02-Jun-14 XZ936 Eurocopter SA341 Boscombe Down, UK

On touchdown the aircraft ‘porpoised’, initially nose down, due to contact with the heels of the skids followed almost immediately by the cyclic being displaced fully aft and a progressive left (lateral) cyclic displacement. The cyclic was then centralised longitudinally as the aircraft pitched up before it was again displaced fully aft, on this occasion for a protracted period, out of phase with the oscillation in pitch attitude. The pitch oscillation continued (albeit to a lesser extent) and whilst full aft cyclic was maintained, the collective was lowered fully causing the disc attitude to be such that the MRB struck the tail. There was a subsequent violent roll of the airframe, before a full cessation of movement; this is assessed to be as a consequence of the impact forces.

Date
June 2, 2014
Reg
XZ936
Make
Eurocopter
Model
SA341
MSN
1743
Location
Boscombe Down
Country
UK
CivilMilitary
Military
Operator
QinetiQ
Link 1
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/396852/20150116-Gazelle_XZ936_SI_-_1.pdf
Link 2
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/332255/XZ936_SI_Interim_Report_OS.pdf
Link 3
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/396854/20150116-Gazelle_XZ936_SI_-_2.pdf

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