As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM TPA, RED GEAR UNSAFE LIGHT REMAINED ON. NO LIGHT WAS ON IN ANY GEAR/DOOR POSITION. RECYCLED GEAR AND PERFORMED ABNORMALS IAW DC-8 OPS MANUAL. NO HELP. REPLACED MAIN LANDING GEAR DOOR PROXIMITY BOX AND CLEANED UPLATCH ASSEMBLIES ON BOTH GEAR DOORS. PERFORMED RETRACTION CHECK IAW MAB DC8-32-6. OPS CHECKED GOOD ON THE GROUND.