ENVIRONMENTAL CONTROL SYSTEM
Identify the sections of the ventilation and defog systems and state how their associated components work to provide ram air ventilation and defogging.
Grill: Keeps FOD out of system
Flapper Valve:Allows outside airflow to enter cockpit, controlled by bent control knob.
Axial Blower: Controlled by DEFOG Blower CB type switch located on overhead console.
Defroster Nozzle: Directs air from blower to windscreen.
Bent Control Knobs: Controls flapper valve, 2 on either side of center console.
With both Bent Control Knobs Pulled out all the way.
(BEST) Close vent Control Knobs and turn on A/C or heat with defog blower on.
Identify the major components of the vapor cycle air conditioner and state how they work independently and together to provide cabin air cooling.
Switch panel: Contains 2 switches (Air conditioner On / OFF and fan HI / LOW) and a temperature rheostat.
Compressor: Increases pressure of FREON gas.
Cools freon gas and changes it from a gas to a liquid.
Condenser Blower: Blows air through condenser to cool the freon.
Evaporator: Changes freon liquid to a gas thereby absorbing all the heat from the surrounding area.
Evaporator Blower: Blows cabin air through evaporator to cool it.
NOTE: System requires about 5 HP to operate.
Identify the major components of the bleed air heater system in the new B and C, and state how these components warm the cabin air.
Heater Silencer: Mixes bleed air and cabin air.
Control Valve: Valve overhead pilot’s seat governs the control air.
Regulator Valve: Controlled by control air. Allows bleed air to enter heating system.
Evaporator Fan: Circulates the air
Duct Temp Switch: Activates Caution light when Temp in duct becomes excessive.
Identify the operational procedures associated with monitoring system temperatures.
When Caution light Illuminates: (Heater Malfunction – Duct too Hot)
CABIN HEAT VALVEOFF
AIR COND/FAN switchFAN
If light extinguishes:
If light does not extinguish:
5.Land as soon as possible