NEW : Plane 's operator : Cause still not known ; public should n't jump to conclusions . NTSB : Crew pulled back on control column after stall warning . Comment: ` By pulling it up without adding power , you 're aggravating the situation . '' All 49 aboard , plus 1 in house , were killed in February crash near Buffalo , New York .
NEW : Plane 's operator : Cause still not known ; public should n't jump to conclusions . NTSB : Crew pulled back on control column after stall warning . Comment: All 49 aboard , plus 1 in house , were killed in February crash near Buffalo , New York .