An A319 encountered wake turbulence following a B757.

Narrative:

Wake turbulence encounter: climbing through FL180 15NM west of lin VOR we encountered moderate turbulence with a 20 degree uncommanded roll to the right. First officer corrected and leveled off as we were sure it was wake turbulence. ATC reported; when asked; that we were following a B757. TCAS showed the traffic at 16 miles in front and +4300 ft above and climbing. Winds on the nd showed off the nose 060/15. No injuries and we asked to climb offset 1 mile right until cruise. No further wake turbulence was encountered.

Original NASA ASRS Text

Title: An A319 encountered wake turbulence following a B757.

Narrative: Wake turbulence encounter: climbing through FL180 15NM west of LIN VOR we encountered moderate turbulence with a 20 degree uncommanded roll to the right. First Officer corrected and leveled off as we were sure it was wake turbulence. ATC reported; when asked; that we were following a B757. TCAS showed the traffic at 16 miles in front and +4300 FT above and climbing. Winds on the ND showed off the nose 060/15. No injuries and we asked to climb offset 1 mile right until cruise. No further wake turbulence was encountered.

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.

Attributes
ACN	852830
Time
Date	200909
Local Time Of Day	1801-2400
Place
Locale Reference	ZOA.ARTCC
State Reference	CA
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Captain Check Pilot Pilot Not Flying
Experience	Flight Crew Last 90 Days 210 Flight Crew Total 21000 Flight Crew Type 9000
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter