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Upon descending to exit moderate to severe turbulence; the flight crew of a B747 was met by a hydraulic system one failure. They continued to descend to an efficient altitude and landed uneventfully.
| Attributes | |
| ACN | 1241940 |
| Time | |
| Date | 201502 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZOA.ARTCC |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Hydraulic System |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 240 Flight Crew Total 14800 Flight Crew Type 6000 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 20000 Flight Crew Type 10000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter Weather / Turbulence |
Narrative:
In block altitude FL370/390; encountered severe turbulence; descended to FL350 to light turbulence. All crew and passenger seated....no injuries...ATC and dispatch notified. Shortly after the turbulence encounter; the #1 hydraulic system failed. Accomplished the appropriate check list. Continued to [destination].....and landed [safely]. We were able to clear the runway (no nose gear or body steering). Shut down the engines and got towed into the gate. Debriefed with the base chief pilot.
Original NASA ASRS Text
Title: Upon descending to exit moderate to severe turbulence; the flight crew of a B747 was met by a hydraulic system one failure. They continued to descend to an efficient altitude and landed uneventfully.
Narrative: In block altitude FL370/390; encountered severe turbulence; descended to FL350 to light turbulence. All crew and PAX seated....no injuries...ATC and Dispatch notified. Shortly after the turbulence encounter; the #1 Hydraulic system failed. Accomplished the appropriate check list. Continued to [destination].....and landed [safely]. We were able to clear the runway (no nose gear or body steering). Shut down the engines and got towed into the gate. Debriefed with the base Chief Pilot.
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.