As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU WILL NOT START. ACFT GROUNDED. PERFORMED APU BITE PROCEDURE IAW AMM 49-61-00-700-801, NO CURRENT FAULTS. PERFORMED APU STARTING AND OPERATION IAW AMM 49-11-00-860-801. USED BATTERY ONLY FOR FOUR STARTS AND WITH GROUND POWER CONNECTED TWICE. ALL STARTS SUCCESSFUL. SHUTDOWN APU IAW AMM 49-11-00-860-802. NO HISTORY LAST 30 DAYS.