As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER THE LANDING GEAR SELECTED TO UP DURING CLIMB, THE LT DOOR AMBER INDICATION REMAINED ON AS WELL AS THE LT MLG RED INDICATOR REMAINED ON. CREW RETURNED TO BASE. MAINTENANCE FOUND: LT UP-LOCK SENSOR INDUCTANCE REPORTED TO BE OUT OF LIMITS. THE LOW INDUCTANCE FOR THE UP-LOCK SENSOR HAS BEEN TRACED TO A MISSING TARGET ON THE UP-LOCK. MLG UPLOCK ASSY TO BE REPLACED. (TCNR 20060207003)