As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7755, A & B RED DISAGREE ON LEFT MAIN GEAR. INSPECTED LEFT MLG ACTUATING CYLINDERS FOR RIG AND FOUND NO GAP ON HOOK, ROLLER AND UPLOCK. RIGGED MAIN LANDING GEAR ACTUATOR CYLINDER. CYCLED LANDING GEAR AND PERFORMED EMERGENCY EXTENSION WITH THREE CYCLES AFTERWARD. SYSTEM CHECKS GOOD.