NEW : Pilot 's operator : Cause still not known ; investigators should n't jump to conclusions . NTSB : Crew pulled back on control shortly after stall ##ing . A pilot tells investigators that move would have aggravated the accident . Only a few pieces of the Continental Connection Dash 8 turboprop were recognizable after the crash . All 49 aboard , plus one in house , were killed in February crash near Buffalo , New York .
NEW : Pilot 's operator : Cause still not known ; investigators should n't jump to conclusions . NTSB : Crew pulled back on control shortly after stall ##ing . A pilot tells investigators that move would have aggravated the accident . All 49 aboard , plus one in house , were killed in February crash near Buffalo , New York .