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87 Cards in this Set
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On enhanced aircraft the flight attendants are able to adjust the temperature of their cabin zone by how much? |
+/- 4 degreesFahrenheit
TM 3.2.1 |
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How many conditioned zones are there? |
3, flight deck, forward and aft.
TM 3.2.1 |
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Pack output temperature is based on the zone requiring what? |
The zone requiring the coldest temperature.
TM 3.2.1 |
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When does a pack valve close automatically? |
Low air pressure. Pack over heat Engine start Activation of the engine fire pb or Activation of the ditching pb.
TM 3.2.1 |
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What are the paths that warm pre-conditioned bleed air takes after passing a flow control valve? |
It either goes to the hot air trim valve area to warm the air going into the individual zones after the packs or;
It passes through a heat exhanger and then enters into an ACMs (Packs) to be cooled.
TM 3.2.1 |
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On Basic aircraft flight crews can select pack flow to HI flow. What would cause the pack flow to automatically go to HI? |
On single pack operation, or when the APU is the single source of air flow, pack flow automatically reverts to HI flow.
TM 3.2.1 |
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What does the ECON flow pb do on enhanced aircraft? |
It allows the flightcrew to manually select the amount of bleed air flow through the pack.
TM 3.2.1 |
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When the ECON pb is selected, enhanced A/C only, when does the system deliver HI bleed flow regardless of the pb?
pb = pushbotton. |
Single pack operation or if the APU is the bleed air source.
TM 3.2.1 |
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How does the bleed air system respond when a crew selects the ECON pb and the cabin temperature is above the temperature selected?
pb = pushbutton |
The system will revert to normal flow.
How much more is normal flow over ECON flow?
20%
TM 3.2.1 |
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During single pack operation and the APU is the only source of bleed air how does the zone controller command the pack flow controller? |
It commands 120% flow regardless of the pack flow selector.
TM 3.2.1 |
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Basic Aircraft: What is the temperature selection range in degrees on a Basic aircraft? |
64 - 86 degreesFahrenheit
TM 3.2.1
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Basic Aircraft: What happens if the primary channel of a zone controller fails? |
It reverts to its secondary channel.
TM 3.2.1 |
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Basic Aircraft: How would temperature control be affected if a zone controllers secondary channel were to fail? |
The Zone controller functions normally using the primary channel.
TM 3.2.1 |
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Basic Aircraft: What happens if the zone controllers Primary channel fails and it reverts to the zone controllers secondary channel? |
Flow modulation and optimized temperature regulation are no longer available.
Pack 1 controls flight deck Pack 2 controls cabin
"Fixed at 76" displayed on the ECAM COND page and XX is displayed over the failed component.
Pack flow selector and temperature selectors are inoperative.
TM 3.2.1 |
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Basic Aircraft: What happens if both channels(primary and secondary) fail on the zone controller? |
The packs deliver a fixed temperature to the mixing unit. Pack 1 68 degrees Fahrenheit Pack 2 50 degrees Fahrenheit
"PACK REG" is displayed on the ECAM COND page
TM 3.2.1 |
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Basic Aircraft: How are the packs controlled? |
They are controlled by a two channel pack controller.
TM 3.2.1 |
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Basic Aircraft: Where does the pack controllers take their commands from?
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The two channel zone controller.
What temperature does the pack controller provide?
The coldest temperature called for from the three different zones.
TM 3.2.1 |
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Basic Aircraft: The heat exchanger ram air inlet flaps that allow ambient air to pass over the ACM heat exchangers are controlled by what? |
The pack controller.
TM 3.2.1 |
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When are the ram air flaps always closed? |
Ram air flaps are temporarily closed at takeoff thrust application and at touchdown to prevent ingestion of debris.
TM 3.2.1 |
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Enhanced Aircraft: How is temperature controlled? |
By to Air Conditioning System Controllers.
TM 3.2.1 |
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Enhanced Aircraft: What zone(s) does ACSC #1 controll?
ACSC = air conditioning system controller.
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ACSC#1 controlles the flight deck
What does ACSC #2 controll?
The two cabin zones.
Remember theres 1 flightdeck and 2 cabin zones
TM 3.2.1 |
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Enhanced Aircraft: How many channels on the ACSC?
ACSC = air conditioning system controller |
There are 2 Channels.
What happens if either one fails?
Each system controller is fully capable of running the system.
What happens if both channels fail?
Related pack is lost and the hot air pressure regulating valve and trim valves are closed.
TM 3.2.1
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What is the purpose of the hot air pressure regulating valve? |
To automatically control the flow of hot air to the trim valves.
TM 3.2.1 |
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How can the crew control the hot air pressure regulating valve? |
By using the HOT AIR pb on tthe overhead pannel.
TM 3.2.1 |
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Where does the trim air valves get their signals from? |
From the zone controllers(basic), or the ACSC(enhanced).
ACSC - air conditioning system controller
TM 3.2.1 |
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What is the purpose of the trim air valves? |
To mix hot air with cooled pack flow air to achieve the desired zone temperature.
TM 3.2.1 |
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What happens to the trim air system if the hot air pressure regulating valve fails in the open position? |
The trim air system is not affected.
What happens if the hot air pressure regulating valve fails closed?
The trim valves close and individual zone temperature regulation is lost.
TM 3.2.1 |
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What happens if an individual trim valve, part of the air conditioning system, failed in the closed position? |
Zone regulator control is still functional but the respective zone, individual temperature, control is lost.
FYI...If in this case you select the HOT AIR pb off the flight deck temp is controlled by pack 1 and the cabin is controlled by pack 2 using the average temp of the two cabin zones, as selected.
TM 3.2.1 |
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Primarily the ram air scoops located on the underside of the fuselage are for cooling the ACM heat exchangers. What are two other functions the ram air scoops could be used for? |
Fresh air ventilation in the event of dual pack failure or;
For smoke removal.
TM 3.2.1 |
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How can the flight crew open the Ram Air valve? |
By selecting the Ram Air pb on the air conditioning pannel.
If the ditching pb is selected will pressing of the ram air pb cause the ram air valve to open?
No.
TM 3.2.1 |
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If the Ram Air pb is ON, to enhance ventilation, what does the air conditioning system do when the cabin differential pressure is less than 1psi.? |
The system will fully open the outflow valve.
TM 3.2.1 |
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The pneumatic system provides high pressure air for what systems? |
air conditioning pressurization engine starting wing anti-ice hydraulic reservoir pressurization aft cargo heat-if installed water tank pressurization
TM 3.3.1
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High pressure pneumatic air can be supplied by three sources what are they? |
Engine bleed APU load compressor High pressure ground connection
TM 3.3.1 |
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What is the common duct, that all sources of high pressure bleed air supply, called? |
The crossbleed duct.
TM 3.3.1 |
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What is the purpose of the crossbleed valve? |
To interconnect engine 1 or engine 2 bleed system.
TM 3.3.1 |
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Pneumatic system is controlled and monitored by what computer? |
The bleed system computer. BSC
TM 3.3.1 |
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What are the reasons the HP bleed valve will close automatically? |
Low upstream pressure(to prevent backflow) Excessive upstream pressure When the bleed air valve is closed electrically
TM 3.3.2 |
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The bleed air valve serves as a pressure regulating and shut off valve. Where is it located in relation to the IP,interstage pressure, and the HP, high pressure, bleed valves? |
Downstream from them.
TM 3.3.2 |
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When does the pressure regulator shut off valve closes pneumatically? |
When the BMC, bleed monitor computer, detects:
If upstream pressure is low or if reverse flow occurs.
TM 3.3.2 |
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When does the pressure regulator valve closes electrically? |
If the Eng bleed pb is selected off If the ENG Fire pb is pushed or If the BMC detects: over pressure/temperature leak in the system engine start valve open(for engine starting) APU bleed valve open(for bleed off t/o)
TM 3.3.2 |
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With the APU bleed selected to ON what does the BMC command?
BMC = Bleed Monitor Computer |
X-Bleed valve to open(if X-bleed selector AUTO) And the engine bleed valves to close.
TM 3.3.3 |
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The APU provides the pneumatic system provided the APU is at or above what speed? |
95%
TM 3.3.3 |
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What is the point of leaving the APU bleed air ON during takeoff? |
To provided additional engine thrust, because the BMC's will electrically close the pressure regulator valves any time it senses the APU bleed air is ON.
TM 3.3.3 |
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What is the max altitude for use with the APU bleed air ON? |
20000 feet MSL
MSL = mean sea level
TM 3.3.3 |
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Can you use wind anti-ice utilizing the APU bleed air? |
NO.
TM 3.3.3 |
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Where is the connection for External High Pressure bleed air supply? |
Forward of the left main gear well.
TM 3.3.4 |
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In the event of electrical failure what will the cross bleed valve do? |
It remains in its last commanded position.
TM 3.3.5 |
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What does the cross bleed valve do when using the APU bleed air? |
It opens so that both packs may be supplied with bleed air.
TM 3.3.5 |
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When will the cross bleed valve close automatically? |
If a pneumatic leak is detected, except during engine start.
TM 3.3.5 |
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During normal engine bleed operation, APU off, what would the position of the cross bleed valve be? |
Closed.
TM 3.3.5 |
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If the cross bleed valve selector is placed in the SHUT position, when would be cross bleed valve be opened? |
The cross bleed valve will not open under any condition if the cross bleed valve selector is placed in the shut position.
TM 3.3.5 |
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How does the bleed leak detection system work? |
It senses high temperatures from air leaks near the hot air ducts in the fuselage, engine pylons and wings.
TM 3.3.7 |
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How many bleed leak detection loop(s) in the engine pylons, APU and wings? |
Engine pylon and APU have one loop.
Wings have a double loop.
TM 3.3.7 |
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When will a wing bleed leak be detected? |
When both bleed leak loops detect a hot air leak or when one loop detects a leak with the other loop inoperative.
TM 3.3.7 |
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What happens if a bleed leak is detected in the wings? |
Bleed air valve affected side closes Associated ENG BLEED FAULT light illuminates X-Bleed valve closes (except during engine start) APU bleed valve closes(except engine starting) if the leak is on the left wing.
TM 3.3.7 |
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What happens if a bleed leak is detected in an engine pylon? |
Bleed air valve on affected side closes Engine bleed fault light illuminates X-Bleed valve closes except during engine start
TM 3.3.7 |
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What happens if a bleed leak is detected in the APU ducting? |
APU bleed air valve closes APU bleed fault light illuminates X-bleed valve closes except during engine start
TM 3.3.7 |
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What happens if there is a BMC failure?
BMC=bleed monitor computer |
The operating BMC takes over and normal operation of the pneumatics is maintained.
TM 3.3.8 |
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How many pressurization controllers are there and what do they do? |
There are 2 and they serve to automatically regulate cabin altitude.
TM 3.4.1 |
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What are the main components of the pressurization system? |
Control panel (flight deck) 2-Cabin pressure controllers(CPC's) Outflow valve 2-Safety outflow valves
TM 3.4.1 |
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What is the purpose of the safety outflow valve? |
To prevent against excessive cabin differential pressure.
TM 3.4.1 |
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How is the outflow valve actuated? |
Three DC electric motors. 1. Primary 2. Backup 3. Manual valve control
TM 3.4.1 |
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What are the three different modes of pressurization operation? |
1. Automatic (fully automatic) 2. Semi-Automatic 3. Manual
TM 3.4.1 |
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There are two pressurization controllers. One is active and the other is in standby. What happens if one fails and what do the pressurization controllers do after landing? |
The standby will takeover and the system will function normally.
After each landing the systems switch for the next flight.(ie. sys1 active after landing sys 2 act)
TM 3.4.2 |
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Where does the pressurization controllers get their information from regarding landing elevations?
What do you to if the airport elevation is not available? |
The pressurization controllers get landing field elevation from the FMGC.
If the landing field elevation isn't there, you must use the manual elevation selector on the pressurization control panel.
TM 3.4.2 |
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On Enhanced aircraft there is a residual pressure control unit. What is it's purpose and when does it operate? |
It automatically depressurizes the aircraft if there is residual cabin pressure after landing.
It opens automatically if: The outflow valve is not fully open Both CPC's are failed or manual mode is selected The aircraft is on the ground Both engines off, or, ADIRS less than 100 knots
CPC=cabin pressure controller ADIRS=attitude direction inertial reference syst.
TM 3.4.2 |
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What controls avionics ventilation? |
An avionics equipment ventilation computer.
TM 3.5.1 |
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There are two fans that continuously operate for avionics ventilation, a blower and an extract fan. What is the purpose of each fan? |
Blower forces cool air into the avionics bay. Extract draws air from the avionics and panels
TM 3.5.1 |
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What serves to cool the air in the avionics ventilation system? |
A skin heat exchanger.
TM 3.5.1 |
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There are two valves associated with the avionics cooling system. There is an air inlet valve and an extract valve. What is the purpose of each valve? |
The air inlet valve allows ambient air to be drawn into the system
The extract valve allows overboard exhaust of the cooling air.
TM 3.5.1 |
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Name the four configurations of the avionics cooling system. |
1. Open 2.Closed 3. Intermediate 4. Smoke
TM 3.5.1 |
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Explain the open configuration of the avionics ventilation system. When does it operate and how the various components are operating. |
The open configuration is ground only.
Ambient air drawn through inlet valve by blower
Air circulates through avionics compartment and is exhausted overboard through the extract valve by the exhaust fan.
The skin heat exchanger is bypassed.
TM 3.5.1 |
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Explain the closed configuration of the avionics ventilation system. When does it operate and how the various components are operating. |
Normal in-flight configuration, and during ground operations with low ambient temperatures.
Both inlet and extract valves are closed.
Air is drawn from the avionics by the extract fan and circulates through the skin heat exchanger.
Then the air is forced back into the the avionics by the blower fan.
A portion of the cooling air is exhausted under the cargo floor.
TM 3.5.1 |
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Explain the intermediate configuration of the avionics ventilation system. When does it operate and how the various components are operating. |
Functions only in flight with high ambient temps.
Same as closed configuration except that the extract valve is partially opened to allow some exhaust of cooling air.
TM 3.5.1 |
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If either the Blower or Extract Fan Pb is pressed to override, what configuration does the avionics ventilation system use and how are the system components operate. |
The system operates in the closed configuration except that conditioned air is added to the circulation from the air conditioning duct.
TM 3.5.1 |
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What is the visual indication flightcrews have that smoke is detected in the avionics compartment? |
The Blower and Extract Fan pb's will have FUALT lights illuminated and the GEN 1 LINE pb will have SMOKE illuminated.
TM 3.5.1 |
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Smoke is detected in the avionics compartment. Both the Blower and Extract Fan pb's have FAULT illuminated and the GEN 1 LINE pb has smoke illuminated. Following QRH Immediate Action procedures you are instructed to place the BLOWER and EXTRACT fan pb's to OVRD. What does this do? |
Selecting both switches to OVRD causes the blower to stop and the extract fan to continue. Cooling air is introduced into the avionics compartment from the air conditioning system and the cooling air is exhausted overboard.
TM 3.5.1 |
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How are the lavatories and galleys ventilated?
When is this system operating? |
The are ventilated by an extract fan locate near the outflow valve.
It operates constantly anytime the aircraft is powered.
TM 3.5.3 |
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How is the cargo compartment ventilated? |
There is an extract fan in the same proximity of the outflow valve. The extract fan draws cabin air through an isolation valve through the cargo compartment and then exhausted overboard.
TM 3.5.4 |
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The cargo compartment ventilation system utilizes a inlet and outlet isolation valve. What component of the Cargo compartment ventilation system controls their operation? |
The cargo ventilation controller.
TM 3.5.4 |
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How does the extract fan, for the cargo compartment ventilation system, respond when the inlet and outlet isolation valves are fully open? When does it do this? |
When the valves are fully open the extract fan runs continuously on the ground or in flight.
TM 3.5.4 |
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When would the cargo ventilation controller close the inlet and outlet valves and stop the cargo extract fan? |
The crew selects the AFT ISO VALVE pb to off
The aft cargo fire detection unit detects smoke.
TM 3.5.4 |
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If aft cargo ventilation heating is installed, what is utilized to condition the aft cargo compartment temperature? |
The aft cargo compartment heating system uses warm bleed air upstream from the packs and mixes it with cabin air that flows into the cargo compartment through the inlet isolation valve.
TM 3.5.5 |
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How is the cargo ventilation heating regulator valve controlled from the flight deck? |
It is controlled the the HOT AIR pb on the cargo heat panel located on the overhead panel of the flightdeck.
TM 3.5.5 |
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What happens if the cargo ventilation system detects that the temperature of the air passing the inlet isolation valve is at or above 70 degrees C? |
The cargo ventilation system controller will command the cargo hot air trim valves close.
TM 3.5.5 |
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What will the cargo ventilation system controller do if it senses the inlet duct temperature is more than 88 degrees C. |
It commands the cargo HOT AIR pressure regulator valve be closed, and it causes the FAULT light to illuminate on the HOT AIR pb located on the cargo heat panel on the overhead panel of the flightdeck.
TM 3.5.5 |
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If after the cargo ventilation system controller senses the cargo inlet duct temperature has fallen below 70 degrees C. When will the use of cargo heat be enabled by the system? |
Only after the temperature has fallen below 70 degrees C and;
The cargo panel HOT AIR pb was selected to the OFF position. Then;
If the flightcrew selects the HOT AIR pb back to AUTO(dark) the system will reset.
TM 3.5.5
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