Falcon 50 flight crew reported CAS Check Hydraulic Quantity Amber Message appeared. The flight crew ran the appropriate checklist and established that they had Combined (Left hand) HYD Loss of Fluid; but without System Pressure Loss. The flight crew continued to destination airport; asking for delay vectors for manual landing gear extension and blow down be performed. The flight crew landed without additional issues at destination airport.
Synopsis
Falcon 50 flight crew reported CAS Check Hydraulic Quantity Amber Message appeared. The flight crew ran the appropriate checklist and established that they had Combined (Left hand) HYD Loss of Fluid; but without System Pressure Loss. The flight crew continued to destination airport; asking for delay vectors for manual landing gear extension and blow down be performed. The flight crew landed without additional issues at destination airport.
Narrative
Crew Alert System Check Hydraulic Quantity Amber Message appeared. We ran the appropriate checklist and established that we had Combined (Left hand) HYD loss of fluid; but without system pressure loss. We were Close to our top of descent point and continued to our planned destination ZZZ. We complied with the most applicable QRH Checklist. During early gear extension the gear lever remained Red; with no down and locked indication. At this stage there was an indicated loss of System Pressure noted for the first time. We were vectored off the initial approach to the north for a few miles. As a result of the loss of Hyd Pressure and Quantity we continued with the checklist and accomplished the Alternate Landing Gear Extension. From that point we were vectored back on to the RNAV XX Approach and made an otherwise normal Flaps 20 Landing without incident; vacating at Taxiway 1. It is vital to use good CRM in scenario troubleshooting; ESPECIALLY in a case like this where the actual condition ( IE Loss of Hyd Fluid Quantity but no loss of Hyd Pressure) is not EXACTLY described in the name of the most applicable Checklist - as is found on QRH page XX.
Second reporter narrative
In-flight had Low Combined Hydraulic Quantity but had Pressure . Followed checklist and continued to ZZZ. Prior to approach loss combined pressure. Asked ATC for delaying vectors to accomplish checklist which took us through the landing checks. Landing gear doors opened and gear did not extend preformed the alternate extension. Gear was confirmed down and locked and we conducted a partial flaps landing without incident. Once Passengers departed the airfield we reported these issues to Maintenance. Pinned the landing gear and landing gear doors. During post flight hydraulic fluid leaking from tail section.Amber Crew Alert System CHECK HYD QUANTITY & CMB (Combined) HYD FAIL - Gear was down and locked we did not declare or ask for assistance.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.