Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Diverted
Aircraft
On departure we got a hydraulic quantity low Crew Alert System (CAS). There were no other indications of a problem and the weather was good so I elected to continue to our destination. When on a visual approach the flaps would not come down and [we] got hydraulic main low. I called for the gear down which was slow; but came down. At that point I thought the best action was to [divert to another airport] for a longer runway. I landed the aircraft with normal braking and had no problems taxiing to the ramp.We got a white CAS but didn't think it was a problem until we had trouble getting the landing gear down.We went to an airport with a longer runway in case we did not have hydraulics for brakes.
LR-45 Captain reported diverting to a suitable alternate when they got a CAS for low hydraulic quantity.