 In 1994 Raisbeck introduced the aft fuselage locker for Learjet 35/36 aircraft, which allows the carriage of up to 11 cubic feet (0.31 m3) and 300 lb (136 kg) of cargo with easy external access to the watertight locker.The locker was also later certified for use on the Learjet 31.Turning to airliners, in 1996 the Raisbeck Commercial Air Group completed recertification of the Boeing 727 to meet Stage 3 noise limits without weight and performance penalties.