Local controller described a 'wake turbulence' event when a 'small' aircraft following a 'large' air...

Attributes
ACN	1049055
Time
Date	201211
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Small Aircraft
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

Narrative:

I was working local control west during an arrival bank. I had a small aircraft check in following a large aircraft in front; a B737. I issued caution wake turbulence you're following a B737 X miles ahead runway 34L cleared to land. I asked him to slow down at some point worried I may not have runway separation. When the small aircraft was about a 3 mile final he asked if he was cleared to land. I issued caution wake turbulence and cleared him to land again the preceding aircraft I believe was off the runway at this point. When the small aircraft was at a safe speed to receive further instruction I told him to turn right at A6 and contact ground 123.77. He responded with 'got beat up pretty bad'. I asked was it turbulence or wind shear? He responded with 'it was turbulence; and it about flipped us'. I don't think I said anything after that. I then reported it to the flm in charge.

Original NASA ASRS Text

Title: Local Controller described a 'wake turbulence' event when a 'small' aircraft following a 'large' aircraft indicated that the encounter 'almost flipped us'.

Narrative: I was working Local Control West during an arrival bank. I had a small aircraft check in following a large aircraft in front; a B737. I issued caution wake turbulence you're following a B737 X miles ahead Runway 34L cleared to land. I asked him to slow down at some point worried I may not have runway separation. When the small aircraft was about a 3 mile final he asked if he was cleared to land. I issued caution wake turbulence and cleared him to land again the preceding aircraft I believe was off the runway at this point. When the small aircraft was at a safe speed to receive further instruction I told him to turn right at A6 and contact ground 123.77. He responded with 'got beat up pretty bad'. I asked was it turbulence or wind shear? He responded with 'It was turbulence; and it about flipped us'. I don't think I said anything after that. I then reported it to the FLM in charge.

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.

Local controller described a 'wake turbulence' event when a 'small' aircraft following a 'large' aircraft indicated that the encounter 'almost flipped us'.