In their first air combat , a small force of seemingly mismatched MiG-17s inflicted Bodily_harm significant losses Earnings_and_losses on much larger and more advanced Cause_to_make_progress American F-105 Thunderchief at a cost Cost of 3 of their own , with an F-100 Super Sabre claiming Statement the first probable American kill Killing of the conflict Hostile_encounter .

On May 1 , 2007 , the National Transportation Safety Board ( NTSB ) stated Statement that the probable cause of the crash Catastrophe was pilot error .

The prosecutors stated Statement that they had probable cause Causation to file criminal charges Judgment_communication against the six police officers who were believed to be involved Cause_to_be_included in his death Death .

Due to the lack of evidence , Irish and Dutch investigators could not pinpoint Placing a probable cause for the accident .

One of the probable causes Causation of stalling due to low speed was attributed Causation to turboprop engines features which change Change the propellers pitch during acceleration .

The NTSB found Know that the probable cause Causation of the accident Catastrophe was the airplane 's departure Departing from normal cruise flight and subsequent impact Influence with the Atlantic Ocean as a result of the relief Cure first officer 's flight control Control inputs .

It stated Statement that the probable cause Causation of the accident was loss Earnings_and_losses of control during an attempted go-around below decision height in instrument meteorological conditions ( IMC ) .

According to the report published Publishing by the Indian investigative team , the probable cause was ruled Legal_rulings as the pilots selecting Choosing the `` Open descent/flight idle ” control mode rather than glideslope capture , allowing Preventing_or_letting the aircraft to sink Motion_directional far below the correct flight path .

The NTSB investigation revealed Reveal_secret evidence of pre-existing metal fatigue , and determined Deciding the probable cause Causation of the incident to be related to an error in the manufacturing Manufacturing process for joining Becoming_a_member fuselage crown skin panels .

The accident Catastrophe was investigated Check by the Canadian Aviation Safety Board ( CASB ) , which determined Deciding the probable cause Causation of the crash Catastrophe was the aircraft 's unexpectedly high drag and reduced lift Motion condition , most likely due Causation to ice contamination on the wings ' leading edges and upper surfaces , as well as underestimated Judgment_communication onboard weight .

The report 's conclusion was that the probable cause Causation of the accident was explosion Attack of flammable fuel vapors in the center fuel tank .

The probable cause Causation of the crash Catastrophe was `` Pilots ' error in initiating Process_start late rotation , and following Motion wrong rotation technique '' and `` failure Earnings_and_losses of the NAA to regulate Control the mobile traffic on the highway during the flight hours '' .

The probable cause Causation was attributed Protest to a fire Catastrophe which originated Coming_to_be in the rear of the cabin .

A mid-route crash Catastrophe on the stratovolcano Chimborazo was considered to be most probable , though some speculated Coming_to_believe a guerrilla hijacking Kidnapping .

The Civil Aeronautics Board determined Deciding that the probable cause Causation of the accident was that the pilot , for undetermined reasons , deviated Change from departure course into an area of rising Cause_change_of_position_on_a_scale terrain , where downdraft activity and turbulence affected Influence the ability of the craft to climb Self_motion .

The probable cause of the crash Catastrophe was determined Deciding to be failure to remove Removing the gust locks that had secured Placing the aircraft 's elevators while it was parked Placing .