As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DOOR LEFT AFT EMERGENCY EXIT OPEN INDICATION DISPLAYED WHILE CLIMBING THROUGH FL 230. FLIGHT CRW REPORTED NORMAL CABIN RATE OF CLIMB AND CABIN PRESSURE. OPEN INDICATION CLEARED WHILE CLIMBING THROUGH FL 275. MAINTENANCE ADJUSTED THE 3L DOOR PROXIMITY SENSOR PER AMM 52-71-00 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.