Regulacje i polityka gospodarcza · 22/11/1996

Airworthiness Directives; Boeing Model 747-400 ``Combi'' Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing 747-400 series airplanes in the ``combi'' configuration. This action requires replacing the decompression panels that are located in the smoke barrier between the passenger and main deck cargo compartment, with new panels of an improved design. This amendment is prompted by reports indicating that normal pressurization cycles are causing premature tearing or opening of these decompression panels. The actions specified in this AD are intended to prevent increased airflow in the cargo compartment caused by the tearing or opening of these panels; this condition, if not corrected, could result in delayed fire detection and reduced effectiveness of the cargo compartment fire suppression system.