Environmental Systems Flashcards
What is the time limit for operating the pitot heat while on the ground?
5 minutes
When should pitot heat be turned on in flight?
Hover/Landing in water, flights in rain, visible moisture
How long should you wait after stopping the heater before you turn the generator(s) off?
2 minutes
Will the heater blower continue to run after the heater had stopped?
Yes, until heater combustion chamber temperature is below 49 deg C
What should you do with the heater function switch if the HEATER HOT caution light is on?
Wait 2 min for cool down
HTR START Sw- Press
Monitor Heater Hot Caution Light
What is the airspeed limit for windshield wiper operation?
130 KCAS
Fuel for the heater comes from what fuel tank?
Right Main
Windshield anti-ice provides what two features?
Anti-Ice, Anti-Fog
The HEATER HOT caution light will stay active until temperature is below ____ and you press what ____?
177 deg C and you press the HTR START switch
What is the purpose of the cabin heater thermostat?
Maintain Cabin Temperature
At what temperature does the thermal switch that protects the avionics in the heater compartment become active?
29 deg C
What component raises fuel pressure for the heater?
Pump in Fuel Control Unit
Which fuel pump switches must be on to operate the heater?
Right Main Fuel Pump Switches
What does the heating system provide to the operating crew?
Heat and Ventilation
Where are the environmental control panels located?
Over Head Switch Panels
Where is the heater unit located in the aircraft?
In the Heater Compartment
Windshield Anti-Icing is provided to which windshields?
Pilot and Co-Pilot
Pull out the cockpit air knobs ____ to preclude dirt and debris from being blasted into the air and crew’s eyes.
Slowly
How long should the operator wait to attempt a restart of the heater if a HEATER HOT caution is active?
2 minutes
If the heater shuts down during icing, do not attempt to restart until?
Ice is removed from the heater intake, heater exhaust, and fuel drain
Before starting the heater ventilation system what position should the Pilot and Co-Pilot air control knobs be positioned?
IN and Closed
What is the purpose of the cabin thermostat?
Maintain Cabin Temperature
Which tank supplies fuel to the Heater Unit?
Right Main
During a fire situation and smoke is in the cabin area what position should the heater function switch be placed in, if heater is not being operated?
ON Position
What position should the wipers be adjusted to during an instrument approach in the rain?
Fast
To prevent windshield damage, do not operate the windshield wipers when windshields are in what condition?
Dry
Windshield Anti- Ice when turned on reaches operating temperature within what time?
Less than one minute
What directs airflow to the MFD’s for the purpose of cooling them?
MAD Vents
