As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/B NOSE GEAR LIGHTS DISAGREE, COULD NOT PUT LANDING GEAR DOWN. HAD TO EXTEND LANDING GEAR USING MANUAL OVERRIDE. FOUND NOSE GEAR A SYSTEM DOWN SENSOR HARNESS FAILS. INSPECTED NLG A & B SYSTEM HARNESS. CHECKED PROXIMITY SENSOR CLEARANCES. FOUND NO DEFECTS. CYCLED GEAR SEVERAL TIMES. COULD NOT DUPLICATE PROBLEM ON THE GROUND. OPS CHECK GOOD.