In the period 09 Jan 1997 to 15 May 2008 there were 366 accidents to UK Registered rotary wing aircraft. At least 10 of these accidents are still under investigation.
Included in this group where a number of gyrocopters, which where subsequently excluded from the study. Included are Search and Rescue aircraft and any involved in offshore support, however it was felt that these are exposed to a different set of risks due to the environment they operate in, as such they will be excluded from the statistics generated later on.

This involved 348 helicopters.

Robinson Helicopter Corporation were the manufacturer with the highest number of accidents occuring to their helicopters, being involved in 133.

The R22 was the helicopter type involved in most helicopter accidents during the period, being involved in 94.

The B206 was the helicopter type involved in the highest number of fatal helicopter accidents, being involved in 7.

1998 was the year with the highest number of helicopter accidents there being 40 accidents occuring that year.
2008 was the year with the least number of helicopter accidents there being 12 accidents occuring that year.

Fatal Accidents
Fatal Accidents were studied in more detail than non fatal accidents. Additional data was collated related to aircraft commanders experience and fatalities caused.

There were 35 fatal accidents that resulted in 100 fatalities.

The least experienced commander of an aircraft involved in a fatal accident had a total of 58 hours, the most experienced commander had a total of 15314 hours.