What was found
ORD - FLT 0475 - UPON GEAR EXTENSION, ALL THREE GEAR LIGHTS INDICATED UNSAFE. CREW VISUALLY INSPECTED GEARS, ALL WERE DOWN AND LOCKED. LANDED ORD WITHOUT INCIDENT. REPLACED PROXIMITY UNIT. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ORD - FLT 0475 - UPON GEAR EXTENSION, ALL THREE GEAR LIGHTS INDICATED UNSAFE. CREW VISUALLY INSPECTED GEARS, ALL WERE DOWN AND LOCKED. LANDED ORD WITHOUT INCIDENT. REPLACED PROXIMITY UNIT. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)