A braking system ‘anomaly’ caused an American Airlines jet to exceed a Dallas runway, NTSB says

An American Airlines jetliner that suffered an “anomaly” in the braking system before running past the end of a runway in Texas last month had undergone a brake-replacement job four days earlier, U.S. investigators said Thursday. An inspection showed that flexible hydraulic lines to parts of the braking system on the Boeing 737 had been improperly reconnected, the National Transportation Safety Board said in a preliminary report on the Feb. 10 incident at Dallas-Fort Worth International Airport. The pilots used brake pedals and thrust reversers to slow down, but as the plane neared the end of the runway, the captain of American flight 1632 warned air traffic controllers. The NTSB said that four days before the runway incident, American replaced steel brakes on the main landing gears with carbon brakes and wheel assemblies, based on 2016 instructions from Boeing.