A high wing tail dragger performed a ground loop when the trainee loses control. The instructor pilot cannot regain control of the aircraft which loses the right gear during the event.

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Attributes
ACN	432070
Time
Date	199903
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mmv.airport
State Reference	OR
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 120 flight time total : 8000 flight time type : 75
ASRS Report	432070
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On landing rollout from wheel landing, the PF swerved right and corrected too far. When it became obvious that he was unable to stop the swerve to the left, I tried to apply rudder and brake but was too late. The right wingtip contacted the runway and the right landing gear collapsed. A smaller correction a bit sooner from the initial swerve or intervention from me (an instructor) could have prevented the gndloop.

Original NASA ASRS Text

Title: A HIGH WING TAIL DRAGGER PERFORMED A GND LOOP WHEN THE TRAINEE LOSES CTL. THE INSTRUCTOR PLT CANNOT REGAIN CTL OF THE ACFT WHICH LOSES THE R GEAR DURING THE EVENT.

Narrative: ON LNDG ROLLOUT FROM WHEEL LNDG, THE PF SWERVED R AND CORRECTED TOO FAR. WHEN IT BECAME OBVIOUS THAT HE WAS UNABLE TO STOP THE SWERVE TO THE L, I TRIED TO APPLY RUDDER AND BRAKE BUT WAS TOO LATE. THE R WINGTIP CONTACTED THE RWY AND THE R LNDG GEAR COLLAPSED. A SMALLER CORRECTION A BIT SOONER FROM THE INITIAL SWERVE OR INTERVENTION FROM ME (AN INSTRUCTOR) COULD HAVE PREVENTED THE GNDLOOP.

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.