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Air taxi captain reported main hydraulic system a had a decreasing system quantity; causing a diversion.
| Attributes | |
| ACN | 1742204 |
| Time | |
| Date | 202005 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Citation X (C750) |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Hydraulic Main System |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 3450 Flight Crew Type 1050 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
In cruise; we got a hydraulic a volume low message; it was down to 15%. We monitored and continued per the checklist. We discussed the possibility of losing more fluid on the landing gear deployment and continued flight. We were scheduled to land at ZZZ (7000 ft. Runway); but both agreed that if the volume dropped below 10% we would divert to ZZZ1 in order to use the 11;000 ft. Plus runway. This was just in case we were to lose all the remaining fluid volume upon thrust reverser deployment and use of brakes; which would force us to use our emergency/air brakes; significantly increasing our stopping distance. When we deployed the gear the volume dropped to 8% so per our plan diverted to ZZZ1 where we landed without incident.
Original NASA ASRS Text
Title: Air Taxi Captain reported main hydraulic system A had a decreasing system quantity; causing a diversion.
Narrative: In cruise; we got a HYD A Volume Low message; it was down to 15%. We monitored and continued per the checklist. We discussed the possibility of losing more fluid on the landing gear deployment and continued flight. We were scheduled to land at ZZZ (7000 ft. runway); but both agreed that if the volume dropped below 10% we would divert to ZZZ1 in order to use the 11;000 ft. plus runway. This was just in case we were to lose all the remaining fluid volume upon thrust reverser deployment and use of brakes; which would force us to use our emergency/air brakes; significantly increasing our stopping distance. When we deployed the gear the volume dropped to 8% so per our plan diverted to ZZZ1 where we landed without incident.
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.