As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPORTED BELLY DOOR 170A P/N F50B281043 DEPARTED AIRCRAFT DURING CLIMB AND DAMAGED RT MLG DOOR. SUBMITTER BELIEVES THE LAV SERVICE DOOR MOUNTED IN DOOR 170A IS LIFTING INTO AIR STREAM AND CAUSING DOOR 170A TO DEPART ACFT. SUBMITTER STATES MFG'R BELIEVES LAV SERVICE DOOR LIFTS INTO AIR STREAM DUE TO WEAR OR OTHER REASONS.