G650 - Air Conditioning and Pressurization
What controls the TROV in manual mode?
During ground operations when the TROV is fully open, the cabin pressure relief valve also opens to ensure a minimal differential cabin pressure with high ECS output.
The airflow leaving the aircraft is regulated by a _____ that opens and closes in response to automatic or manual commands to maintain the desired cabin altitude level.
The TROV is located on the right side of the fuselage.
Cabin pressure control is accomplished via _____ of operation:
What type of air comes from overhead gaspers?
A separate gasper duct, connected only to the cold manifold, supplies cold air to the cabin overhead side panel eyeball outlets.
Cabin Pressure Control - What is the most appropriate statement regarding the MANUAL mode?
The Pressure Relief Valve (PRV) uses aircraft static ports that are located on _____ of the aircraft fuselage.
What are the prerequisites for Emergency Descent Mode (EDM)?
What is the purpose of the ozone converters?
The ozone layer is a region of Earth’s stratosphere that absorbs the Sun’s harmful UV radiation, and its existence has had a profound effect in the proliferation of life on the planet. However, Ozone as a gas is extremely toxic to animals and humans, and can cause acute changes in lung function, directly impacting the entire respiratory system, as well as certain effects (to varying degrees) on the cardiovascular and central nervous system. The presence of Ozone in the surrounding air also changes immune response in the lungs, directly affecting adaptive and innate immune response and affecting the epithelial cells of the lungs. Thus, people suffering pre-existing conditions like asthma may see a worsening of their condition. Ozone also corrodes various plastics and rubbers that are used on an aircraft. Aircraft bleed airflow is used as a source of air used on most commercial aircraft. This bleed air contains a significant amount of ozone at higher altitudes in which modern aircrafts operate. This bleed air can reach temperatures of upto 230 deg.C, when subjected to compression inside air inlets. An ozone converter is thus installed in aircraft cabins to convert harmful ozone into breathable oxygen. This is a process replicated from the naturally-occurring phenomenon where the Sun’s UV radiation splits ozone into oxygen and a free oxygen atom. In the ozone converter, the cores are coated with chemical compounds that, when combined with elevated temperatures of the bleed airflow (in lieu of ultraviolet light), become the catalyst of ozone to oxygen conversion. The conversion takes place when the ozone is in intimate contact with the chemical coating. The development of this small but important part led to planes like the G650 being able to fly at higher altitudes, saving fuel and preserving the overall health of passengers and most importantly the highly-prone aircrew by significantly reducing the exposure to ozone in the cabin.
What is the temperature select range in automatic mode?
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Pressurization control is accomplished by the modulation of the Thrust Recovery Outflow Valve (TROV), which is controlled by the Cabin Pressure Controller (CPC) in the normal operating mode. The primary function of the CPC is to:
In AUTO pressurization mode, if the aircraft levels off for ______ the pressure profile changes from Landing to Flight.
During an Emergency Descent Mode (EDM), the autothrottles will engage if disengaged.
What happens when a PACK switch is selected to ON?
The internal baggage door shall remain closed above _____.
In AUTO pressurization mode, the cabin rate of climb after takeoff is
The turbine bypass valve provides an additional function at high altitudes when cabin heating requirements are greater than cabin cooling, and additional airflow is needed to maintain cabin pressurization. For these reasons the turbine bypass valve opens to allow a more direct path for much of the engine bleed air in the final ACP output rather than routing all of the air through the turbine expansion cooling process. The turbine bybass valve starts to operate above ______.
When does pressurization system automatically switch to FLIGHT and begin to pre-pressurize cabin prior to takeoff?
Also when manually selected by the flight crew.
When the RAM AIR switch is activated, the ACPs will shut down and the aircraft will immediately depressurize (the L PACK and R PACK switches will illuminate OFF).
Both packs are turned off and the Pack Inlet Valves (PIVs) close.
When does FLIGHT-LANDING switch automatically switch to LANDING?
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Selecting the CRANK or START MASTER to ON turns the ______ OFF.
Circumstances that might dictate use of the RAM AIR switch are:
How many temperature zones are there on the G650?
The aircraft interior is supplied with temperature blended air through three supply ducts: cockpit supply duct, Forward cabin supply duct (zone one) and Aft cabin supply duct (zone two)
The Airflow Control System is a combination of two independent systems, the right and left Air Conditioning Controllers (ACCs), and each controls its respective Air Conditioning Pack (ACP). Engine bleed air supplied to the ACPs is taken from:
Under most operating conditions, 5th stage bleed air pressure and temperature is adequate for aircraft systems operation. At low power settings, 8th stage air may be required to meet minimum pressure and/or temperature needs.
Automatic pressurization is available down to what source of power?
What happens in-flight when LANDING is selected on FLIGHT-LANDING switch?
Selecting the MED (Main Entrance Door) switch to the CLOSE position momentarily switches the RIGHT pack OFF only. It facilitates the latching and closing of MED by stopping cabin pressurization.
It momentarily switches both packs OFF. Once the MED is closed the LEFT pack comes on and the RIGHT pack comes on 10 seconds later.
A 'Baggage Compt Low Pressure' (advisory) CAS message will be annunciated if a pressure differential reaches _____ between the cabin and the baggage compartment.
The Pressure Relief Valve (PRV) is located adjacent to the TROV. It prevents excessive positive or negative pressures from damaging the aircraft fuselage, doors and window and associated seals. The PRV provides positive differential pressure relief at _____, negative differential pressure relief at -0.25 psi and additional outflow capability during ground operations (in AUTO mode only).
There are two metering sections: a first chamber opens at 10.80 psi and a second chamber opens at 11.0 psi.
How can you select ram air?
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Ambient ram air is normally used only for cooling in the ACP heat exchangers, after which it is exhausted from the aircraft through the louvers on the aft rear section of the fuselage.
Internal Baggage Door CAS message color logic:
Maximum cabin pressure differential permitted for taxi, takeoff or landing is _____.
When would the flight crew use semi-automatic (SEMI) mode?
The Pressure Relief Valve (PRV) opens _____ after touchdown.
Maximum cabin pressure differential permitted is ______.
During flight, the baggage compartment is pressurized. Conditioned air is routed through a baggage compartment shutoff valve into the baggage compartment. The shutoff valve will close at a differential of between 1.5 to 3.2 psi if the baggage compartment becomes depressurized.
When does ram air check valve open?
The use of manual pressurization will cause the 'Cabin Pressure Low' (warning) CAS message to be displayed at _____ cabin altitude. This is only true if both CPCS channels have failed.
What controls the associated ECS pack discharge air temperature and prevents ice accumulation inside pack by monitoring compressor inlet and compressor outlet temperature?
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The baggage compartment may be deliberately depressurized to remove smoke from the interior of the aircraft. An automatic operated valve, installed above the baggage compartment access door on the cabin side, provides smoke removal.
A manually operated valve, installed above the baggage compartment access door on the cabin side, provides smoke removal. If smoke has been detected in the baggage compartment, the smoke evacuation valve handle may be rotated clockwise to the VENT / SMOKE position to remove smoke from the baggage compartment. Rotating the smoke evacuation valve handle allows the baggage compartment to vent outside the aircraft through the smoke evacuation line inlet in the aft part of the baggage compartment. Once smoke has been cleared from the baggage compartment, rotating the smoke evacuation valve handle back counterclockwise to the horizontal (closed) position then holding the valve reset switch up for 10 seconds allows pressure to return to normal in the baggage compartment.