As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DOOR OPEN LIGHT AND LEFT GEAR UNSAFE LIGHT ILLUMINATED AFTER TAKEOFF. FOUND LEFT MAIN DOOR LATCH SWITCH ACTUATOR BINDING. REMOVED AND REPLACED SPACER, REINSTALLED SWITCH. PERFORMED GEAR SWING. OPS CHECKED GOOD IAW DC-9 MM 32-10-00.