As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BITE TEST INOPERATIVE, CHECK APU OR ECU INTERFACE MESSAGE DISPLAYED ON CDU. ACFT GROUNDED. CYCLED ACFT POWER, APU BITE BACK TO NORMAL. ACCOMPLISHED APU CURRENT STATUS CHECK & NO FAULTS IN HISTORY. CHECKED NORMAL IAW 49-61-00. NO HISTORY 30 DAYS & SEAM C.