What was found
THE FLIGHT CREW DISCOVERED DURING THE PREFLIGHT CHECKS A SSU/FLAP FAULT INDICATION. MX TROUBLESHOT THE FAULT AND FOUND BOTH THE RT INBD/OTBD FLAP POSITION FLAP SWITCHES SHORTED TO GROUND AND THE F5 3AMP FUSE FOR THE NR2 SSU WAS OPEN. BOTH FLAP POSITION SWITCHES WERE REPLACED WITH NEW SWITCHES (PN 25-8NA5-155) AND RIGGED AND A NEW FUSE WAS INSTALLED. FUNCTIONAL CHECKS WERE SATISFACTORY. THE TECHS REPORTED THE DEFECTIVE SWITCHES REMOVED WERE IDENTIFIED AS BEING FROM THE SAME LOT. NOTE: THE DEFECTIVE SWITCHES WERE DESTROYED BEFORE THE LOT NUMBERS WERE RECORDED.