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Md-10 first officer reported loss of fluid in hydraulic system 3 at top of descent. They declared an emergency and executed a normal landing.
| Attributes | |
| ACN | 1083590 |
| Time | |
| Date | 201304 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | DC-10 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Component | |
| Aircraft Component | Hydraulic Main System |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Commercial |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Near top of descent we received a level 1 alert 'hyd 3 elev off'. The captain noted that number 3 hydraulic quantity was slowly decreasing. We reviewed the hydraulic 3 fail checklist just to be prepared in the event of further fluid loss. As a precaution; we declared an emergency and provided approach control with the requested information. The quantity continued to decrease and we decided to lower the gear around 20 miles out to prevent us from needing to use the alternate gear extension. At around 15 miles out we received 'hyd 3 quant low'. The captain flew a visual approach without further incident. Upon landing we elected to make a left turn as we had discussed due to possible limitations with the aircraft's ability to turn right. Once clear of the runway; we coordinated with ground control and told them we were capable of taxiing to the gate on our own. While taxiing in; we received 'hyd 3 fail'. We were able to taxi without incident to our assigned gate.
Original NASA ASRS Text
Title: MD-10 First Officer reported loss of fluid in Hydraulic System 3 at top of descent. They declared an emergency and executed a normal landing.
Narrative: Near top of descent we received a Level 1 alert 'Hyd 3 Elev Off'. The Captain noted that Number 3 Hydraulic quantity was slowly decreasing. We reviewed the Hydraulic 3 Fail Checklist just to be prepared in the event of further fluid loss. As a precaution; we declared an emergency and provided Approach Control with the requested information. The quantity continued to decrease and we decided to lower the gear around 20 miles out to prevent us from needing to use the alternate gear extension. At around 15 miles out we received 'Hyd 3 quant low'. The Captain flew a visual approach without further incident. Upon landing we elected to make a left turn as we had discussed due to possible limitations with the aircraft's ability to turn right. Once clear of the runway; we coordinated with Ground Control and told them we were capable of taxiing to the gate on our own. While taxiing in; we received 'Hyd 3 Fail'. We were able to taxi without incident to our assigned gate.
Data retrieved from NASA's ASRS site as of July 2013 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.