As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3720 THE CREW REPORTED THE EXIT LIGHT BELOW THE WING EXIT DOOR ON THE LEFT SIDE WAS INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. RE-SECURED THE NR 3 EPSU CONNECTOR IAW CRJ-700 AMM 33-51-17. THE OPERATIONAL CHECK WAS GOOD.