Complete List of Aircraft Heater System Components

Aircraft type should be considered when choosing the aircraft heater system. Different types of heater systems include, fuel fired heaters, exhaust heating systems, combustion heater systems, and bleed air heating systems.

Fuel Fired Heaters

Often small and portable, fuel fired heaters feature combustion chambers where the fuel-air mixture and ignited using an ignition device. The oxygen is provided by a fan attached to the heater system. Because fuel fired heaters are often portable, fuel is piped into the heater system via an external fuel tank or it can be linked up to the aircraft’s fuel system. Warm air is ducted to the cabin using connecting tubing. Maintaining a fuel fired heater is key. By products of the combustion process such as soot, carbon monoxide, and sulfur dioxide are harmful to humans. Routine checks and maintenance must be carried out to ensure that there are no external leakages. The ignition device and tubing are components that should be replaced after a specific amount of time and use. Running fuel fired heaters requires an electrical power source. 12-volt and 24-volt aircraft electrical systems can accommodate a fuel-fired heater.

Exhaust Heating Systems

The exhaust gas created during the engine combustion process is an efficient means of heating the interior of an aircraft. Though exhaust gas is routed out of the engine and into the atmosphere, some of the gas is redirected to the cabin. Interior climate control and the defrosting mechanisms of an aircraft are fueled by exhaust heating systems. Light aircraft often use this heater system as it is the simplest heater system in design and function. Regardless of the aircraft type however, this particular heater system requires strict maintenance to ensure there are no gas leakages. Technicians should have a maintenance schedule that addresses any fire safety concerns.

Combustion Heater Systems

Small aircraft usually use fuel fired heaters whereas larger aircraft use combustion heater systems. Aircraft fuel is ignited in a large combustion chamber, which is surrounded by an outer stainless-steel casing. A unique function of combustion heater systems is the level of control. A control switch either turns on or off the heater system, depending on the aircraft heat requirement.  Air is forced over the combustion chamber and picks up heat. Ducts then funnel the air into the cabin for heating purposes. The safety problems associated with carbon monoxide are considerably lower in a combustion heater system. Because the ventilation air on the outside of the combustion chamber is of higher pressure than the inside of the chamber, any leaking carbon monoxide would likely be carried out by the exhaust system. Once more, combustion heaters have an additional safety feature in the form of an overheat switch. In the case that the engine overheats, the system will shut off the fuel supply.

Bleed Air Heating Systems

In this heating system, air needs to be cooled rather than heated up. Turbine-engine aircraft use this system to make use of the extremely hot air that has been pushed through the compressor. Hot air is mixed with recirculated air in order to cool it. Once the air has reached the correct temperature, it is ducted into the cabin. Due to the nature of the system, there are many safety checks to ensure the compressed, hot air does not enter the cabin.

Part No Description QTY RFQ
04E40-1 blower motor overhaul Avl RFQ
CD20654A cd20654a switch heater control Avl RFQ
CD21157 cd21157 fuel nozzle 1.75 gph Avl RFQ
RA-711222 pass through, fuel gasket Avl RFQ
CD21600 cd21600 heater control switch Avl RFQ
RA-21173 ra-21173 aircraft heater replacement part, fuel nozzle Avl RFQ
CD21166 cd21166 fuel nozzle, 3.00 gph Avl RFQ
CD70145 coupler bulkhead Avl RFQ
RA-477727 gasket, fuel line Avl RFQ
CD70089 gauge Avl RFQ
RA-720141 o-ring Avl RFQ
CD70106 minihelic gauge Avl RFQ
CD70090 magnehelic gauge Avl RFQ
CD21380 cd21380 ignition unit 12vdc Avl RFQ
CD719843 ignition system cd719843 Avl RFQ
CD70220 water manometer inches Avl RFQ
CD21402 permanent magnetic motor, 24 vdc Avl RFQ
CD21399 cd21399 switch, control thermostat linear rheostat, attaches to push-pull cable (low to high) Avl RFQ
CD21295 cd21295 nozzle holder assembly Avl RFQ
CD70035 pdt cap and plugs kit Avl RFQ
17E24 17e24 ignition unit overhauled 24 vdc (long legs) Avl RFQ
CD21163 cd21163 fuel nozzle, 1.35 gph Avl RFQ
RA-700146 isolation mount package of three Avl RFQ
CD21348 cd21348 o-ring Avl RFQ
RA-17D86 gasket Avl RFQ
CD31110 cd31110 blower motor assembly Avl RFQ
CD21252 cd21252 temperature switch Avl RFQ
CD21296 cd21296 fuel nozzle assembly Avl RFQ
CD70081 pdt regulator Avl RFQ
RA-735111 gasket, fuel pump Avl RFQ
CD70121 lamp Avl RFQ
11C30-1M 11c30-1m ignition unit 24 vdc Avl RFQ
CD21385 cd21385 elbow, adapter 90 degree Avl RFQ
CD21176 cd21176 fuel nozzle, 5.50 gph Avl RFQ
CD21384 cd21384 fan four blade Avl RFQ
18E30-1 nozzle holder solenoid assembly overhaul Avl RFQ
RA-57D27 filter, ignition noise reduction Avl RFQ
RA-83D55-1 mixer Avl RFQ
RA-41425 switch, overheat kit Avl RFQ
CD21160 cd21160 fuel nozzle 2.8 gph Avl RFQ
RA-82A52 gasket, nozzle holder Avl RFQ
17E12 17e12 ignition unit overhauled 12 vdc (long legs) Avl RFQ
CD21253 cd21253 thermostat electronic Avl RFQ
CD21518 gasket Avl RFQ
CD31077 cd31077 washer Avl RFQ
CD70144 coupler body Avl RFQ
CD70103 temperature monitor Avl RFQ
CD21168 cd21168 fuel nozzle, 1.20 gph Avl RFQ
CD21185A universal fuel pump, 7.0 psi, 1.25 amp, 12-vdc pass-through Avl RFQ
CD60332 cd60332 washer Avl RFQ
RA-25T64-1-1 package of two carbon brush kit Avl RFQ
RA-07D29 overheat switch - manual reset Avl RFQ
CD21517 1 inch o.d. with .5 inch i.d. gasket Avl RFQ
CD41410 motor mount Avl RFQ
RA-21450-1 brush kit, set of two- .25"x.25" Avl RFQ
RA-21454 spring brush Avl RFQ
CD21340 cd21340 filter assembly Avl RFQ
CD70150 training station for aircraft combustion heaters Avl RFQ
CD21171 cd21171 fuel nozzle, 2.25 gph Avl RFQ
CD70107 regulator Avl RFQ
CD29124 regulator assembly, high pressure Avl RFQ
RA-21452-3 set of 2 carbon brushes- .25" x .25" make up ra-21452-3 brush kit Avl RFQ
CD21505 cd21505 terminal block Avl RFQ
RA-720962 silicone sponge gasket overheat switch Avl RFQ
CD31206 ignitor/ spark plug Avl RFQ
CD22550 combustion air switch Avl RFQ
CD21426 switch, overheat manual reset Avl RFQ
CD70019 supply assembly 2 Avl RFQ
CD21193 cd21193 valve, solenoid 24 vdc normally closed Avl RFQ
RA-41413 mount isolation Avl RFQ
RA-29D28 head gasket Avl RFQ
CD20800 regulator, fuel shutoff Avl RFQ
RA-21455 spring Avl RFQ
RA-45A28 washer Avl RFQ
CD70016 supply assembly-1" Avl RFQ
CD21387 cd21387 ignition mount Avl RFQ
CD70015 supply assembly - 3/4" replaces p201.57 Avl RFQ
CD70200 pdt pressure decay tester kit, new Avl RFQ
CD12C60 cd12c60 vibrator s series heater Avl RFQ
RA-718768-22 o-ring Avl RFQ
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