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A BA3200 on descent declared an emergency and diverted due to complete loss of the main hydraulic system caused by the right engine driven pump breaking apart.
| Attributes | |
| ACN | 376429 |
| Time | |
| Date | 199708 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : stl |
| State Reference | MO |
| Altitude | msl bound lower : 6000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : stl |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 32 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent other other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 4900 flight time type : 2000 |
| ASRS Report | 376429 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Upon descent to 6000 ft the left hydraulic pump pressure gauge dropped to zero, followed soon thereafter by the right pump pressure. My first officer continued to fly the aircraft as I ran through all available checklists and conversed with maintenance as to an appropriate course of action. We managed to get the gear down through normal means. The remaining normal and emergency hydraulic accumulator gauges were gradually dropping to zero. At this point I elected to declare an emergency and proceed to st louis. I then took control of the aircraft while my first officer briefed the passenger. The fire trucks were standing by in case we could not steer or stop the aircraft on the ground. The landing was uneventful with no problems. The aircraft was safely stopped and shut down. Maintenance then towed the aircraft to the ramp. The passenger deplaned normally. Maintenance discovered later that the right hydraulic pump failed and broke apart, causing us to lose all normal hydraulic fluid.
Original NASA ASRS Text
Title: A BA3200 ON DSCNT DECLARED AN EMER AND DIVERTED DUE TO COMPLETE LOSS OF THE MAIN HYD SYS CAUSED BY THE R ENG DRIVEN PUMP BREAKING APART.
Narrative: UPON DSCNT TO 6000 FT THE L HYD PUMP PRESSURE GAUGE DROPPED TO ZERO, FOLLOWED SOON THEREAFTER BY THE R PUMP PRESSURE. MY FO CONTINUED TO FLY THE ACFT AS I RAN THROUGH ALL AVAILABLE CHKLISTS AND CONVERSED WITH MAINT AS TO AN APPROPRIATE COURSE OF ACTION. WE MANAGED TO GET THE GEAR DOWN THROUGH NORMAL MEANS. THE REMAINING NORMAL AND EMER HYD ACCUMULATOR GAUGES WERE GRADUALLY DROPPING TO ZERO. AT THIS POINT I ELECTED TO DECLARE AN EMER AND PROCEED TO ST LOUIS. I THEN TOOK CTL OF THE ACFT WHILE MY FO BRIEFED THE PAX. THE FIRE TRUCKS WERE STANDING BY IN CASE WE COULD NOT STEER OR STOP THE ACFT ON THE GND. THE LNDG WAS UNEVENTFUL WITH NO PROBS. THE ACFT WAS SAFELY STOPPED AND SHUT DOWN. MAINT THEN TOWED THE ACFT TO THE RAMP. THE PAX DEPLANED NORMALLY. MAINT DISCOVERED LATER THAT THE R HYD PUMP FAILED AND BROKE APART, CAUSING US TO LOSE ALL NORMAL HYD FLUID.
Data retrieved from NASA's ASRS site as of July 2007 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.