Bombardier planes must replace a tiny part that makes the nose wheel steer itself

The US aviation regulator wants to force Bombardier to replace a specific part on some of its planes. This part, a setscrew, can fail and cause the nose wheel to steer unexpectedly during landing. This means airlines operating these planes will have to update their maintenance schedules and replace the setscrews, adding a new life limit for the part.

A tiny part can cause a big problem. This proposed rule means that airlines operating specific Bombardier models will have to spend money and time to fix a known safety issue. It also means that the FAA is acting on a specific failure mode that could lead to accidents.