As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NACLIMBING THROUGH 14000 THE DOOR WARNING LIGHT AND HORN CAME ON. PRESSURE WAS GOOD AND DOOR SHOWED CLOSED. DESCENDING THROUGH 17200 WARNING WENT OUT. AP SHOWED 5.4 THENCREW REPORTED DOOR IN QUESTION IS L1 DOOR. NO FAULT HISTORY FOUND. PERFORMED DOOR WARNING TEST PER AMM 52-70-00 AND L1 DOOR INSPECTION PER AMM 52-10-11 NO DEFECTS NOTED