Iberia Airlines Flight 401 was a routine flight from Madrid International Airport in Spain to Los Rodeos Airport in Tenerife .

The plane was damaged Damaging and could not gain Getting altitude , causing Causation it to crash Catastrophe in the Los Rodeos gorge besides the runway .

On March 27 , 1977 , two Boeing 747 passenger jets , operating Being_in_operation KLM Flight 4805 and Pan Am Flight 1736 , collided on the runway at Los Rodeos Airport ( now Tenerife North Airport ) on the Spanish island of Tenerife .

A terrorist Terrorism incident at Gran Canaria Airport had caused Causation many flights to be diverted Removing to Los Rodeos , including the two aircraft involved Participation in the accident .