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B737 first officer reports inadvertently turning off the B hydraulic pumps when asked by the captain to turn of the engine anti-ice. The error is quickly discovered and corrected. The yaw damper switch then trips and is restored.
| Attributes | |
| ACN | 957365 |
| Time | |
| Date | 201107 |
| Local Time Of Day | 0001-0600 |
| Component | |
| Aircraft Component | Hydraulic System Pump |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
First leg of a three leg day for a three day trip. I was the pilot monitoring. On departure the captain called for the 'engine anti-ice'. I turned on the ignition switches and the 'engine anti-ice' switches. After exiting the weather; the captain told me to turn off the 'engine anti-ice'. I accidentally turned off the 'B' hydraulic pumps. Once the error was discovered the pumps were turned back on and the 'engine anti-ice' was turned off. Then the yaw dampener switch tripped. The captain transferred control of the aircraft to me and ran the qrc. The yaw dampener was restored; a logbook entry was made and the flight continued. The location and similarity of the switches may have contributed. Failure to properly identify a switch before turning it off. Interference with ATC/pilot workload.
Original NASA ASRS Text
Title: B737 First Officer reports inadvertently turning off the B hydraulic pumps when asked by the Captain to turn of the engine anti-ice. The error is quickly discovered and corrected. The yaw damper switch then trips and is restored.
Narrative: First leg of a three leg day for a three day trip. I was the Pilot monitoring. On departure the Captain called for the 'Engine Anti-Ice'. I turned on the ignition switches and the 'Engine Anti-ice' switches. After exiting the weather; the Captain told me to turn off the 'Engine Anti-ice'. I accidentally turned off the 'B' hydraulic pumps. Once the error was discovered the pumps were turned back on and the 'Engine Anti-ice' was turned off. Then the Yaw dampener switch tripped. The Captain transferred control of the aircraft to me and ran the QRC. The Yaw dampener was restored; a logbook entry was made and the flight continued. The location and similarity of the switches may have contributed. Failure to properly identify a switch before turning it off. Interference with ATC/pilot workload.
Data retrieved from NASA's ASRS site as of April 2012 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.