What was found
RT SIDE ENTRY DOOR, IN FLIGHT, MAKING LOUD SQUEAL AND HAS A FLASHING RED LIGHT. INDICATIONS WERE NORMAL WHEN ARMED ON THE GRD. COCKPIT INDICATIONS NORMAL. DURING FLIGHT. CORRECTED ITSELF AFTER LANDING WITH NO PRESSURIZATION IN CABIN AREA. TROUBLESHOT REF TSM 52-73-00 FOUND A CHAFED WIRE FOR WARNING LIGHT RUBBING AGAINST THE SLIDE ARM\DISARM PIN BRACKET. REPLACED THE CONTACT REF ESPM 20-48-20. ALSO REPLACED THE TEST SWITCH 40WN REF MM 52-73-14-04-01 AND TSM 52-73-00. REPLACED 40WN [E0064-83-5-0] P/B TEST SWITCH. PRESSURIZED A/C REF MM 05-53-00 AND ALSO REF MM 52-73-00-05 NO NOISE, NO LIGHTS, AND NO LEAKS FOUND A/C OK FOR SERVICE.