As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION FROM ILN, GEAR NOT LATCHED LIGHT REMAINED ON. DISCRIMINATOR PANEL (F/E STATION) INDICATED RIGHT MAIN DOOR NOT LATCHED. CYCLED LANDING GEAR WITH NO DIFFERENCE. PROCEEDED TO DESTINATION AT FL 330 AND M.65. COMPLIED WITH MAB DC-8-32-6. MAIN GEAR DOOR CLOSED, PROX. SWITCH ADJUSTMENT AND TEST. OPS CHECKED GOOD.