As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THAT THE "ACC DOOR UNLOCK", TAIL ANNUNCIATOR LIGHT ILLUMINATED. MX TROUBLESHOOTING IDENTIFIED THE AFT BAGGAGE DOOR AFT SWITCH WAS DEFECTIVE PN A4-1130. INSTALLED A NEW SWITCH. REF: WDM 33-20-01. FUNCTIONAL CHECKS SATISFACTORY.