What was found
3819 - THOUGHT AT FLIGHT LEVEL 330 MAIN CABIN DOOR SEAL FAILED, INITIALLY HELD PRESSURE THEN CABIN STARTED TO CLIMB, DESCENDED TO FLIGHT LEVEL 200 THEN COULDN'T HOLD PRESSURE. FOUND ANTENNA ABOVE FLIGHT DECK SEPARATED FROM FUSELAGE. TCAS DIRECTIONAL ***AIRCRAFT REMOVED FROM SERVICE*** REF AWA WO 302784 MX WC 1 AND 2 FOR CORRECTIVE ACTION TROUBLESHOT AND FOUND TCAS ANTENNA SEPARATED FROM FUSLAGE, REMOVED AND SECURED TCAS ANTENNA PER AMM 34-43-04. APLLIED SPEED TAPE OVER THE ANTENNA ACCESS DEWITT ROBERT JR 3722307