Air Conditioning/Pneumatics Flashcards
The D328Jets useful range is approximately __________ with the use of auxiliary fuel tanks.
1,500 NM
What annunciates the status of the main cabin door, galley service door, and baggage compartment door?
Dual Proxy Sensors
What annunciates the status of the two emergency exit doors?
Single Proxy Sensors
The external air door in the tail is annunciated by?
A microswitch
The ground air door is annunciated by?
A microswitch
How many packs does the airplane have?
2
For air conditioning bleed air is initially tapped from?
Low Pressure Bleed Port for high power settings and High Pressure Bleed Port for low power settings.
After bleed air is tapped from either the high or low pressure ports it then passes through?
A Pressure Regulating Shutoff Valve (PRSOV)
The Pressure Regulating Shutoff Valves (PRSOVs) are opened and closed by?
Via a bleed button on the overhead panel.
After bleed air passes through the PRSOV’s, it then passes through?
A Flow Control Shutoff Valve (FCSOV), which lets air into the pack.
The FCSOV’s are manually opened and closed by?
A PACK button on the overhead panel.
The FCSOV’s will automatically close if there is?
- Over-pressure
2. Over-temperature
The heat exchanger receives cooling air from the outside via either?
An electric fan below 120 KIAS, Ram Air above 120 KIAS.
After the air is conditioned/cooled it passes through?
The TCV (temperature control valve) which mixes hot air with the cooled air to maintain the desired temp.
The TCV (temperature control valve) operates in either?
AUTO or MANUAL
Pack air is sent to the cabin via what three ways?
- Overhead Gasper Vents
- Ceiling Ducts
- Floor Ducts
When operating the recirc fans in economy mode only ____% is pack air.
30%
When operating the recirc fans in HIGH, _____% is pack air.
50%
If a single pack is deferred the airplane is limited to FL____.
FL250.
What type of outflow valve is on the airplane and where is it?
Electropneumatic Outflow Valve, Aft baggage compartment bulkhead.
What happens when the guarded DUMP button is pressed?
It opens the Electropneumatic Outflow Valve, and then closes again at 14,500’.
If the automatic pressurization system fails, pressurization can be controlled?
Manually via a pneumatic outflow valve located on the forward pressure bulkhead. This requires no electrical power.
Switching the pressurization mode from AUTO to MAN via the overhead panel switch does what?
Closes the rear Electropneumatic Outflow Valve (to prevent it from trying to compensate from the changes made to the forward outflow valve.)
When the aircraft is on the ground with idle power selected what prevents it from pressurizing?
An electric vacuum pump installed at the forward outflow valve.
How/When does the aircraft begin pressurization?
When takeoff power is applied the vacuum pump de-energizes and allows the forward outflow valve to close.
What altitude does the airplane initially pressurize to after takeoff?
-300 feet of field elevation
The auto pressurization systems maintains takeoff field for how long?
Ten minutes.
On landing what triggers the pressurization system to equalize pressure?
WOW
What cools the avionics?
An EFIS fan and avionics fan.
