24-Electric
Power
26-Fire Protection
28-Fuel
37-Vacuum
54-Engine Mount
61-Propellor
71-Powerplant
72-Engine
73-Fuel &
Control
74-Ignition
75-Air
76-Control
77-Indicating
78-Exhaust
78-10
Manifold
78-20 Muffler
78-30
Turbo general
78-31 Waste gate
79-Engine
Oil
80-Starting
83-Gearbox