On September 12 , 1980 , Florida Commuter Airlines flight 65 crashed en route to Freeport , Bahamas killing all 34 passengers and crew . The cause was determined to be due in part to a malfunctioning air speed indicator caused by mud dauber nests that were improperly cleared from the aircraft 's pitot tubes , a component which measures outside air pressure through small tubes on the outside of the aircraft and displays this as the plane 's speed
Florida Commuter Airlines flight 65
Florida Commuter Airlines crash
Mud dauber