What was found
IN FLIGHT, AT FL220, THERE WAS A MASTER WARNING, FUSELAGE DOOR INDICATION. THE FORWARD EMERGENCY EXIT DOOR INDICATED OPEN. THE F/A CHECKED THAT THE DOOR WAS SECURE BUT HANDLE DID NOT LOCK, TO BE COMPLETELY CLOSED. AC MAINTAINED PRESSURIZATION. MASTER WARNING INDICATION WENT OUT ON FINAL. C/A: CLEANED EMERGENCY EXIT PROX SWITCH AND CHECKED CLEARANCE ON PSEU, FOUND TO BE IN SERVICEABLE CONDITION IAW O400 MM 52-71-01-710-801. (K)