As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, WHILE THE CREW PERFORMING CLIMB CHECK LIST, THE UP LATCH CHECK FAILED WITH RED DOOR LIGHT ON. THEY CYCLED THE GEARS WITH NO HELP. THEY RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT. MX DEFERRED THE UPLATCH SYS IAW MEL 32-14-01 TO BE ACCOMPLISHED IN DESTINATION. MX ADJUSTED THE LT UPLATCH MECHANISM. OPS CHECK GOOD IAW MM 32-31-4, 32-30-0.