As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LANDING GEAR FAILURE, AFTER TAKE-OFF GEAR UP SELECTED. NOSE DOOR ADVISORY LIGHT CAME ON FOR ABOUT 30 SEC AND OFF. ON AGAIN FOR 1 MIN AND SO ON. RETURNED BACK TO BASE. LIGHT OFF BEFORE LANDING. INVESTIGATION/ACTION NOSE LANDING GEAR DOOR CLOSED PROXIMITY SENSOR REPLACED IAW AMM 32-61-06.