What was found
UPON GEAR EXTENSION RIGHT MAIN AND NOSE GEAR INDICATED DOWN AND LOCKED, LEFT MAIN GEAR NO INDICATION, ALSO NO (RED) GEAR UNSAFE. EXECUTED EMERGENCY GEAR EXTENSION CHECKLIST, AIRCRAFT LANDED SAFELY. REMOVED AND REPLACED THE LT MAIN GEAR DOWN & LOCKED LIGHT BULB WITH A NEW UNIT. RESET LOCK AT HANDLES & CONTROL LEVER ON PNEUMATIC BOTTLE, RE-SERVICED PNEUMATIC BOTTLE. ACCOMPLISHED GEAR SWINGS, ALL WORK IAW THE CESSNA 560 MM CHAPTERS 33-00-00, 32-01-00 & 12-13-01.