The Boeing Company Proposes New Airworthiness Directive for 747-400 and 747-400D Series Airplanes

Summary

The Boeing Company is proposing a new airworthiness directive to require the installation of aluminum gutter reinforcing brackets and a reinforcing fiberglass overcoat on certain Model 747-400 and 747-400D series airplanes to prevent water penetration into the main equipment center, which could lead to loss of flight critical systems.