What was found
ETOPS - APU AUTO SHUTDOWN. PERFORMED TSM 49-00-81-810-825-A. CONFIRMED FAULT "IGNITION UNIT SHOWS OPEN CIRUIT." REMOVED AND REPLACED IGNITION UNIT, ELECTRICAL LEAD, AND IGNITER PLUG PER AMM'S 49-41-38, 49-41-41, AND 49-41-43. OPS CHECK GOOD, MESSAGE CLEARED. OK FOR SERVICE.