What was found
ON DEPARTURE PASSING 12K FT RIGHT MLG DOOR LIGHT CAME ON. POSITION GEAR HANDLE TO UP AND LIGHT WENT OUT POSITION GEAR HANDLE TO OFF LIGHT CAME ON AGAIN CONTINUED FLIGHT WITH GEAR HANDLE IN UP POSITION. FOUND RIGHT GEAR DOOR INDICATION CANNON PLUG HALF OFF. RESECURED SAME, PINNED ALL GEAR AND OPS CHECKED GEAR DOOR CHECKS NORMAL. REMOVED GEAR PINS, OK FOR SERVICE.