Narrative:

While climbing through FL320 with autopilot 1 and autothrust engaged we encountered what we suspect was moderate wake turbulence causing approximately a 20 degree left bank. Immediately upon encountering the wake turbulence a loud bang was heard from the #2 engine with a simultaneous engine #2 stall ECAM. Pilot flying immediately retarded the #2 thrust lever to idle in accordance with the qrc memory item and the ECAM cleared. Pilot flying disengaged the autopilot and autothrust and called for the engine surge/stall checklist. Pilot not flying accomplished both the engine surge/stall and overweight landing checklists. #2 engine parameters appeared normal. Pilot flying assumed radio duties and declared an emergency with center; requesting an immediate vector to the nearest suitable airport in point of time. Center advised us of the weather and we relayed the souls and fuel on board. Pilot not flying sent a message via ACARS to company dispatch of emergency and intentions. Pilot flying advised the purser and passengers. Pilot not flying requested landing performance data from dispatch which printed out moments later. We were given vectors for the visual approach. The approach and landing were uneventful; with a touchdown sink rate of less than 200 ft per minute. We exited the runway; and requested that the fire crews look over our #2 engine. No signs of damage or fire were observed. We then taxied to the gate and deplaned. During deplaning; several passengers informed us that they witnessed a bright flash from the #2 engine.

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Original NASA ASRS Text

Title: A319 flight crew reported a wake vortex encounter in climb at FL320 that resulted in a 20-25 degree roll and #2 engine stall. Crew declared emergency and diverted to nearest suitable airport.

Narrative: While climbing through FL320 with autopilot 1 and autothrust engaged we encountered what we suspect was moderate wake turbulence causing approximately a 20 degree left bank. Immediately upon encountering the wake turbulence a loud bang was heard from the #2 engine with a simultaneous Engine #2 Stall ECAM. Pilot flying immediately retarded the #2 thrust lever to idle in accordance with the QRC memory item and the ECAM cleared. Pilot flying disengaged the autopilot and autothrust and called for the Engine Surge/Stall Checklist. Pilot not flying accomplished both the Engine Surge/Stall and Overweight Landing checklists. #2 engine parameters appeared normal. Pilot flying assumed radio duties and declared an emergency with Center; requesting an immediate vector to the nearest suitable airport in point of time. Center advised us of the weather and we relayed the souls and fuel on board. Pilot not flying sent a message via ACARS to company Dispatch of emergency and intentions. Pilot flying advised the Purser and passengers. Pilot not flying requested landing performance data from Dispatch which printed out moments later. We were given vectors for the visual approach. The approach and landing were uneventful; with a touchdown sink rate of less than 200 FT per minute. We exited the runway; and requested that the fire crews look over our #2 engine. No signs of damage or fire were observed. We then taxied to the gate and deplaned. During deplaning; several passengers informed us that they witnessed a bright flash from the #2 engine.

Data retrieved from NASA's ASRS site as of July 2013 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.