As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM PDX, DOOR LIGHT CAME ON DURING GEAR UPLATCH CHECK, GEAR AND DOOR LIGHT REMAINS ON WITH GEAR UP AND LOCKED. CREW RECYCLE GEAR AND NO CHANGE, AND RETURNED BACK TO PDX. MX INSPECTED MAIN GEAR AND FOUND RT GEAR DOOR STRIKER MISSING DOOR SWITCH. REPOSITION AND TEST PER APPLICABLE MANUALS AND RETURNED AIRCRAFT TO SERVICE.