Challenger 300
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Less Severe
Flight Crew Returned To Departure Airport
Aircraft
Low hydraulic pressure CAS illuminated and loud grinding noise simultaneously when gear selected down and flaps selected 20 degrees. No safe gear indication forced a go-around. [Coordinated with ATC] and after landing aircraft had to be towed off the runway.Due to aircraft warning system activation; coupled with noticeable grinding noise; vibration and loss of hydraulic pressure on left side; the crew [coordinated with ATC] and performed checklist items followed by emergency landing.
CL-300 Captain reported receiving multiple indications of hydraulic system failure on approach.