Global Express (BD700)
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine
Flight Crew Last 90 Days 76; Flight Crew Total 4350; Flight Crew Type 1008
Troubleshooting; Workload
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition; General Maintenance Action
Aircraft; Human Factors; Procedure
Just after passing ZZZ Intersection we received an amber 'HYD 1 LO QTY' CAS message. We then displayed the hydraulic synoptic on the #4 DU for review and initiated the appropriate checklist. On the synoptic; we noticed the hydraulic system 1 quantity at 16% fluid and depleting rapidly. Anticipating total fluid loss we reviewed the HYD 1 LO PRESS checklist as a precaution; discussed situation; and elected to divert the aircraft to ZZZZ. In the descent to ZZZZ and hydraulic system 1 quantity at 6%; we started the APU and elected to perform a precautionary shutdown of the #1 engine. This was done after discussion and systems review to prevent possible further safety issues and aircraft system damage.  [ATC was advised] at this time to ensure flight safety and priority handling. Shortly after precautionary engine shutdown; the quantity and pressure on hydraulic system 1 fully depleted. We then completed all appropriate single engine approach and landing checklists and subsequent single engine landing at ZZZZ with no further flight issues.
A Bombardier Global Express HYD 1 LO QTY CAS alerted so the crew completed the HYD 1 LO PRESS Checklist. They then secured the #1 engine as a precaution and diverted to the nearby airport.