24-Electric
Power
26-Fire
Protection
28-Fuel
37-Vacuum
54-Engine
Mount
61-Propellor
61-10 Prop
71-Powerplant
72-Engine
73-Fuel
& Control
74-Ignition
75-Air
76-Control
77-Indicating
78-Exhaust
79-Engine
Oil
80-Starting
83-Gearbox