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An EMB170 attempting to avoid a B757 wake turbulence deviated from the TRACON assigned heading departure bos runway 9.
| Attributes | |
| ACN | 768121 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : bos.airport |
| State Reference | MA |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : a90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 170/175 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : a90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 242 flight time type : 300 |
| ASRS Report | 768121 |
| Events | |
| Anomaly | inflight encounter : wake turbulence non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took precautionary avoidance action flight crew : exited adverse environment |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Airspace Structure Environmental Factor |
| Primary Problem | Environmental Factor |
Narrative:
After departing bos runway 9 behind a 757 on a heading of 093 degrees; we were assigned a right turn to a heading of 180 degrees. I mistakenly scrolled the heading bug to the left and the autoplt turned left as directed. The PNF called aloud 'right turn; right turn' a moment later and several degrees in the wrong direction; it occurred to me that I had turned left and not right. I immediately used tcs to turn back to the right; at the same time; departure control questioned us and we informed them that we were currently turning back. The controller stopped us on our heading of 080 degrees; worked on a new heading and turned us to the left for additional vectors. During the initial climb; we encountered wake turbulence from the B757 that departed prior to us. The B757 was in a right turn and I was thinking we needed a left turn to stay clear of their wake. I was so focused on avoiding the wake turbulence I accidentally turned left. In the future; I need to stay focused on flying the aircraft and not get tunnel vision on one aspect of the flight.
Original NASA ASRS Text
Title: AN EMB170 ATTEMPTING TO AVOID A B757 WAKE TURBULENCE DEVIATED FROM THE TRACON ASSIGNED HDG DEP BOS RWY 9.
Narrative: AFTER DEPARTING BOS RWY 9 BEHIND A 757 ON A HDG OF 093 DEGS; WE WERE ASSIGNED A R TURN TO A HDG OF 180 DEGS. I MISTAKENLY SCROLLED THE HDG BUG TO THE L AND THE AUTOPLT TURNED L AS DIRECTED. THE PNF CALLED ALOUD 'RIGHT TURN; RIGHT TURN' A MOMENT LATER AND SEVERAL DEGS IN THE WRONG DIRECTION; IT OCCURRED TO ME THAT I HAD TURNED L AND NOT R. I IMMEDIATELY USED TCS TO TURN BACK TO THE R; AT THE SAME TIME; DEP CTL QUESTIONED US AND WE INFORMED THEM THAT WE WERE CURRENTLY TURNING BACK. THE CTLR STOPPED US ON OUR HDG OF 080 DEGS; WORKED ON A NEW HDG AND TURNED US TO THE L FOR ADDITIONAL VECTORS. DURING THE INITIAL CLB; WE ENCOUNTERED WAKE TURB FROM THE B757 THAT DEPARTED PRIOR TO US. THE B757 WAS IN A R TURN AND I WAS THINKING WE NEEDED A L TURN TO STAY CLR OF THEIR WAKE. I WAS SO FOCUSED ON AVOIDING THE WAKE TURB I ACCIDENTALLY TURNED L. IN THE FUTURE; I NEED TO STAY FOCUSED ON FLYING THE ACFT AND NOT GET TUNNEL VISION ON ONE ASPECT OF THE FLT.
Data retrieved from NASA's ASRS site as of January 2009 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.