As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT ARRIVED WITH CAPTAIN REPORT AFTER TAKEOFF THE THREE LANDING GEAR RED LIGHTS AND AUDIBLE ALARM TURNED ON. ABNORMAL PROCEDURE WAS PERFORMED AND LIGHTS AND ALARM TURNED OFF. AIRCRAFT WAS SENT TO THE HANGAR, SWITCHES S-319 AND S1-89 WERE REPLACED IAW MM 32-61-00 AND TESTED IAW MM 32-30-00, ALL CORRECT.