▁removed ▁to ▁F arn borough ▁for ▁further ▁for ens ic ▁investigation . ▁A ▁report ▁into ▁the ▁accident ▁was ▁published ▁on ▁ 1 2 ▁February ▁ 2 0 0 9 . ▁In ▁it , ▁the ▁AA IB ▁did ▁not ▁reach ▁a ▁definite ▁conclusion ▁as ▁to ▁the ▁cause ▁of ▁the ▁accident , ▁stating ▁instead ▁that ▁" the ▁hel ic opter ▁crash ed ▁in ▁a ▁wood ed ▁valley ▁while ▁man oe u ver ing ▁at ▁high ▁speed ▁and ▁low ▁height . ▁It ▁was ▁int act ▁prior ▁to ▁impact , ▁and ▁the ▁available ▁evidence ▁indicated ▁that ▁the ▁engine ▁was ▁deliver ing ▁power . ▁The ▁cause ▁of ▁the ▁accident ▁was ▁not ▁posit ively ▁determined . ▁Although ▁no ▁technical ▁reason ▁was ▁found ▁to ▁explain ▁the ▁accident , ▁a ▁technical ▁fault ▁could ▁not ▁be ▁ruled ▁out ▁entirely . ▁However , ▁it ▁is ▁more ▁likely ▁that ▁the ▁pilot ▁attempted ▁a ▁turning ▁man oe uv re ▁at ▁low ▁height , ▁during ▁which ▁the ▁hel ic opter ▁devi ated ▁from ▁its ▁intended ▁flight ▁path ; ▁whether ▁due ▁to ▁the ▁pilot ▁encounter ing ▁handling ▁difficulties , ▁mis jud g ement , ▁spatial ▁dis orientation , ▁dist raction ▁or ▁a ▁combination ▁of ▁such ▁events . ▁There ▁were ▁indic ations ▁that ▁the ▁pilot ▁had ▁started ▁a ▁recovery ▁but , ▁with ▁ins u fficient ▁height ▁in ▁which ▁to ▁complete ▁it , ▁the ▁hel ic opter ▁struck ▁trees ▁in ▁the ▁valley ▁and ▁crash ed , ▁killing ▁all ▁four ▁occup ants ." ▁ ▁A ▁fatal ▁accident ▁inqu iry ▁into ▁the ▁incident ▁concluded , ▁on ▁ 6 ▁September ▁ 2