As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NADURING BATTERY INSTALL TEST (BITE ONLY) AMM 52-73-00 SECTION 13 RECEIVED CONTINOUS FAULT LIGHTS ON ASPSU FOR UNIT AND 28VDC AFTER ALL OTHER LIGHT WENT OFF. AFTER 1 MIN TIME OUT PERIOD UNIT WOULD NO LONGER TESTR&R ASPSU PER AMM 52-73-18 OPS CHECK NORMAL PER AMM 52-73-00-0501 IPC 52-73-01