▁some ▁of ▁its ▁statements ▁regarding ▁the ▁controller ' s ▁part ▁in ▁the ▁crash , ▁saying ▁that ▁the ▁controller ▁could ▁not ▁have ▁war ned ▁the ▁plane ▁about ▁the ▁tour ▁hel ic opter ▁because ▁the ▁tour ▁hel ic opter ▁was ▁not ▁on ▁the ▁controller ' s ▁rad ar . ▁The ▁N T SB ▁also ▁removed ▁NAT CA ▁as ▁a ▁party ▁to ▁the ▁investigation ▁as ▁a ▁result ▁of ▁NAT CA ' s ▁press ▁release , ▁as ▁parties ▁to ▁N T SB ▁investig ations ▁agree ▁to ▁let ▁the ▁N T SB ▁control ▁public ity ▁during ▁the ▁investigation . ▁NAT CA ▁may ▁still ▁submit ▁information ▁to ▁the ▁board ▁regarding ▁the ▁accident , ▁but ▁they ▁will ▁not ▁hold ▁a ▁seat ▁on ▁the ▁investigation ▁board . ▁ ▁Due ▁to ▁the ▁accident , ▁the ▁F AA ▁put ▁the ▁T eter bor o ▁controller ▁and ▁his ▁super visor ▁on ▁leave ▁and ▁made ▁comments ▁about ▁the ▁phone ▁call , ▁which ▁was ▁de emed ▁impro per ▁behavior . ▁However , ▁the ▁N T SB ▁re bu ked ▁the ▁F AA ▁for ▁doing ▁so , ▁stating ▁that ▁only ▁the ▁N T SB ▁has ▁the ▁authority ▁to ▁determine ▁the ▁controller ' s ▁contribution ▁to ▁the ▁incident . ▁ ▁On ▁September ▁ 1 4 , ▁ 2 0 1 0 , ▁the ▁N T SB ▁released ▁its ▁final ▁report ▁on ▁the ▁incident . ▁The ▁report ▁c ited ▁two ▁primary ▁causes ▁of ▁the ▁accident : ▁( 1 ) ▁the ▁" in her ent ▁limitations " ▁of ▁the ▁see - and - av oid ▁concept , ▁which ▁meant ▁that