPI CHECK PERFORMED. IAW AMM 24-21-00-210-821 DPI NOT EXTENDER. IAW IDG OIL LEVEL CHECK WAS PERFORMED AMM 24-21-210-825 WAS PERFORMED AMM 24-21-210-825 FOUND LOW LEVEL. IAW AMM 24-21-00-210-817 VISUAL INSPECTION OF THE EXTERNAL OIL CIRCUIT TUBING’S & FUEL OIL HEAT EXCHANGER FOR OIL LEAK, WAS FOUND QAD OIL LEAK. IAW AMM 24-21-51-00-801 SHAFT PACKING WAS R & R. IAW AMM 24-21-51-400-801 SERVICING WAS PERFORMED AMM-12-13-24-612-808. IAW AMM 24-21-00710-809 OPERATIONAL TEST IDG DISCONNECT & RECONNECT. FUNCTIONAL DYNAMIC TEST OF THE IDG NR 1, WITH ENG IN OPERATIONAL WAS PERFORMED TESTED OK, NO FAULTS.