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A B757-200 in cruise at FL390 declared an emergency and diverted due to loss of left hydraulic system caused by left engine driven pump failure.
| Attributes | |
| ACN | 477774 |
| Time | |
| Date | 200007 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : den.airport |
| State Reference | CO |
| Altitude | msl single value : 39000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : j60.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 175 flight time total : 6800 flight time type : 741 |
| ASRS Report | 477774 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : left engine vibration indicator other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
At FL390 left engine vibration went from .1 to 1.7 with a surge sound associated with the vibration. Seconds later aircraft lost left hydraulic system with associated lights. Turned towards den advised ATC of situation, declared emergency. Followed communication procedures. Lost all autoplts. Used alternate flaps and gear extension. Uneventful landing. Callback conversation with reporter revealed the following information: the reporter stated that just prior to the engine hydraulic pump failing the engine vibrated and the engine vibration indicator went from .1 to 1.7. The reporter said the vibration was felt in the cockpit.
Original NASA ASRS Text
Title: A B757-200 IN CRUISE AT FL390 DECLARED AN EMER AND DIVERTED DUE TO LOSS OF L HYD SYS CAUSED BY L ENG DRIVEN PUMP FAILURE.
Narrative: AT FL390 L ENG VIBRATION WENT FROM .1 TO 1.7 WITH A SURGE SOUND ASSOCIATED WITH THE VIBRATION. SECONDS LATER ACFT LOST L HYD SYS WITH ASSOCIATED LIGHTS. TURNED TOWARDS DEN ADVISED ATC OF SIT, DECLARED EMER. FOLLOWED COM PROCS. LOST ALL AUTOPLTS. USED ALTERNATE FLAPS AND GEAR EXTENSION. UNEVENTFUL LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT JUST PRIOR TO THE ENG HYD PUMP FAILING THE ENG VIBRATED AND THE ENG VIBRATION INDICATOR WENT FROM .1 TO 1.7. THE RPTR SAID THE VIBRATION WAS FELT IN THE COCKPIT.
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.