What was found
DFW - FLT 1087 - DURING APPROACH, WHEN LANDING GEAR SELECTED DOWN, APPROXIMATE 5 SECOND HESITATION OCCURRED BEFORE LANDING GEAR BEGAN TO EXTEND. LANDING GEAR EXTENDED NORMALLY AND ALL INDICATIONS WERE NORMAL. AIRCRAFT LANDED DFW WITHOUT INCIDENT. REPLACED LANDING GEAR SELECTOR VALVE. ACCOMPLISHED LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)