What was found
ON GEAR RETRACTION, ALL 3 GREEN DOWN & LOCK LIGHTS EXTINGUISHED. RED GEAR UNSAFE LIGHT IN GEAR HANDLE REMAINED ILLUMINATED. GEAR SELECTED DOWN & ALL LIGHTS SHOWED PROPER INDICATIONS. JACKED ACFT AND APPLIED HYD POWER, CYCLED LANDING GEAR AND WAS ABLE TO DUPLICATE DISCREPANCY, VISUALLY SEEING MLG DOORS NOT CLOSING. TROUBLESHOT AND FOUND RT MLG UPLOCK ASSY REQUIRED ADJUSTMENT. ADJUSTED RT MLG UPLOCK ASSY. ACCOMPLISHED SEVERAL LANDING GEAR CYCLES, OPS CHECK WAS FOUND TO BE SATISFACTORY. ACCOMPLISHED IAW WDM 32-61-01-02 AND MM 32-30-00.