As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOORS WILL NOT TEST, LIGHT AND HORN. DOOR WARNING CONTROL UNIT SHOWS 28 VOLTS NOT AVAILABLE. R & R AUTONOMOUS STANDBY POWER SUPPLY UNIT AND BATTERIES REF AMM 52-73-18-04-0. RED 28, VDC LIGHT STILL ILLUMINATED WHEN A TEST OF THE SYS IS PERFORMED. R & R ALL 3 MAIN ACFT BATTERIES REF AMM 24-31-11-04-0. DOOR WARNING SYS OPS CHECKS NORMAL. ACFT OK FOR SERVICE.