Special Conditions: Boeing Model 747 Series Airplanes; Overhead Crew Rest Area

These amended special conditions are issued to the Boeing Commercial Airplane Company for the Model 747 series airplanes. This airplane has a novel or unusual design feature associated with the overhead crew rest area. Special Conditions No. 25-ANM-16 were issued on November 13, 1987, addressing this installation. On January 23, 1997, Boeing applied for a type design change which proposes to add an additional feature; the installation of curtains or partitions in the crew rest area. Since the applicable airworthiness regulations, including those contained in Special Conditions No. 25-ANM-16, do not contain adequate or appropriate safety standards for this particular design feature, these amended special conditions contain the additional safety standards which the Administrator finds necessary to establish a level of safety equivalent to that established by the airworthiness standards for transport category airplanes.