Cirrus pilot reported encountering wake turbulence on approach to bfi on a parallel approach with a ...

Narrative:

I was flying with instructor on PAPI for 14L at approximately 600 feet; well situated for landing; when I saw the boeing heavy on my right; it having come up behind us and to the right for parallel runway; and almost immediately; I felt huge wake turbulence. (I described it to pilot friend as herd of elephants stomping on right wing). I was flying; instructor was handling radio. We were at the end of the day after refresher training; something I do very regularly (approximately 2x per year. Plane lurched down dramatically and to the right. Flight instructor immediately took control. We were very close to ground pointed westward when pilot regained control and pulled it out. ATC witnessed and later I spoke to ATC supervisor. Boeing has parallel runways; and we had not encroached on the approach for 14R. There was a quartering tailwind; which I think caused the wake turbulence of the heavy to drift over and down onto my plane. I didn't see the heavy until right before turbulence hit. I knew it was in the general vicinity; but didn't know it was that close - it had been behind us and was on different radio. We had hugged the shoreline prior to final approach because there was a plane at 1;200 feet not on radio circling elliott bay.

Original NASA ASRS Text

Title: Cirrus pilot reported encountering wake turbulence on approach to BFI on a parallel approach with a Boeing Heavy that resulted in control difficulties at low altitude.

Narrative: I was flying with Instructor on PAPI for 14L at approximately 600 feet; well situated for landing; when I saw the Boeing Heavy on my right; it having come up behind us and to the right for parallel runway; and almost immediately; I felt huge wake turbulence. (I described it to pilot friend as herd of elephants stomping on right wing). I was flying; Instructor was handling radio. We were at the end of the day after refresher training; something I do very regularly (approximately 2x per year. Plane lurched down dramatically and to the right. Flight Instructor immediately took control. We were very close to ground pointed westward when pilot regained control and pulled it out. ATC witnessed and later I spoke to ATC supervisor. Boeing has parallel runways; and we had not encroached on the approach for 14R. There was a quartering tailwind; which I think caused the wake turbulence of the Heavy to drift over and down onto my plane. I didn't see the Heavy until right before turbulence hit. I knew it was in the general vicinity; but didn't know it was that close - it had been behind us and was on different radio. We had hugged the shoreline prior to final approach because there was a plane at 1;200 feet not on radio circling Elliott Bay.

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.

Attributes
ACN	1728294
Time
Date	202002
Local Time Of Day	1201-1800
Place
Locale Reference	BFI.Airport
State Reference	WA
Environment
Light	Daylight
Aircraft 1
Make Model Name	Cirrus Aircraft Undifferentiated
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	VFR
Aircraft 2
Make Model Name	Boeing Company Undifferentiated or Other Model
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Instrument
Experience	Flight Crew Last 90 Days 10 Flight Crew Total 430 Flight Crew Type 430
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Loss Of Aircraft Control

Cirrus pilot reported encountering wake turbulence on approach to bfi on a parallel approach with a boeing heavy that resulted in control difficulties at low altitude.