73-00 Engine Fuel and Control
73-10 Fuel Distribution
73-20 Fuel Control
74-00 Ignition
74-10 Ignition
74-20 Ignition Cables
75-00 Air
75-30 Compressor Bleed Valve
76-00 Engine Controls
76-10 Propeller Reversing Linkage
77-20 Engine Indicating
79-00 Oil
79-20 Oil Distribution