Cl-300 captain reported receiving multiple indications of hydraulic system failure on approach.

Attributes
ACN	1618437
Time
Date	201902
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Marginal
Aircraft 1
Make Model Name	Challenger 300
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

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.

Original NASA ASRS Text

Title: CL-300 Captain reported receiving multiple indications of hydraulic system failure on approach.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.