On June 19, 2011, at 1420 universal coordinated time (UTC), a McDonnell Douglas Helicopter Company model 369E, United Kingdom registration G-KSWI, s/n 0204E, was substantially damaged during an emergency landing after experiencing a mechanical failure of the tail-rotor control system near Glastonbury, United Kingdom. The helicopter was substantially damaged and the pilot was seriously injured during the accident. The investigation is under the jurisdiction of the United Kingdom Government. Further information may be obtained from: Department for Transport Air Accident Investigation Branch (AAIB) Farnborough House Berkshire Copse Road Aldershot, Hampshire GU11 2HH, United Kingdom Phone: +44 (0) 1252 510300 Fax: +44 (0) 1252 376999 E-mail: investigations@aaib.gov.uk Webpage: http://www.aaib.gov.uk This report is for informational purposes only and contains only information released by or obtained from the Air Accident Investigation Branch (AAIB).