As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, ON GEAR RETRACTION THE GEAR HORN WARNING SOUNDED UNTIL THE RED LIGHTS ON THE GEAR ANNUNCIATOR PANEL WENT OUT. CLEANED LT & RT MLG SWITCHES. PERFORMED NUMEROUS GEAR SWINGS AT TAKEOFF CONFIGURATION, WITH NO DISCREPANCYS NOTED. OPS CHECKED GOOD IAW MM 29-10-00.