Environmental System Flashcards
Where does fresh air enter the aircraft?
The intake on each side of the nose cone and is routed through the heater
What switch regulates the amount of intake air?
CABIN AIR
What will happen with both the CABIN AIR/CABIN HEAT fully in?
Provides air flow through the same cabin outlets used for heating
What does the blower do?
Provides ventilation through overhead vents during ground operations
What is the type of heater?
Janitrol combustion heater
How does the janitrol heater work?
Fresh air is brought in, along with fuel from the left tank, where it is swirled around & ignited via a spark plug to provide combustion where heat is then exhausted through the cabin ducts & fumes are exhausted out of an exhaust nozzle
How many thermostats does the heater controls consist of?
2
When the CABIN HEAT control is positioned fully out, what happens when the temperature reaches _____?
It will automatically shut off when the duct temperature reaches 180 degrees.
The further in the control is positioned, the lower the temperature of automatic heater shutoff will be.
What is provided to shut off the heater in case the duct thermostat malfunctions? At what temperature does it occur?
An overheat thermostat to shut off the heater at 300F
How does the overheat thermostat work?
It has a normally-open thermoswitch which will close if an overheat condition occurs.
When it closes, it shorts the heater power supply to ground, blowing a fuse and shutting down the heater.
Can the overheat fuse be rest during flight? Why?
No, it is inside the gear well of the nose wheel.
What will prevent the heater from operating?
If the CABIN AIR control is pulled out more than halfway
When will the heater blower only operate?
If the landing gear is extended and the CABIN AIR control is more than halfway in.
When will the heater blower shutoff?
If the landing gear is retracted or if the CABIN AIR is brought more than halfway out.
How can you direct air to the pilots feet?
Pull out the PILOT AIR control
