Wake turbulence from a previously departed aircraft may have caused a C172 pilot to lose control aft...

Attributes
ACN	842039
Time
Date	200907
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	None
Flight Plan	None
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 1.5 Flight Crew Total 69.0 Flight Crew Type 60.6
Events
Anomaly	Ground Excursion Runway Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Narrative:

I was flying in the traffic pattern performing touch and goes. This occurred during my second touch and go. When I was on base leg of approach; I was informed by tower to beware of wake turbulence from a citation jet taking off. On transition from base to final; the citation took off; and I noted their point of rotation. I touched down before that point. My intention was a touch and go. The touchdown was smooth; without issue. Approximately 200-300 ft after touchdown; the plane veered right. I attempted to correct with left rudder pedal; but it continued to veer right. I verified I was using proper left pedal; but aircraft veered off runway onto grass. No damage was noted to airplane.

Original NASA ASRS Text

Title: Wake turbulence from a previously departed aircraft may have caused a C172 pilot to lose control after touchdown. A runway excursion resulted.

Narrative: I was flying in the traffic pattern performing touch and goes. This occurred during my second touch and go. When I was on base leg of approach; I was informed by tower to beware of wake turbulence from a Citation jet taking off. On transition from base to final; the Citation took off; and I noted their point of rotation. I touched down before that point. My intention was a touch and go. The touchdown was smooth; without issue. Approximately 200-300 FT after touchdown; the plane veered right. I attempted to correct with left rudder pedal; but it continued to veer right. I verified I was using proper left pedal; but aircraft veered off runway onto grass. No damage was noted to airplane.

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.