As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WITH GEAR HANDLE UP ALL (4) RED UNSAFE LIGHTS REMAINED ILLUMINATED. COMPLETED APPROPIATED CHECK LIST, NO CHANGE IN THE LIGHTS INDICATION. NOTIFIED ATC, FLIGHT CONTROL AND MX CONTROL. RETURNED TO DEPARTURE. IAW TAFI 32-30-00, R & R PROXIMITY ELECTRONIC UNIT IAW AMM 32-61-01. ACCOMPLISHED GEAR SWING IAW AMM 32-30-00. FOUND INDICATION NORMAL AT THIS TIME.