Aircraft Systems

Details of the Hydraulic, Engine Control, Electrical, Fire Protection, Flight Control, Air Conditioning and Cabin Pressurization, Ice and Rain Protection, Radio and Auxiliary Power Plant Systems. IN order that high utilization rates and low maintenance costs may be achieved it was necessary to match the fail‐safe, long‐life structure of the HS.748 to trouble‐free systems. The system design philosophy adopted on the Hawker Siddeley 748 was ‘avoid complication and use proven components wherever possible’. This approach together with a layout whereby external access is provided to all systems has produced easy and almost trouble‐free maintenance. The majority of the system components are installed under the cabin floor and are grouped as shown in Fig. 1. Access is through the landing gear doors or four large quick release elliptical access panels enabling all trades to work on the aircraft at the same time.