After a two-decade phase-in period, this week marks full implementation of federal rules requiring new aircraft to incorporate safety features designed to help passengers survive a crash at 16 times the force of gravity. As a result of the regulation, seat belt manufacturer AmSafe has seen growing demand for its $1,200 airbags, currently found in about 1% of seats on commercial airliners. The airbags are credited with saving about 14 lives on general-aviation aircraft, though none has deployed on a commercial flight.

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