What was found
FOLLOWUP TO RECENT APU FAULTS. ETOPS SIGNIFICANT SYSTEM TASK AFFECTS APU ON DEMAND IN-FLIGHT START CAPABILITY. UPON COMPLETION, CONTACT MAINTENANCE CONTROL AND REPORT THAT THIS TASK HAS AFFECTED APU IN-FLIGHT START CAPABILITY, MEL 49- 99A IS REQUIRED PRIOR TO FLIGHT. GROUNDED - YES. REMOVED AND REPLACED APU IGNITION UNIT THROUGH B737-800 AMM 49-41-31 ITEM 3.G.C 55041 REQ 3H IGNITION UNIT INSTALLATION TET AND 3J APU ON DEMAND POST MAINTENANCE COLD SOAK START DEFERRAL COMPLETED B737-800 TASK 49-41-31, OPS CK OF APU GOOD. TSR COMPLETED.