What was found
ETOPS-APU FIRE LOOP A FAULT// TSM 45-13-51-810-976-A,,ACTIONED. FAULT 261334 FDU APU (13WG).REMOVD AND REPLACED APU FDU PER A330 AMM 26-13-34, FAULT CLEARED AND TEST PASSED. AC OK FOR SVC. P/N OFF 3711-00, S/N OFF ZL1594; P/N ON 3710-00-00, S/N ON HW1530, FTN ON 2C8739 UNIT, FIRE DETE OFF 33-2612-9-0001 01594 ON 33-2612-9-0004 01530