An small aircraft single experienced wake turbulence behind an small aircraft twin.

Attributes
ACN	312717
Time
Date	199505
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ocf
State Reference	FL
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	PA-23 Apache (& Geronimo Apache)
Operating Under FAR Part	other : unknown
Flight Phase	descent : approach landing other
Person 1
Affiliation	Other
Function	flight crew : single pilot instruction : instructor
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 850 flight time type : 600
ASRS Report	312717
Person 2
Affiliation	Other
Function	flight crew : single pilot instruction : trainee
Qualification	pilot : student
Events
Anomaly	inflight encounter other other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

My student entered the pattern and made the appropriate radio call, immediately after a light twin called 3 mi final for runway 36, low approach only. We proceeded around the pattern to a point of turning final. We slowed to 60 KTS and started our descent. The apache was about a mi ahead of us, starting the missed approach. When we passed through the MDA for the approach, the aircraft rolled hard into a 40 degree left bank. I took the airplane from the student (who had applied no corrective control inputs), righted the aircraft and landed normally. I had encountered wake turbulence before at other airports, from bigger aircraft. I underestimated the wake from the apache. I suppose when you fly a C152 you should not underestimate the wake from anything.

Original NASA ASRS Text

Title: AN SMA SINGLE EXPERIENCED WAKE TURB BEHIND AN SMA TWIN.

Narrative: MY STUDENT ENTERED THE PATTERN AND MADE THE APPROPRIATE RADIO CALL, IMMEDIATELY AFTER A LIGHT TWIN CALLED 3 MI FINAL FOR RWY 36, LOW APCH ONLY. WE PROCEEDED AROUND THE PATTERN TO A POINT OF TURNING FINAL. WE SLOWED TO 60 KTS AND STARTED OUR DSCNT. THE APACHE WAS ABOUT A MI AHEAD OF US, STARTING THE MISSED APCH. WHEN WE PASSED THROUGH THE MDA FOR THE APCH, THE ACFT ROLLED HARD INTO A 40 DEG L BANK. I TOOK THE AIRPLANE FROM THE STUDENT (WHO HAD APPLIED NO CORRECTIVE CTL INPUTS), RIGHTED THE ACFT AND LANDED NORMALLY. I HAD ENCOUNTERED WAKE TURB BEFORE AT OTHER ARPTS, FROM BIGGER ACFT. I UNDERESTIMATED THE WAKE FROM THE APACHE. I SUPPOSE WHEN YOU FLY A C152 YOU SHOULD NOT UNDERESTIMATE THE WAKE FROM ANYTHING.

Data retrieved from NASA's ASRS site as of July 2007 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.