As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 805 - DEN-SLC - AFTER TAKEOFF, THE LEFT GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR WAS RETRACTED. THE FLIGHT CREW ELECTED TO RETURN TO DEN. AN UNEVENTFUL LANDING WAS MADE. INSPECTION FOUND THE LEFT GEAR UPLOCK SWITCH SPACER BOLT AND NUT MISSING. THE MISSING HARDWARE WAS REPLACED AND THE SYSTEM OPERATIONAL CHECK WAS PERFORMED PER THE DC-9 MM. AIRCRAFT RETURNED TO SERVICE. (M)