As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE L4 DOOR FAILED TO OPEN WITH DOOR ARMED, EMERGENCY MODE. REMOVED LININGS, RIGGED AIR RELEASE CABLE AND ARMING ROD IAW DC10 MM 52-12-00. OPS CHECK GOOD. SERVICED DOOR OPENING RESERVOIR IAW DC10 MM 52-12-00. REPLACED L4 DOOR AND SURROUND LININGS IAW DC10 MM 25-61-01.