As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO DOOR UNLOCKED LIGHT CAME ON IN FLIGHT. VERIFIED MAIN CARGO DOOR CLOSED AND LOCKED. DEFERRED LIGHT ASSEMBLY. REPLACED LATCH PIN ROD ACTUATOR CHECK VALVE, INSPECTED ALL WARNING SWITCHES AND WIRING WITH NO DEFECTS FOUND. TESTED PER FED-EX MM 52-70-09 WITH ALL CHECKS NORMAL.