As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BLUE MAINT LIGHT. ACFT GROUNDED. PERFORMED APU BITE. FOUND FAULT 49-72103 AND 49-72104 IN CURRENT STATUS. PERFORMED FIM 49-70, TASK 806. NO WIRING DEFECTS FOUND. R & R APU DATA MEMORY MODULE IAW AMM 49-72-11. OPS CHECLED GOOD. NO CURRENT FAULTS AFTER DMM REPLACEMENT.