What was found
APU AUTOSHUT DOWN DURING START. REPEAT ISSUE. PLACED ON DEFFERAL DISPATCH DESK: 28 NAME: BB DATE: 28-SEP-20- NOC DESK: 320 NAME: RUPP DATE: 28-SEP-20. OK TO PLACE APU ON MEL 4910B AND COMPLY WITH ALL MAINTENANCE PROCEDURES, AS REQUIRED. PLACED ON DEFFERAL. ON THE SHUTDOWN LOG FOUND NO FLAME FAULT A IGNITION FAULT AND A FUEL UNIT FAULT. 8030KM AND 8022KM CODES WERE PRESENT. AHM UPDATE: NO FLAME WITH IGNITION UNIT 8030KM/FUEL CTL UNIT 8022KM, REF TSM 49-00-00-810-899-A TO CONFIRM/ISOLATE FAULTS. ADDING IGNITION PARTS TO M/L. REMOVED AND REPLACED EXCITER BOX, REF AMM 49-41-38-0401 AND REPLACED 2 EA IGNITER PLUGS, REF AMM 49-41-41-0401. STARTED APU WITHOUT AUTO SHUTDOWN X3. OKAY FOR SERVICE. ADD EMP: U121118 ROTABLE PARTS CHANGE WAS INDICATED-TT NR 1172160 SN OFF 4462 EXCITER, APU OFF 18-4941-9-9001 4462 ON 18-4941-9-9001 8381.