There were no injuries to the passengers or crew, however the Air Accidents Investigation Branch made seven safety recommendations in the final accident report.
However, the Air Accidents Investigation Branch found these repairs by welding were unsatisfactory in ensuring safe operation.
The Air Accidents Investigation Branch could find no cause for the crash.
Data from the accident 'black box' recovered from the destroyed helicopter has been played back satisfactorily, according to the Air Accidents Investigation Branch.
These accidents have been recorded by the Air Accidents Investigation Branch and are listed below.
The incident was investigated by the Air Accidents Investigation Branch, which made four safety recommendations.
The crash is being investigated by the Air Accidents Investigation Branch and Northamptonshire Police.
An investigation has been launched by the Air Accidents Investigation Branch.
It is also home to the Air Accidents Investigation Branch, part of the Department for Transport.
With the cause of the incident uncertain, three separate enquiries were undertaken, including one by the Air Accidents Investigation Branch.
