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
77-10 Tachometer
77-20 O2 Sensor
77-30 Coolant Temp
77-31 Coolant Pressure
77-40 Crank Angle Sx
78-Exhaust
79-Engine
Oil
80-Starting
83-Gearbox