Boeing 787s might have the wrong metal in their seat tracks
What happened
US aviation regulators are proposing new inspections for certain Boeing 787 airplanes. This is because some seat track parts might have been made with the wrong type of titanium.
Why it matters
Aviation safety relies on every part being exactly what it's supposed to be. When a supplier uses the wrong material, it creates an unknown risk that regulators must track down across thousands of planes. This kind of issue can lead to expensive, fleet-wide inspections and repairs for airlines.
The signal
Watch for how many planes are found with incorrect parts and how quickly Boeing and airlines can replace them.