What was found
STL - FLT 543 - AFTER TAKEOFF WHEN LANDING GEAR WAS RETRACTED, DOOR OPEN LIGHT REMAINED ILLUMINATED. CYCLED LANDING GEAR. FOUND DOOR SWITCH, MFG PN H14-6, OUT OF ADJUSTMENT. REPLACED DOOR SWITCH. LANDING GEAR DOOR INDICATION THEN CHECKED NORMAL. CHECK C - 9-5-96 - STL. (X)