Jfkdkdlfjfkfk Flashcards
What is Troubleshooting?
Find out as much about the systems of the problem as possible.
What is ref material?
43.13 for tech data
What are the steps of troubleshooting?
Talk to the pilot Find as much about the problem as possible. Duplicate the problem. Understand operation of the system. Make a list of all possible causes. Work simplest/least expensive, to most complex/expensive.
What does a vapor cycle system work under?
The principle of energy exchange.
What components are part of vapor cycle systems?
Refrigerant, refrigerant oil.
What are the duct temperature sensors used in the temperature system called?
Thermistors
What is boiling point?
The temperature at which a substance changes from a liquid into a vapor.
What is stored in the receiver dryer?
R134a refrigerant is filtered and stored under pressure in a reservoir known as the receiver dryer.
What are most evaporators constructed of?
Copper or aluminum tubing coiled into a compact unit
What is a concern associated with exhaust shroud heat systems?
Exhaust gas could contaminate the cabin!
What does maintenance of combustion heaters consist of?
Cleaning filters, checking spark plug wear, ensuring inlets are not plugged.
Oxygen is a _____, _________, and ________ gas at normal atmospheric temperatures.
Colorless, odorless, and tasteless.
What should be marked on a cylinder containing breathing oxygen?
Aviator’s Breathing Oxygen
At what point are oxygen cylinders considered empty?
When it reaches 50 psi.
What is “ demand flow”?
When oxygen is only delivered as the user inhales
What are the two kinds of oxygen demand regulators?
Diluter demand type, and pressure demand type.
What is the main cause of contamination in an oxygen system?
Moisture.
The cabin pressurization system must be capable of maintaining a cabin pressure altitude of what, regardless of what?
8000 ft or lower, regardless of cruising altitude.
What causes weakening of the aircraft structure?
Repeated pressurization and depressurization.
What three typical sources of air are used to pressurize reciprocating aircraft?
Super charger, turbocharger, engine driven compressor.
Aircraft equipped with turbine engines usually use what?
Bleed air
Aircraft cabin pressurization systems work in two different modes of operation, what are they?
Isobaric mode, constant differential mode.
What can be controlled with the cabin pressure controller?
The cabin altitude, rate of cabin altitude change, barometric pressure setting.
Many transport category aircraft have an outflow valve that operates ________, using signals sent from a _________ located _______ ____ __________ __________ that acts as the pressure regulator.
Electrically, remotely, cabin air pressure controller.
What are pressurization safety relief valves used for?
To prevent the over pressurization of the cabin.
What are negative pressure relief valves used for?
To ensure that the pressure outside the aircraft does not exceed cabin air pressure.5
Aircraft with reciprocating engines often use what?
A vapor cycle AC system.
What two heats are there?
Sensible heat and latent heat
What types of aircraft are exhaust shroud systems typically used on?
Single engine aircraft
What are electric heating systems mainly used for?
As a supplemental heating system
What are combustion heaters mainly used in?
Light and medium twin engine aircraft
What can compression bleed air be used for?
It can be used to heat the aircraft.
What are the different types of heater systems?
Exhaust shroud, electrical, combustion, compressor bleed air.
