What was found
DURING GEAR EXTENSION, WHEN HANDLE WAS PUT DOWN, THE GEAR DID NOT EXTEND THE GEAR HANDLE WAS FLASHING AND THE GEAR DOORS (MAIN) LIGHTS WERE ILLUMINATED. NOTHING MECHANICAL MOVED. GEAR HANDLE WAS PLACED IN UP POSITION AND RE-CYCLED, GEAR DEPLOYED NORMAL. REMOVED PC BOARD 10GW AND INSTALLED AN INSPECTED PC BOARD. REMOVED FROM AIRCRAFT N281QS IAW F-2000 M/M CH 20-000 PARA 19. ACCOMPLISHED A SATISFACTORY OPERATIONAL TEST OF LANDING GEAR IAW F-2000 M/M M/P 32-315.