What was found
(CAN) LANDING GEAR FAILED TO EXTEND WHEN GEAR SELECTED DOWN.USED EMERGENCY GEAR RELEASE SYSTEM TO UNLOCK LANDING GEAR. AIRCRAFT YAWED NORMAL TO LOCK GEAR DOWN WITH GREEN LIGHTS (3) FOR MAIN GEAR. AIRCRAFT PLACED ON JACKS AND INSPECTED FOR CAUSE OF PROBLEM, FOUND THAT THE SELECTOR HANDLE DOWN MICRO SWITCH OUT OF ADJUSTMENT (INTERMITTENT). ADJUSTED MICRO SWITCH, CYCLE GEAR, OPERATIONS CHECK SATISFACTORY IAW CESSNA C500 MM CH 32-40-00.