What was found
APU WILL NOT START HANGS AT 17% THEN AUTO SHUTS DOWN. AHM ASD RPT 14 INDICATES NO FLAME. HOWEVER DATA ALSO INDICATES POSSIBLE COLD SOAK, EGT NEVER GOT ABOVE -8C, OIL SUMP TEMP -18C & LCIT -16C. DRILL DOWN MCDU TO APU FAULTS CONDITION PG & NOTE LRU ID & TROUBLE SHOT IAW FCN INDICATED. DE-OIL VLV PCN 225-0092, LCIT SNSR 225-0076. REPLACED DE-OILING SOLENOID & INLET PRESS TEMP SENSOR IAW 49-91-49-400-002 & 49-23-17-400-001, OPERATIONS CHECKED APU, OKAY.