C-150 training flight has wake turbulence encounter, loss of aircraft control, hard landing.

Attributes
ACN	301449
Time
Date	199007
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ryn
State Reference	AZ
Altitude	agl bound lower : 0 agl bound upper : 20
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ryn
Operator	general aviation : instructional
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	VFR
Aircraft 2
Make Model Name	Helicopter
Operating Under FAR Part	other : unknown
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 8 flight time total : 478 flight time type : 8
ASRS Report	301449
Person 2
Affiliation	Other
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	inflight encounter other other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : took evasive action other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

I took off from ryan field and flew to sells air strip where I made 1 landing. Returned to ryan field for 1 touch- and-go and 1 full stop landing, which turned out to be 2 touch-and-go and 1 full stop. Non federal control tower controller cleared me for landing behind a helicopter which was making practice lndgs on the runway. The helicopter had lifted off moments before I was to make my touchdown when I experienced what I didn't know at the time was wake turbulence. The little C-150 I had rented came down hard on the runway, bounced up in a high angle of attack with full flaps, low RPM and to the left of the runway. The left wheel struck and broke a runway light. I immediately applied full power and somehow managed to regain control and proceed into the air and into the traffic pattern to make a full stop landing. There was no damage to the airplane and the renter didn't make an issue of the incident. All was forgotten. Total pilot time at the time of the incident: 343.9 hours.

Original NASA ASRS Text

Title: C-150 TRAINING FLT HAS WAKE TURB ENCOUNTER, LOSS OF ACFT CTL, HARD LNDG.

Narrative: I TOOK OFF FROM RYAN FIELD AND FLEW TO SELLS AIR STRIP WHERE I MADE 1 LNDG. RETURNED TO RYAN FIELD FOR 1 TOUCH- AND-GO AND 1 FULL STOP LNDG, WHICH TURNED OUT TO BE 2 TOUCH-AND-GO AND 1 FULL STOP. NON FEDERAL CTL TWR CTLR CLRED ME FOR LNDG BEHIND A HELI WHICH WAS MAKING PRACTICE LNDGS ON THE RWY. THE HELI HAD LIFTED OFF MOMENTS BEFORE I WAS TO MAKE MY TOUCHDOWN WHEN I EXPERIENCED WHAT I DIDN'T KNOW AT THE TIME WAS WAKE TURB. THE LITTLE C-150 I HAD RENTED CAME DOWN HARD ON THE RWY, BOUNCED UP IN A HIGH ANGLE OF ATTACK WITH FULL FLAPS, LOW RPM AND TO THE L OF THE RWY. THE L WHEEL STRUCK AND BROKE A RWY LIGHT. I IMMEDIATELY APPLIED FULL PWR AND SOMEHOW MANAGED TO REGAIN CTL AND PROCEED INTO THE AIR AND INTO THE TFC PATTERN TO MAKE A FULL STOP LNDG. THERE WAS NO DAMAGE TO THE AIRPLANE AND THE RENTER DIDN'T MAKE AN ISSUE OF THE INCIDENT. ALL WAS FORGOTTEN. TOTAL PLT TIME AT THE TIME OF THE INCIDENT: 343.9 HRS.

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.