Airworthiness Directive · Amendment 39-15300 · Boeing Model 747-400 and 747-400D Series Airplanes
Boeing Model 747-400 and 747-400D Series Airplanes
This AD applies to Boeing Model 747-400 and 747-400D series airplanes, certificated in any category; as identified in Boeing Special Attention Service Bulletin 747-53-2498, dated December 19, 2006.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-400 and 747-400D series airplanes. For certain airplanes, this AD requires modifying the stowage bin ladder of zone E, installing new intercostals, removing existing tie rods, and installing new tie rods. For certain other airplanes, this AD requires modifying the lateral shear beam. This AD results from a report indicating that the overhead lateral shear beam aft of main entry door number 5 reacts to certain loads from the weight of the center stowage bins of zone E and additional loads. We are issuing this AD to prevent detachment of the center stowage bins of zone E at forward load levels less than 9g during an emergency landing, which could cause injury to passengers and/or crew and could impede subsequent rapid evacuation.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 36 months after the effective date of this AD, do the applicable actions required by paragraphs (f)(1) and (f)(2) of this AD by doing all the actions in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-53-2498, dated December 19, 2006.
(1) For Group 1 airplanes, as identified in the service bulletin: Modify the stowage bin ladder of zone E, install new right and left intercostals, and remove existing tie rods and install new tie rods.
(2) For Group 2 airplanes, as identified in the service bulletin: Modify the lateral shear beam.
