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
RA-87A37 gasket, fuel fitting Avl RFQ
CD70019 supply assembly 2 Avl RFQ
CD21296 cd21296 fuel nozzle assembly Avl RFQ
CD22550 combustion air switch Avl RFQ
CD21186 cd21186 fuel pump universal Avl RFQ
PDTCALIBRATION pdt calibration annual calibration of your test unit Avl RFQ
RA-700146 isolation mount package of three Avl RFQ
RA-D02C12 ra-d02c12 spark plug Avl RFQ
CD70145 coupler bulkhead Avl RFQ
RA-14E00-1 serviceable vibrator Avl RFQ
10D48 10d48 servicable vibrator Avl RFQ
CD29127 cd29127 fuel train Avl RFQ
CD21348 cd21348 o-ring Avl RFQ
CD21417 exhaust shroud gasket Avl RFQ
CD21379 cd21379 shock mount- package of three Avl RFQ
CD21330 cd21330 kit, lead repair Avl RFQ
CD09D77 cd09d77 nozzle holder gasket Avl RFQ
CD70106 minihelic gauge Avl RFQ
RA-704983 kit, nozzle and solenoid service Avl RFQ
RA-474669 gasket Avl RFQ
CD21600 cd21600 heater control switch Avl RFQ
RA-704883 o-ring Avl RFQ
RA-720012 washer Avl RFQ
CD70011 pdt expansion bulb 1-1/8" Avl RFQ
CD70300 adaptable test stand Avl RFQ
13D61 13d61 serviceable nozzle holder assembly Avl RFQ
CD70113 fitting 1/8" Avl RFQ
07D97 ignition unit overhaul 24 vdc Avl RFQ
CD21164 cd21164 fuel nozzle, 1.0 gph Avl RFQ
CD21168 cd21168 fuel nozzle, 1.20 gph Avl RFQ
RA-41401 fuel, drive pump double shaft 24 vdc Avl RFQ
CD21518 gasket Avl RFQ
CD70017 supply assembly 1-1/2" Avl RFQ
RA-720965 exhaust shroud gasket silicone sponge Avl RFQ
CD70012 expansion bulb 1-9/16" Avl RFQ
CD29112 fuel pump assy. 12 vdc Avl RFQ
753803 dynamic motor 24 vdc overhaul Avl RFQ
CD70090 magnehelic gauge Avl RFQ
18E30-1 nozzle holder solenoid assembly overhaul Avl RFQ
CD70219 water manometer holder Avl RFQ
CD21154 cd21154 fuel nozzle 1.35 gph Avl RFQ
CD21562 fuel shutoff assembly Avl RFQ
CD70104 gauge high pressure Avl RFQ
RA-57D27 filter, ignition noise reduction Avl RFQ
RA-476229 ra-476229 gasket, washer Avl RFQ
CD21155 cd21155 fuel nozzle 2.08 gph Avl RFQ
RA-720962 silicone sponge gasket overheat switch Avl RFQ
CD21380 cd21380 ignition unit 12vdc Avl RFQ
CD21184A cd21184a fuel pump universal Avl RFQ
CD31077 cd31077 washer Avl RFQ
CD21159 cd21159 fuel nozzle .50 gph Avl RFQ
CD22030 cd22030 spark plug assembly Avl RFQ
CD70018 pdt supply Avl RFQ
RA-715167 copper gasket Avl RFQ
CD41210 number plate cd41210 Avl RFQ
RA-52A02 gasket, head Avl RFQ
CD21184 cd21184 fuel pump universal Avl RFQ
CD21401 long life, 12 vdc motor better by design Avl RFQ
RA-88D88-1 gasket Avl RFQ
RA-41411 bumper, isolation Avl RFQ
CD20639 cd20639 fan wheel Avl RFQ
CD21166 cd21166 fuel nozzle, 3.00 gph Avl RFQ
CD30500 fan, 4 blade mini Avl RFQ
CD474363 burner gasket Avl RFQ
11C30-1M 11c30-1m ignition unit 24 vdc Avl RFQ
CD70082 gauge Avl RFQ
RA-17D86 gasket Avl RFQ
CD21157 cd21157 fuel nozzle 1.75 gph Avl RFQ
CD21169 cd21169 fuel nozzle, 1.65 gph Avl RFQ
CD70144 coupler body Avl RFQ
CD70100 self-contained c&d associates pressure decay tester  Avl RFQ
CD22040 spark plug Avl RFQ
41C74 ignition lead overhaul for s series heaters Avl RFQ
CD21190 cd21190 pump/ motor universal. Avl RFQ
17E12 17e12 ignition unit overhauled 12 vdc (long legs) Avl RFQ
CD21501 number plate Avl RFQ
CD70089 gauge Avl RFQ
RA-83D55-1 mixer Avl RFQ
CD29111 fuel pump assy Avl RFQ
RA-21452-3 set of 2 carbon brushes- .25" x .25" make up ra-21452-3 brush kit Avl RFQ
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