As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT, THE "DOOR NOT LATCH" LIGHT CAME ON WITH LANDING GEAR RETRACTED. THE CREW CYCLED GEAR AND ACCOMPLISHED UPLATCH CHECK, DOOR NOT LATCH LIGHT REMAINED ON THE REMAINDER OF FLIGHT. LANDED WITHOUT FURTHER INCIDENT. MX INSPECTED AND FOUND FLUID CONTAMINATION AND BURNING/ ARCING IN THE RT DOOR WARNING SWITCH. THEY REPLACED THE RT DOOR WARNING SWTCH. OPS CHECK GOOD. ACFT WAS RETURNED TO SERVICE.