As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LHR MAINTENANCE REQUESTED A FUNCTION CHECK OF THE DOOR DURING FLIGHT, THE DOOR OPENED EASILY BUT THEN WOULD NOT LATCH IN THE CLOSED POSITION. TAPE WAS APPLIED TO HOLD IT CLOSED. **SUPPLEMENTAL REPORT REQUIRED** (OPEN)