BURKHART GROB G-103A TWIN II ACRO
Warner Springs, CA — November 26, 2010
Event Information
| Date | November 26, 2010 |
| Event Type | ACC |
| NTSB Number | WPR11CA060 |
| Event ID | 20101129X31403 |
| Location | Warner Springs, CA |
| Country | USA |
| Coordinates | 33.28444, -116.67472 |
| Airport | Warner Springs Gliderport |
| Highest Injury | NONE |
Aircraft
| Make | BURKHART GROB |
| Model | G-103A TWIN II ACRO |
| Category | GLI |
| FAR Part | 091 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 2 |
| Total Injured | 0 |
Event Location
Probable Cause
The certified flight instructor's inadequate compensation for the crosswind and delayed remedial action during landing, which resulted in a ground loop.
Full Narrative
The certified flight instructor (CFI) was providing instruction to a student pilot in a glider. After a routine local instructional flight, they returned to the departure airport for landing. They flew a standard traffic pattern to runway 08R (dirt glider landing area) and the wind was from approximately 100 degrees at 12 knots, gusting to about 20 knots. The student was flying the glider, and the CFI was providing verbal instructions to him. The glider encountered a high sink rate, the CFI took the controls, and the glider ground looped. Post accident examination showed that the tail boom was fractured.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.