C172 instructor and solo student reported loss of directional control on the takeoff roll when the s...

Attributes
ACN	1343823
Time
Date	201603
Local Time Of Day	0601-1200
Place
Locale Reference	TOA.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	VFR
Aircraft 2
Make Model Name	Cessna Citation Undifferentiated or Other Model
Flight Phase	Climb
Person 1
Function	Instructor
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 12000 Flight Crew Type 500
Person 2
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Student
Experience	Flight Crew Total 21 Flight Crew Type 14
Events
Anomaly	Ground Event / Encounter Loss Of Aircraft Control Ground Excursion Runway Inflight Event / Encounter Wake Vortex Encounter

Narrative:

After completing two takeoffs and landings on runway 29R with my student; I endorsed him for solo flight and I exited the airplane at transient parking (midfield) so I could observe him. He performed two takeoffs and landings solo on runway 29R. During his third takeoff; he accelerated normally; then I heard him reduce power and saw him traveling left of runway 29R in the midfield grass. He came to a stop west of taxiway C in the grass; notified ground control; and shut down the aircraft. He was assisted by airport operations personnel. There were no injuries and no damage to any aircraft. Weather was good during his flight and winds were variable at 6 knots or less. Prior to his third take off; a cessna citation departed the same runway. He was advised of wake turbulence. Student stated that he noticed the airplane veering to the left and attempted to correct to the right; but was unable to correct. After assessing student for injuries or signs of distress; we debriefed the event. Prior to his next flight; we will review wake turbulence; crosswind technique; rudder usage and aborted takeoff procedures and he will complete remedial flight training in those above areas as well.

Original NASA ASRS Text

Title: C172 instructor and solo student reported loss of directional control on the takeoff roll when the student encountered wake turbulence from the preceding Cessna Citation.

Narrative: After completing two takeoffs and landings on runway 29R with my student; I endorsed him for solo flight and I exited the airplane at transient parking (midfield) so I could observe him. He performed two takeoffs and landings solo on runway 29R. During his third takeoff; he accelerated normally; then I heard him reduce power and saw him traveling left of runway 29R in the midfield grass. He came to a stop west of taxiway C in the grass; notified ground control; and shut down the aircraft. He was assisted by airport operations personnel. There were no injuries and no damage to any aircraft. Weather was good during his flight and winds were variable at 6 knots or less. Prior to his third take off; a Cessna Citation departed the same runway. He was advised of wake turbulence. Student stated that he noticed the airplane veering to the left and attempted to correct to the right; but was unable to correct. After assessing student for injuries or signs of distress; we debriefed the event. Prior to his next flight; we will review wake turbulence; crosswind technique; rudder usage and aborted takeoff procedures and he will complete remedial flight training in those above areas as well.

Data retrieved from NASA's ASRS site 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.

C172 instructor and solo student reported loss of directional control on the takeoff roll when the student encountered wake turbulence from the preceding cessna citation.