Some ATR airplanes need new tail parts after a factory used the wrong material

The US aviation regulator is ordering inspections and part replacements for certain ATR airplanes. This is because some vertical tail plane fittings were made with improper materials.

When a factory uses the wrong material for a critical part, it means the entire supply chain for that part is now suspect. This kind of recall is expensive and time-consuming, but it is also a routine part of aviation safety. The system is designed to catch these errors and fix them.