As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3743 THE LEFT EMERGENCY DOOR CAUTION MESSAGE CAME ON DURING THE TAKEOFF RUN. THE TAKEOFF WAS ABORTED. A MEL WAS ISSUED FOR THE LIGHT. ADJUSTED LEFT EMERGENCY DOOR PROXIMITY SWITCH IAW CRJ 700AMM 52-70-10. THE OPERATIONAL TEST WAS GOOD. NO PARTS WERE REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.