As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT MAIN GEAR DID NOT RETRACT ON TAKEOFF. 3 GREENS WENT OUT, RED LIGHT STAYED ON AND LT GREEN GEAR LIGHT CAME BACK ON WHEN GEAR LEVER RETRACTED. REPLACED LT MAIN LANDING GEAR UPLOCK SWITCH PN 65-430087 WITH NEW PN 65-430087, ACCOMPLISHED SATISFACTORY OPERATIONAL CHECKS, REF MM 32-01-00.