As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB-OUT, GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION AND THE RIGHT MAIN LANDING GEAR DOOR NOT LATCHED LIGHT WAS ILLUMINATED. RECYCLED GEAR WITH THE SAME RESULTS. REPLACED RIGHT MAIN LANDING GEAR DOOR CONTROL VALVE AND UPLATCH ASSY. INSPECTED ALL PULLEYS, BRACKETS AND CABLES IN BOTH WHEEL WELLS. NO DEFECTS NOTED. PERFORMED OPS CHECK IAW DC8 MM 32-60-0.