Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 737, 747, and 777 series airplanes. This proposal would require replacement of the seat track fittings on all passenger seats with new, improved fittings. This action is necessary to prevent unrestrained movement of the passenger seats during high forward deceleration of the airplane, which could result in injury to the passengers or crew members during an emergency landing. This action is intended to address the identified unsafe condition.