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An air carrier flight crew flying a dhc-8 on takeoff experienced wake turbulence from a B737 that departed in front of them.
| Attributes | |
| ACN | 441191 |
| Time | |
| Date | 199906 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | agl bound lower : 30 agl bound upper : 50 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sea.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff |
| Route In Use | departure sid : ns |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 150 flight time total : 5500 flight time type : 2200 |
| ASRS Report | 441191 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Events | |
| Anomaly | inflight encounter : wake turbulence |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : regained aircraft control |
| Supplementary | |
| Problem Areas | ATC Human Performance Weather |
| Primary Problem | Ambiguous |
Narrative:
Departed behind B737, encountered dead center of wingtip vortices, rolled rapidly 30 degrees left, used nearly full right ailerons to counter, we leveled and then immediately encountered it again, 'not the normal ripple.' this time roll rate was faster and full aileron did not stop roll, used 1/2 to 3/4 of rudder to counter roll which worked. We were then able to sidestep the remaining wake.
Original NASA ASRS Text
Title: AN ACR FLC FLYING A DHC-8 ON TKOF EXPERIENCED WAKE TURB FROM A B737 THAT DEPARTED IN FRONT OF THEM.
Narrative: DEPARTED BEHIND B737, ENCOUNTERED DEAD CTR OF WINGTIP VORTICES, ROLLED RAPIDLY 30 DEGS L, USED NEARLY FULL R AILERONS TO COUNTER, WE LEVELED AND THEN IMMEDIATELY ENCOUNTERED IT AGAIN, 'NOT THE NORMAL RIPPLE.' THIS TIME ROLL RATE WAS FASTER AND FULL AILERON DID NOT STOP ROLL, USED 1/2 TO 3/4 OF RUDDER TO COUNTER ROLL WHICH WORKED. WE WERE THEN ABLE TO SIDESTEP THE REMAINING WAKE.
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.