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A DHC8-200 on final approach at 3000 ft declared an emergency due to los of #1 hydraulic system pressure and quantity caused by failed reservoir fitting.
| Attributes | |
| ACN | 504029 |
| Time | |
| Date | 200102 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 9r |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : multi engine pilot : commercial pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 178 flight time total : 2100 flight time type : 226 |
| ASRS Report | 504029 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : #1 hydraulic quantity ind. other flight crewa other flight crewb |
| Resolutory Action | flight crew : landed in emergency condition flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
While being vectored for the ILS runway 9R, a few seconds after putting in some left rudder trim, the caution lights for the #1 hydraulic system came on. The forward full pressure (3000 psi) also came on. We then checked the hydraulic gauges and found we had no quantity in system #1. We then pulled out the emergency checklist and proceeded with the checklist. Then we notified the tower and declared an emergency with the equipment standing by. We then landed with no flaps and no normal braking. The landing was normal otherwise, only a longer rollout -- we did not need to use reverse. We also notified the flight attendant of the situation. After landing, we taxied in using differential thrust and the parking brake which is off system #2. Following shutdown and upon further inspection, the mechanic found a hydraulic nipple sheared near the #1 hydraulic reservoir. This was reported and the system was blead twice. Then the aircraft was back in service.
Original NASA ASRS Text
Title: A DHC8-200 ON FINAL APCH AT 3000 FT DECLARED AN EMER DUE TO LOS OF #1 HYD SYS PRESSURE AND QUANTITY CAUSED BY FAILED RESERVOIR FITTING.
Narrative: WHILE BEING VECTORED FOR THE ILS RWY 9R, A FEW SECONDS AFTER PUTTING IN SOME L RUDDER TRIM, THE CAUTION LIGHTS FOR THE #1 HYD SYS CAME ON. THE FORWARD FULL PRESSURE (3000 PSI) ALSO CAME ON. WE THEN CHKED THE HYD GAUGES AND FOUND WE HAD NO QUANTITY IN SYS #1. WE THEN PULLED OUT THE EMER CHKLIST AND PROCEEDED WITH THE CHKLIST. THEN WE NOTIFIED THE TWR AND DECLARED AN EMER WITH THE EQUIP STANDING BY. WE THEN LANDED WITH NO FLAPS AND NO NORMAL BRAKING. THE LNDG WAS NORMAL OTHERWISE, ONLY A LONGER ROLLOUT -- WE DID NOT NEED TO USE REVERSE. WE ALSO NOTIFIED THE FLT ATTENDANT OF THE SIT. AFTER LNDG, WE TAXIED IN USING DIFFERENTIAL THRUST AND THE PARKING BRAKE WHICH IS OFF SYS #2. FOLLOWING SHUTDOWN AND UPON FURTHER INSPECTION, THE MECH FOUND A HYD NIPPLE SHEARED NEAR THE #1 HYD RESERVOIR. THIS WAS RPTED AND THE SYS WAS BLEAD TWICE. THEN THE ACFT WAS BACK IN SVC.
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.