What was found
ETOPS - VERIFICATION FOR APU COMPLETED UNSATISFACTORILY. ATTEMPTED APU START AT TOP OF DESCENT (FL390). APU FAULT W/ APU AUTO SHUTDOWN. INOP SYS-APU. // CONFIRMED UNSUCCESFUL COLD SOAK ATTEMPT, R/R INLET PRESSURE TRANSDUCER P/N: 3876133-1, S/N: 091121417767 PART ON... PART OFF P/N: 3876133-1, S/N: 131121418427 MX PERFORMED IAW A330 AMM 49-23-17-000-801-A AD A330 AMM 49-23-17-400-801-A.