As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON EXTENDING THE LANDING GEAR FOR LANDING THE LT MAIN GEAR WOULD NOT COME DOWN WITH A CORRESPONDING GEAR DISAGREE WARNING MESSAGE. CYCLED THE GEAR UP AND THEN DOWN AGAIN & IT CAME DOWN. FLT#4848 REPOSITIONED SAFETY WIRE ON MLG SELECTOR VALVE & FULLY SEATED CONNECTOR ONTO SELECTOR VALVE. PERFORMED EXTENSION & RETRACTION OF LANDING GEAR & AN EMERGENCY EXTENSION OF LANDING GEAR. OPERATIONS CHECKED GOOD.