A taylorcraft nosed over when its brakes took hold after sliding on snow.

Attributes
ACN	291508
Time
Date	199412
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hsi
State Reference	NE
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	ground other : taxi
Person 1
Affiliation	Other
Function	instruction : instructor oversight : pic
Qualification	pilot : commercial pilot : cfi
Experience	flight time last 90 days : 90 flight time total : 600 flight time type : 15
ASRS Report	291508
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility

Narrative:

My student was taxiing back to the ramp (power setting 700 RPM was the rule for taxi operations in order to have a slow and ctlable speed for taxi). We started to WX-vane to the right into the wind. Applied quickly left rudder, but still kept turning to the right (I could have added power to regain rudder effectiveness, but I decided not to due to the taxiway narrowed by hard snow bank -- the tail could have hit the bank if not well controled). I also used the left brake -- no effect, we were on a patch of snow. We finally ended up facing the wind, slowly moving forward and getting closer to the snow bank. I pulled the power to idle (400-500 RPM) as well as back pressure with my elevator control and applied left and right brakes. We nosed over. We concluded that the wheels grasped the concrete after being locked while braking on a patch of snow.

Original NASA ASRS Text

Title: A TAYLORCRAFT NOSED OVER WHEN ITS BRAKES TOOK HOLD AFTER SLIDING ON SNOW.

Narrative: MY STUDENT WAS TAXIING BACK TO THE RAMP (PWR SETTING 700 RPM WAS THE RULE FOR TAXI OPS IN ORDER TO HAVE A SLOW AND CTLABLE SPD FOR TAXI). WE STARTED TO WX-VANE TO THE R INTO THE WIND. APPLIED QUICKLY L RUDDER, BUT STILL KEPT TURNING TO THE R (I COULD HAVE ADDED PWR TO REGAIN RUDDER EFFECTIVENESS, BUT I DECIDED NOT TO DUE TO THE TXWY NARROWED BY HARD SNOW BANK -- THE TAIL COULD HAVE HIT THE BANK IF NOT WELL CTLED). I ALSO USED THE L BRAKE -- NO EFFECT, WE WERE ON A PATCH OF SNOW. WE FINALLY ENDED UP FACING THE WIND, SLOWLY MOVING FORWARD AND GETTING CLOSER TO THE SNOW BANK. I PULLED THE PWR TO IDLE (400-500 RPM) AS WELL AS BACK PRESSURE WITH MY ELEVATOR CTL AND APPLIED L AND R BRAKES. WE NOSED OVER. WE CONCLUDED THAT THE WHEELS GRASPED THE CONCRETE AFTER BEING LOCKED WHILE BRAKING ON A PATCH OF SNOW.

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.