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 GEAR RETRACTED. THE CREW CYCLED AND ACCOMPLISHED UPLATCH CHECK AND DOOR NOT LATCH LIGHT REMAINED ON. THEY RETURNED WITHOUT FURTHER INCIDENT. MX INSPECTED AND FOUND LT MAIN LANDING GEAR FOLLOW UP MECHANISM OUT OF ADJUSTMENT. THEY ADJUSTED THE FOLLOW UP MECHANISM. OPS CHECK GOOD IAW MM 32-31-5. ACFT WAS RETURNED TO SERVICE.