As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KMIA - GEAR 'DOOR NOT LATCHED LIGHT' CAME ON IN FLIGHT. CAME ON DURING UPLATCH CHECK. CYCLED GEAR, LIGHT ON AGAIN. UPLATCH CHECKED AGAIN NO GOOD. REMOVED AND REPLACED RIGHT MAIN GEAR LANDING GEAR DOOR PROXIMITY SWITCH. PROXIMITY SWITCH TEST GOOD. FOUND RIGHT UPLATCH VERY STIFF LUBED UPLATCH AND PERFORMED GEAR RETRACTION. OPS CHECKED NORMAL IAW 32-30-0. (M)