Following a normal three point landing the pilot of a waco biplane was unable to arrest a ground loo...

Attributes
ACN	1197029
Time
Date	201408
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	None
Person 1
Function	Single Pilot
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 10500 Flight Crew Type 50
Events
Anomaly	Ground Event / Encounter Ground Strike - Aircraft Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

I made a normal three point landing in [a conventional landing gear equipped] waco biplane.about half way through the rollout the right wing dropped; followed by a brief instability followed by a drift to the left I could not stop with full right rudder and right brake. The plane continued into the grass and onto a ramp area. As the plane slowed the turn left tightened and at about 15 mph jerked left and spun around 180 degrees dragging the right wing tip. Inspection of the asphalt showed the final ground loop appeared to be the result of the wheel rim digging into the asphalt. The plane came to rest upright with the right shock strut appearing collapsed and the right tube support strut folded accordion style with about four to five folds. The gear leg was folded inward almost vertical. Not sure on performance of the right gear in this event. [It appeared it had been] damaged before but I have not been able to get much information on that. An airport video showed the right wing drop and right rudder against the resulting left drift.

Original NASA ASRS Text

Title: Following a normal three point landing the pilot of a Waco biplane was unable to arrest a ground loop; perhaps the result of some failure of the right landing gear structure; and significant damage to the gear was the result.

Narrative: I made a normal three point landing in [a conventional landing gear equipped] Waco biplane.About half way through the rollout the right wing dropped; followed by a brief instability followed by a drift to the left I could not stop with full right rudder and right brake. The plane continued into the grass and onto a ramp area. As the plane slowed the turn left tightened and at about 15 MPH jerked left and spun around 180 degrees dragging the right wing tip. Inspection of the asphalt showed the final ground loop appeared to be the result of the wheel rim digging into the asphalt. The plane came to rest upright with the right shock strut appearing collapsed and the right tube support strut folded accordion style with about four to five folds. The gear leg was folded inward almost vertical. Not sure on performance of the right gear in this event. [It appeared it had been] damaged before but I have not been able to get much information on that. An airport video showed the right wing drop and right rudder against the resulting left drift.

Data retrieved from NASA's ASRS site 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.

Following a normal three point landing the pilot of a waco biplane was unable to arrest a ground loop; perhaps the result of some failure of the right landing gear structure; and significant damage to the gear was the result.