What was found
MIAMI - AFTER TAKEOFF, DOOR NOT LATCHED LIGHT ON. RECYCLED GEAR AND ACCOMPLISHED APPROPRIATE CHECK LIST, LIGHT REMAINED ON. RETURN TO MIAMI. TROUBLESHOOTING FOUND LEFT DOOR UPLATCH HOOK AND ATTACH FITTING HARDWARE FROZEN. DISASSEMBLED, CLEANED, RE-LUBED, RE-ASSEMBLED. ACCOMPLISHED MAIN GEAR DOOR MECHANISM, ADJUSTMENT, AND TEST PER DACO MM 32-31-4. OPS NORMAL. (X)