Airworthiness Directive · Amendment 39-13593 · Boeing Model 747 -400 and -400D Series Airplanes
Boeing Model 747 -400 and -400D Series Airplanes
Model 747-400 and -400D series airplanes, identified as Group 2 airplanes in Boeing Special Attention Service Bulletin 747-25-3111, Revision 2, dated April 24, 2003; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 and 400D series airplanes. This action requires installation of tie bars on the rails of the center passenger service units (PSU) panel in Zone A. This action is necessary to prevent PSU panels from moving and falling from the PSU support rails during takeoff and landing, which could result in injury to passengers and could impede evacuation of the passengers in an emergency situation. This action is intended to address the identified unsafe condition.
