What was found
UPON LANDING GEAR RETRACTION LEAVING MYR, MAIN GEAR DOOR LIGHT STAYED ILLUMINATED. RECYCLED GEAR AS PER ABNORMAL PROCEDURE IN FCOM, BUT LIGHT STAYED ILLUMINATED. FLEW TO MDW WITH RT HYDRAULIC SYSTEM ON HIGH, PRESS/QUANTITIES NORMAL AS PER FCOM. UPON GEAR EXTENSION OUT MDW, MAIN GEAR DOOR LIGHT EXTINGUISHED. INSPECTED GEAR IAW MM AND NO DEFECTS NOTED. GROUND CHECKS OK. (M)