As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU HAS HISTORY OF INTERMITTENTLY LOGGING FAULT 49-72104. DMM SHOWS CIRCUIT FAILURE. GROUNDED - YES. ACCOMPLISHED APU BITE REF FIM 49-60 TASK 801. CURRENT STATUS SHOWS MESSAGE: 49-72104. PER TSR, REF FIM 49-70 TASK 807. NO DEFECTS NOTED. REF AMM 49-72-11. REMOVED AND REPLACED APU DMM.