Commercial aircraft manufacturers and airlines have to take new steps to protecting thousands of jets from severe structural fatigue as they age, according to a rule finalized on Friday by U.S. aviation regulators.

The FAA is mandating manufacturers, like industry leaders Boeing Co and Airbus, a unit of Europe’s EADS and airlines to strengthen and modernize inspections of the metallic skeleton and skin of the aircrafts.

The FAA predicts fulfillment costs for the industry to be $3.6 million.

Source: Reuters