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
CD21295 cd21295 nozzle holder assembly Avl RFQ
CD70013 expansion bulb 2-1/4" Avl RFQ
CD21401 long life, 12 vdc motor better by design Avl RFQ
CD21250 cd21250 universal lead kit Avl RFQ
CD20639 cd20639 fan wheel Avl RFQ
CD21412 single row ball bearings, package of two Avl RFQ
RA-704883 o-ring Avl RFQ
CD65C65 cd65c65 coil, ignition Avl RFQ
RA-41411 bumper, isolation Avl RFQ
CD21155 cd21155 fuel nozzle 2.08 gph Avl RFQ
CD31110 cd31110 blower motor assembly Avl RFQ
CD21068 cd21068 gasket rope kit Avl RFQ
CD21520 mount, isolation Avl RFQ
285CAL pdt calibration Avl RFQ
CD21186 cd21186 fuel pump universal Avl RFQ
RA-700146 isolation mount package of three Avl RFQ
51A05 serviceable janitrol 51a05 Avl RFQ
CD31206 ignitor/ spark plug Avl RFQ
CD21153 fuel nozzle Avl RFQ
CD31078 washer, ground electrode cd31078 is faa approved to directly replace janitrol a56a14 Avl RFQ
CD09D77 cd09d77 nozzle holder gasket Avl RFQ
CD21518 gasket Avl RFQ
CD70017 supply assembly 1-1/2" Avl RFQ
CD21285 cd21285 fuel nozzle holder assy. Avl RFQ
CD70084 pdt temperature probe Avl RFQ
CD70145 coupler bulkhead Avl RFQ
CD21501 number plate Avl RFQ
RA-719842 lead ignition Avl RFQ
RA-14D29 ra-14d29 gasket, overheat switch Avl RFQ
CD31207 replacement part spark plug Avl RFQ
CD21380 cd21380 ignition unit 12vdc Avl RFQ
RA-A55D91 gasket, nozzle holder (s-series) Avl RFQ
CD21192 cd21192 valve, solenoid Avl RFQ
CD21384 cd21384 fan four blade Avl RFQ
19E24 19e24 ignition unit 24 vdc overhaul Avl RFQ
RA-21452-3 set of 2 carbon brushes- .25" x .25" make up ra-21452-3 brush kit Avl RFQ
11E31-1 11e31-1 motor overhaul 24 vdc Avl RFQ
CD70144 coupler body Avl RFQ
CD21255 cd21255 replaces push-pull cable Avl RFQ
11C30-1M 11c30-1m ignition unit 24 vdc Avl RFQ
CD21417 exhaust shroud gasket Avl RFQ
CD41210 number plate cd41210 Avl RFQ
CD21502 cd21502 number plate Avl RFQ
753803 dynamic motor 24 vdc overhaul Avl RFQ
CD70090 magnehelic gauge Avl RFQ
RA-35D89 gasket Avl RFQ
RA-83D55-1 mixer Avl RFQ
CD21516 1 inch od .47 inch id gasket Avl RFQ
CD21190 cd21190 pump/ motor universal. Avl RFQ
CD70104 gauge high pressure Avl RFQ
RA-720963 sponge, silicone gasket Avl RFQ
CD21166 cd21166 fuel nozzle, 3.00 gph Avl RFQ
CD21196 cd21196 fuel pump universal Avl RFQ
CD70049 gauge, lower bottom connection Avl RFQ
RA-21455 spring Avl RFQ
CD21385 cd21385 elbow, adapter 90 degree Avl RFQ
CD70113 fitting 1/8" Avl RFQ
13D61 13d61 serviceable nozzle holder assembly Avl RFQ
RA-41401 fuel, drive pump double shaft 24 vdc Avl RFQ
CD20800 regulator, fuel shutoff Avl RFQ
CD31111 spark plug approved by faa as direct replacement for janitrol 54a35 Avl RFQ
RA-488478 plunger, assembly Avl RFQ
CD70091 regulator low pressure Avl RFQ
CD719843 ignition system cd719843 Avl RFQ
RA-D02C12 ra-d02c12 spark plug Avl RFQ
CD21381 cd21381 ignition unit Avl RFQ
CD21346 cd21346 filter replacement kit needed 250 hours or 2 years after cd21340 installed Avl RFQ
RA-41405 brush, permanent Avl RFQ
CD31073 electrode is faa approved to directly replace janitrol 51a05 Avl RFQ
RA-41425 switch, overheat kit Avl RFQ
CD21517 1 inch o.d. with .5 inch i.d. gasket Avl RFQ
CD21161 cd21161 fuel nozzle .65 gph Avl RFQ
CD21442 switch overheat manual reset, 225 degree Avl RFQ
RA-88D88-1 gasket Avl RFQ
CD70011 pdt expansion bulb 1-1/8" Avl RFQ
CD29111 fuel pump assy Avl RFQ
CD20801 24vdc regulator Avl RFQ
CD21176 cd21176 fuel nozzle, 5.50 gph Avl RFQ
CD12C60 cd12c60 vibrator s series heater Avl RFQ
CD21185 cd21185 fuel pump universal Avl RFQ
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