What was found
ON GEAR EXTENSION , LT MAIN HAD NO LIGHTS , COMPLETED CHECKLIST Z3 STILL NO INDICATION, GEAR BLEW DOWN. [SUP 4-19-07] JACKED AIRCRAFT, RAN LANDING GEAR UP & DOWN SEVERAL TIME NOTED LEFT MAIN GEAR DOWN & LOCKED LIGHT NOT ILUMINATING CHECK BULBS. FOUND BAD. REPLACED BULBS & CYCLED LANDING GEAR OPS CHECK GOOD REF CE560 M/M 32-01-00