What was found
FAULT LIGHT ILLUMINATED DURING FIRST APU START ATTEMPT FL 380. APU STARTED ON SECOND ATTEMPT FL 380. ACFT GROUNDED. ATTEMPTED CSS OF APU AT FL360. EGT RAPIDLY ROSE FOLLOWED BY FAULT LIGHT AND AUTOSHUTDOWN. FOLLOWED QRH PROCEDURE. FAULT LIGHT EXTINGUISHED AFTER 3.5 MINUTES. ACCOMPLISHED FIM TASK 49-30-803 PARA H. PERFORMED GENERAL VISUAL INSPECTION OF THE AIR INLET DUCT AND COMPRESSOR INLET PLENUM, NO FOD OR BLOCKAGE NOTED. VERIFIED APU ROTATES FREELY IAW AMM 49-21-00. REMOVED AND REPLACED THE FLOW DIVIDER, APU OPS CHECKED NORMAL IAW AMM 49-31-15. REMOVED AND REPLACED SURGE CONTROL VALVE IAW AMM 49-52-41.