C172 instructor pilot reported his aircraft was upset at low altitude on approach to pdk when encoun...

Attributes
ACN	1369117
Time
Date	201605
Local Time Of Day	1201-1800
Place
Locale Reference	PDK.Airport
State Reference	GA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Landing
Flight Plan	None
Aircraft 2
Make Model Name	Commercial Fixed Wing
Flight Phase	Taxi
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 2670 Flight Crew Type 1200
Events
Anomaly	Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

Pdk has parallel runways 390 feet apart. A jet was awaiting takeoff clearance between the runways. We were cleared to land on runway 3L. The student was flying; we were on short final when the jet was cleared for takeoff on 3R. When we passed behind the jet we were about 20 feet AGL and the plane was blown sideways to the edge of the runway and instantly banked 60 degrees left. I took over the controls and landed the aircraft.this situation occurs frequently at pdk; when it does I instruct the student to land long to avoid the jet blast. This time I was occupied correcting the student's crosswind technique and failed to notice the jet waiting to takeoff.the tower is good at reminding pilots of wake turbulence. A reminder of possible jet blast could have made a difference.

Original NASA ASRS Text

Title: C172 instructor pilot reported his aircraft was upset at low altitude on approach to PDK when encountering jet blast from an aircraft awaiting takeoff clearance.

Narrative: PDK has parallel runways 390 feet apart. A jet was awaiting takeoff clearance between the runways. We were cleared to land on runway 3L. The student was flying; we were on short final when the jet was cleared for takeoff on 3R. When we passed behind the jet we were about 20 feet AGL and the plane was blown sideways to the edge of the runway and instantly banked 60 degrees left. I took over the controls and landed the aircraft.This situation occurs frequently at PDK; when it does I instruct the student to land long to avoid the jet blast. This time I was occupied correcting the student's crosswind technique and failed to notice the jet waiting to takeoff.The Tower is good at reminding pilots of wake turbulence. A reminder of possible jet blast could have made a difference.

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 pilot reported his aircraft was upset at low altitude on approach to pdk when encountering jet blast from an aircraft awaiting takeoff clearance.