Boeing 757s get new parts to fix a valve that keeps failing

The US aviation regulator is ordering new parts for some Boeing 757 airplanes. This fixes a problem where a power transfer unit valve failed to open when it should have.

When a critical part on an airplane fails, it means the manufacturer has to fix it across the entire fleet. This is a routine safety update, but it shows how regulators track specific component failures and force manufacturers to make changes. It means airlines must now schedule maintenance and pay for these specific part replacements.