Primary causes of accidents
| Primary cause | Total | Per cent |
|---|---|---|
| Pilot errors (only) | 205 | 53.5 |
| Mechanical failure (including fuel exhaustion) | 67 | 17.5 |
| Pilot error and weather | 17 | 4.4 |
| Pilot error and mechanical failure | 17 | 4.4 |
| Weather (gust, thermal, rain, wind increase, etc) | 22 | 5.7 |
| Not applicable/unknown | 24 | 4.4 |
| Other* | 31 | 1.8 |
*Including takeoff disturbed by wake turbulence created by the passage of other aircraft and landing out of the landing zone (LZ).