What was found
UPON RAISING THE LANDING GEAR, THE RED UNLOCK LIGHT STAYED ILLUMINATED AND THE HYD PRESS LIGHT STAYED ILLUMINATED. LOWERED THE GEAR, ALL THREE GREEN LIGHTS ILLUMINATED. LANDED SAFELY. CORRECTIVE ACTION: REMOVED ICE FROM MAIN UNLOCK ROLLERS. OPS CHECK GOOD. IAW CE560XL AMM 32-01-00