A bombardier global express hydraulic 1 lo qty cas alerted so the crew completed the hydraulic 1 lo ...

Attributes
ACN	1307071
Time
Date	201510
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Global Express (BD700)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct Oceanic
Flight Plan	IFR
Component
Aircraft Component	Hydraulic System
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 76 Flight Crew Total 4350 Flight Crew Type 1008
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Just after passing ZZZ intersection we received an amber 'hydraulic 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 hydraulic 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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

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.

A bombardier global express hydraulic 1 lo qty cas alerted so the crew completed the hydraulic 1 lo press checklist. They then secured the #1 engine as a precaution and diverted to the nearby airport.