The systems in place at New York’s LaGuardia Airport to prevent ground collisions failed to keep an Air Canada jet from smashing into a fire truck that had just pulled out on the runway as the plane was landing.


The National Transportation Safety Board will determine what went wrong before Sunday’s crash that killed both pilots and injured dozens of others. One of the two air traffic controllers on duty that night cleared the fire truck to cross the runway just 12 seconds before the plane carrying 76 people touched down. His frantic calls moments later for the truck to stop didn’t prevent the collision.


There will almost certainly be multiple factors that contributed to the crash because the aviation system has many layers of precautions in place to help reduce the risks of such an event happening. Investigators are just beginning to interview everyone involved, examine the wreckage and test everything that could have played a role. The mangled plane was being moved to a secure hangar Wednesday for further examination.


LaGuardia is one of 35 major airports nationwide that have Airport Surface Detection Systems known as ASDE-X that combine radar data with information from transponders inside planes and ground vehicles along with other data to create a display in the tower showing controllers where every plane and vehicle is. The system will also sound an alarm in the tower when it anticipates a potential collision.