Pressurization Flashcards
T/F: The aircraft’s pressurization is provided by engine bleed air.
TRUE
Which valve is primarily manipulated to control the pressurization in the cabin of the aircraft?
The AFT Outflow Valve
How many safety valves are there in addition to the Outflow Valve?
2 (AFT Safety Valve and FWD Safety Valve)
How many different modes are there on the pressurization system?
4 control modes AUTO MANUAL EMERGENCY/SMOKE REMOVAL PRESSURE DUMP
Manual mode is used on the pressurization system for what reason?
The AUTO mode is inoperative
Holding the spring-loaded toggle switch on the pressurization panel to the DECR side accomplishes what?
DECREASES cabin pressure by opening the AFT Outflow Valve, this INCREASES cabin altitude
Holding the spring-loaded toggle switch on the pressurization panel to the INCR side accomplishes what?
INCREASES cabin pressure by closing AFT Outflow Valve, this DECREASES cabin altitude
If the AFT outflow Valve becomes inoperative, pressurization can be controlled by what?
FWD Safety Outflow Vave
Lifting the safety guard and rotating the Forward Safety Outflow Valve selector knob to the open position allows the _____ to be full open during emergency operations.
FWD Safety Outflow Valve
When the pressurization system is in AUTO and the FWD Outflow Valve is rotated to the open position, it causes the AFT outflow valve to _____.
CLOSE
this clears smoke in the cockpit without depressurizing the aircraft
Which pressurization mode would be used to depressurize the aircraft most rapidly?
DUMP mode
maximum smoke evacuation
T/F: When the pressurization system is set to DUMP, the aircraft can still be pressurized.
FALSE, the aircraft will not pressurize because the AFT Outflow Valve is fully open
If bleed air is unavailable in flight, the cabin and flight compartments can be ventilated with what?
Outside ram air through a NACA vent on the dorsal fin
The ram air vents used in flight when bleed air is not available are located on which part of the aircraft?
The dorsal fin
What is the maximum pressure differential pressure permitted by the cabin pressure controller?
5.46 PSI