As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MLG DOOR CRACKED JUST ABOVE ROD END ATTACH POINT. EXCESSIVE VIBRATION FROM SLIP STREAM, SUSPECT CAUSE OF THE CRACK. NOTE: SUBMITTER STATED THIS DEFECT HAS BEEN OBSERVED BEFORE. RECOMMEND REINFORCING AFFECTED AREAS OF THE DOOR OR REPLACE WITH AN ALUMINUM DOOR. PART TOTAL TIME IN SERVICE 187.2 HOURS.