As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAIL ACCESSORY DOOR OPEN PANEL LIGHT CAME ON DURING TAKEOFF. AS WE TAXIED BACK IN IT WAS INTERMITTENT. TROUBLESHOT; FOUND AFT BAGGAGE DOOR SWITCH FAULTY. REMOVED AND REPLACED AFT PIN SWITCH FOR AFT BAGGAGE DOOR. OPS CHECKS GOOD. RESTORED SYSTEM AND AFT BAGGAGE. WORK DONE IAW WIRING MANUAL 33-10-01.