What was found
ETOPS SIGNIFICANT SYSTEM, ON APU START AFTER LANDING HAD ECAM APU FAULT AUTO SHUTDOWN LOG-PAGE. TROUBLESHOT PER TSM 49-62-00-810-808-A. REMOVED AND REPLACED LOWER IGNITER PLUG, PLUG APPEARED FOULED. OPS CHECK GOOD PER AMM 49-00. CONTACTED MC FOR VERIFICATION FLIGHT.