As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER GEAR UP SELECTION, RED NOSE GEAR LIGHT ILLUMINATED AND GEAR HANDLE ILLUMINATED AND STARTED FLASHING ON AND OFF. NO OTHER CAUTION LIGHTS ILLUMINATED. (MECHANIC) INSPECTED AND CLEANED NOSE GEAR PROXIMITY SENSOR AND PERFORMED TEST PROCEDURE IAW MM 62-61-00 PG. 202 SECTION D. NO DEFECT NOTED.