Narrative:

Cruise at FL310, mach .80, suddenly light turbulence, then moderate, and roll right after left maximum bank 40 degrees. TCASII showed target 12 O'clock approximately 6 mi ahead. Once clear of the turbulence we asked center what type aircraft was at our 12 O'clock and reported the wake turbulence. B757 reported by the controller. No damage, no injuries, just another example of the far reaching effects of the B757. Callback conversation with reporter revealed the following information: the reporter stated he was flying a DA50. He stated he believed a significant cause of the wake encounter was the B757 was climbing through his altitude. If the B757 were level at his altitude or another altitude the encounter would not have been experienced. The reporter did not feel there was anything that could have been done differently. The controller had his separation and the pilot could not be expected to deviate from the airway. The pilot had requested higher but was unable due to traffic. He applauded the controller for handling all the traffic he was handling and felt under the circumstances the controller could not have been expected to advise of traffic climbing through his altitude ahead, but it would have been nice to know. He said he would not have turned off the airway on the basis of the advisory.

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Original NASA ASRS Text

Title: AT FL310, MACH PT 80 THE DA50 ENCOUNTERED SUDDEN LIGHT TURB, THEN MODERATE, AND THEN AN UNCOMMANDED 40 DEG ROLL R THEN L. TCASII SHOWED A TARGET 12 O'CLOCK APPROX 6 MI AHEAD. WHEN ASKED, THE CTR STATED THE ACFT WAS A B757. NO DAMAGE OR INJURIES OCCURRED.

Narrative: CRUISE AT FL310, MACH .80, SUDDENLY LIGHT TURB, THEN MODERATE, AND ROLL R AFTER L MAX BANK 40 DEGS. TCASII SHOWED TARGET 12 O'CLOCK APPROX 6 MI AHEAD. ONCE CLR OF THE TURB WE ASKED CTR WHAT TYPE ACFT WAS AT OUR 12 O'CLOCK AND RPTED THE WAKE TURB. B757 RPTED BY THE CTLR. NO DAMAGE, NO INJURIES, JUST ANOTHER EXAMPLE OF THE FAR REACHING EFFECTS OF THE B757. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED HE WAS FLYING A DA50. HE STATED HE BELIEVED A SIGNIFICANT CAUSE OF THE WAKE ENCOUNTER WAS THE B757 WAS CLBING THROUGH HIS ALT. IF THE B757 WERE LEVEL AT HIS ALT OR ANOTHER ALT THE ENCOUNTER WOULD NOT HAVE BEEN EXPERIENCED. THE RPTR DID NOT FEEL THERE WAS ANYTHING THAT COULD HAVE BEEN DONE DIFFERENTLY. THE CTLR HAD HIS SEPARATION AND THE PLT COULD NOT BE EXPECTED TO DEVIATE FROM THE AIRWAY. THE PLT HAD REQUESTED HIGHER BUT WAS UNABLE DUE TO TFC. HE APPLAUDED THE CTLR FOR HANDLING ALL THE TFC HE WAS HANDLING AND FELT UNDER THE CIRCUMSTANCES THE CTLR COULD NOT HAVE BEEN EXPECTED TO ADVISE OF TFC CLBING THROUGH HIS ALT AHEAD, BUT IT WOULD HAVE BEEN NICE TO KNOW. HE SAID HE WOULD NOT HAVE TURNED OFF THE AIRWAY ON THE BASIS OF THE ADVISORY.

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.