As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: WHEN OPENING THE MED FROM THE INSIDE, A SHARP, METALLIC POP IS HEARD AFTER THE VENT DOOR HAS OPENED AND AS THE LEVER STARTS TO ENGAGE THE DOOR TO RAISE IT OUT OF ITS TRACKS. THE SOUNDS SEEMS TO COME FROM THE BASE OF THE LEVER HANDLE INSIDE THE HOUSING.