The pilots failed Agree_or_refuse_to_act to switch Change_tool on the engines ' internal ice protection systems , used Using reverse thrust in a snowstorm prior to takeoff Self_motion , tried to use Using the jet exhaust of a plane in front of them to melt their ice , and failed Earnings_and_losses to abort Process_end the takeoff Motion even after detecting Check a power problem while taxiing and seeing Perception_active ice and snow buildup Cause_change_of_position_on_a_scale on the wings .

This aircraft , another Electra , had disintegrated Change in mid-air after losing Earnings_and_losses its wings in a similar fashion to the Braniff aircraft .

The investigation Criminal_investigation into the Northwest crash Catastrophe discovered Know a new phenomenon of harmonic coupling Cause_to_amalgamate within the wings of aircraft , which in the end Process_end was ultimately identified Check by the CAB as being the cause Causation of both break-ups .

Both wings were then subjected to extreme downloads .

However that Constitution was short-lived , as in 1937 , amidst growing Expansion extremism on the left Departing and right wings of the political spectrum , Vargas closed Process_end the National Congress and enacted Creating another Constitution , which established Building an authoritarian regime called Name_conferral Estado Novo .

The investigation of the disaster , which was assisted Assistance by the Dutch investigation team , concluded Coming_to_believe that the cause of the accident was due to the accumulation of ice on the wings of the aircraft .

A similar accident had happened Presence three years before in 1989 , when Air Ontario Flight 1363 crashed Catastrophe shortly after takeoff at Dryden Regional Airport after ice had accumulated Come_together on the wings and airframe .

The subsequent investigation revealed Reveal_secret that due to pilot error , inadequate de-icing procedures at LaGuardia , and several lengthy delays , a large amount of ice had accumulated Come_together on the wings and airframe .

This left a hole in the Parliamentarian line , dividing the army into two wings through which the Royalists hoped to pass Motion_directional , splitting Destroying the Parliamentarians and allowing Preventing_or_letting Charles 's troops to encircle Besieging and defeat Conquering the enemy .

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 .

This caused Causation the nose wheels to dig in and the aircraft to overturn Self_motion , losing Earnings_and_losses both wings and the starboard tailplane in the process .

An investigation Criminal_investigation by West German airport authorities originally blamed Judgment_communication Thain , saying Statement he did not de-ice the aircraft 's wings , despite eyewitness statements Statement to the contrary .

Both aircraft lost Earnings_and_losses their right wings and tails , went out of control Control and crashed Catastrophe about one or two minutes later near the village of Zolochiv , Ukrainian SSR , Soviet Union , killing Killing all 94 people on both aircraft .