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MD80 encountered wake turbulence following B757. Aircraft rolled left and right; disengaging autopilot.
| Attributes | |
| ACN | 756008 |
| Time | |
| Date | 200709 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : bos.airport |
| State Reference | MA |
| Altitude | msl single value : 24000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : gdm |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : gdm |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 756008 |
| Events | |
| Anomaly | inflight encounter : wake turbulence other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : exited adverse environment |
| Supplementary | |
| Problem Areas | Environmental Factor |
| Primary Problem | Environmental Factor |
Narrative:
Descending on the GDM3 into bos we encountered wake turbulence which rolled aircraft around 15 to 20 degrees left and right with the corresponding 'shudder.' autoplt kicked off. Leveled off slightly and flew out of it. Checked on cabin; all was well. Inquired with ZBW and was told it was a B757. He was 12 miles ahead; same arrival and a little over 2000 ft below. Surprised that we encountered it so far behind him. If I remember correctly we had a left to right quartering tailwind of 30 KTS.
Original NASA ASRS Text
Title: MD80 ENCOUNTERED WAKE TURB FOLLOWING B757. ACFT ROLLED LEFT AND RIGHT; DISENGAGING AUTOPILOT.
Narrative: DESCENDING ON THE GDM3 INTO BOS WE ENCOUNTERED WAKE TURB WHICH ROLLED ACFT AROUND 15 TO 20 DEGS LEFT AND RIGHT WITH THE CORRESPONDING 'SHUDDER.' AUTOPLT KICKED OFF. LEVELED OFF SLIGHTLY AND FLEW OUT OF IT. CHKED ON CABIN; ALL WAS WELL. INQUIRED WITH ZBW AND WAS TOLD IT WAS A B757. HE WAS 12 MILES AHEAD; SAME ARR AND A LITTLE OVER 2000 FT BELOW. SURPRISED THAT WE ENCOUNTERED IT SO FAR BEHIND HIM. IF I REMEMBER CORRECTLY WE HAD A LEFT TO RIGHT QUARTERING TAILWIND OF 30 KTS.
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.