What was found
WHILE PASSING THROUGH FL 320 FOR FL 360 THE CREW HEARD A LOUD HISSING NOISE COMING FROM THE CABIN ENTRY DOOR. NO CHANGE IN PRESSURIZATION WAS NOTED. OXYGEN MASKS WERE DONNED AS A PRECAUTION, AND THE AIRCRAFT WAS DIVERTED TO KTEB WHILE DESCENDING TO A LOWER ALTITUDE. AN UNEVENTFUL LANDING WAS MADE IN KTEB. MAINTENANCE DISCOVERED THAT THE DOOR SEAL HAD PULLED 8 INCHES AWAY FROM THE FRAME. THE DOOR SEAL WAS RESEALED AND INFLATED ON THE GROUND. NO DEFECTS WERE NOTED DURING OPERATIONAL CHECKS AND THE AIRCRAFT WAS RETURNED TO SERVICE.