Air

Cabin Pressure indication can be manually called up in the MFD thru. SYS pushbutton on the EFCP, AIR SD Page;. AIR SD page on respective MFD, repetitive selection SYS pushbutton on MCP, SD page also includes oxygen distribution status;. SYS pushbutton on the MPC, AIR SD page;.

Dual air pack failure will generate. Master caution with associated single chime and 'Pack 1+2 Fault' message on EWD. Pack 1 and 2' message on EWD with associated MC + SC and Pack 1 and 2 fault on the OVHD panel and pack fault on the SD cabin page. MC + SC with _PACK 1+ 2'message on the EWD, Pack fault on the OVHD Panel and Packs amber indication on the SD cabin Page.

RECIRC FAN Failure caution signal is sent by MFC to the FWS. MC and RECIRC 1 + 2 amber message appears on the EWD in case of dual failure, RECIRC FAN fault on the OVHD Panel and RECIRC FAN amber on SD cabin page. MC Flashing + SC, RECIRC FAN Fault on the OVHD panel, Amber _X'on associated RECIRC FAN on the SD cabin page. An amber message 'RECIRC 1(2)' appears on the EWD in case of dual failure, MC Flashing + SC, RECIRC FAN fault light illuminated on the OVHD panel and RECIRC amber on SD cabin page.

Air being bled out from the engine is done by. HP valve at high engine speed and LP valve at low engine speed. LP valve and HP valve depending on PL position. HP valve at low engine speed and LP valve at high engine speed.

Excessive cabin altitude is triggered when. Cabin altitude is greater 10,000 ft. and both outflow valves closes automatically. Cabin altitude reached 10,000 ft. and electropneumatic outflow valve closes automatically,. Cabin altitude is greater than 10,000 ft.

An _EXCESS CAB •P'red message on the EWD is triggered with MW + CRC when. Differential pressure exceeds 6.75 PSI. A 6.35 PSI differential pressure is detected. Differential pressure exceeds 6.35 PSI.

When PACK 1 is selected OFF, an amber _PACK 1'message appears on the EWD. OFF white display replaces PACK on the Cabin SD page. Associated PACK in white color display appears on the Cabin SD page. PACK amber color display appears on the cabin SD page.

During Auto Press Failure, air is being evacuated out of the cabin by. Two outflow valves -electropneumatic and pneumatic outflow valves. In manual mode, the electropneumatic valve remains closed, the pneumatic outflow valve controls the cabin outlet airflow. Only the automatic function is lost and both electropneumatic and pneumatic outflow valves controls the cabin outlet airflow through manual control knob.

In flight or on ground, OVBD valve normal operating position. Fully closed and green full closed indicator on Cabin SD page. Fully closed and full closed indicator on the Cabin SD page. Fully closed and CYAN full closed indicator on Cabin SD page.

AUTO PRESS Failure triggers a MC flashing + SC. An amber fault light on auto press panel and AUTO PRESS amber message on the EWD. Fault light illuminates on MODE SEL pushbutton on CAB PRESS and an amber _AIR AUTO PRESS'message on the EWD. An Amber message appears on the EWD 'AUTO PRESS FAULT'.

Bleed valve is pneumatically operated electrically controlled. Regardless of electrical power supply it will automatically be closed in absence air. Other conditions which lead to bleed valve closure are. BLEED OVHT and BLEED LEAK ONLY. BLEED OVHT, BLEED LEAK,ACTUATION OF FIRE HANDLE and when UPTRIM is triggered. Bleed LEAK but not BLEED OVHT. None.

During engine starting sequence. Bleed valve will be opened ONLY if it is selected ON(PB depressed in). Bleed valve will be opened EVEN if it is selected OFF(PB OUT). BLEED valve will be closed ONLY if it is selected OFF(PB OUT). BLEED valve opening is inhibited regardless of PB position.

If BLEED 1 FAULT encountered during flight, RESET unsuccessful, maximum altitude with BLEED 2 ONLY is. FL200 if OAT exceeds ISA+25. FL200 if OAT exceeds ISA+20. FL200 regardless of OAT. FL170 regardless of OAT.

Left PACK supplies cabin and cockpit with conditioned air, Right PACK supplies only to cabin. If PACK1 is inoperative then. Cockpit won’t get conditioned air. Cabin won’t get conditioned air. Either cabin or cockpit won•t get conditioned air depending on AUTO or MAN mode selection. Both cockpit and cabin will be supplied through mixing chamber.

In case of BLEED LEAK or OVHT. PACK affected side will be closed automatically in both case. Only Bleed valve will be closed but not Pack valve in both case. Bleed valve will be closed in both LEAK OR/AND OVHT but PACK valve will be close only in OVHT. Bleed valve will be closed in both LEAK OR /AND OVHT but PACK valve will be closed only in LEAK.

Air cooling is performed by two ground turbofan through shut off valve or by RAM air depending on IAS, position of landing gear and engine oil low press. Incorrect position of turbofan shut off valve with respect to conditions will lead to. Bleed fault. Pack fault. Bleed or Pack fault. No indication in cockpit.

Temperature selector OVHT caution is triggered when Duct temp exceeds 92•C. in AUTO mode only. in MAN mode only. AUTO or MAN mode. C and when cabin temperature exceeds 22•C.

As soon OAT exceeds 22•c and aircraft has remained exposed to direct sun pre-conditioning becomes necessary for pax comfort prior to boarding. If for any reason it hasn•t possible to bring cabin temperature down to comfortable values following technique can be applied. PACK operation during taxi should be performed with high flow. Air flow should be set to NORM before takeoff and bleeds ON unless performance limited. Airflow should be selected to HIGH as soon as climb power is selected. All of the above.

If you are flying in MAN MODE (Pressurization) which of the function is /are lost. Ditch. Dump. Both. None.

When press test on AUTO PRESS displays 18800 and +8800 alternately with Fault in MAN pb. On ground only. On air only. On ground and on air. None.

What is the indication of extract fan failure in cockpit. Fault light in exhaust mode PB. Fault light on exhaust mode PB and Avionics vent fault. Fault light on exhaust mode PB and TEMP selector. No specific indication.

In ATR 72-600 which of the following is/are true regarding bleed symbol in relevant SD page. GREEN engine bleed: Bleed ON, NO fault. WHITE engine bleed: Bleed OFF,NO fault. AMBER engine BLEED : Bleed Fault. All of the above.

In ATR 72-600 regarding compartment temperature reading which of the following is TRUE. Temperature reading in CABIN SD page displays Temperature of cabin or flight deck compartment depending on selection of compartment selector toggle switch in overhead panel. Temperature reading in CABIN SD always displays temperature of cabin regardless of position of toggle switch. Temperature reading on Cabin SD always displays temperature of flight deck regardless of toggle switch selection. It always displays reading of can duct temperature.

Which of the following is true regarding display of pressurization in relevant SD page in ATR 72- 600?. Cabin altitude GREEN and Target altitude Magenta in AUTO mode. Cabin altitude GREEN only in AUTO mode and Target cabin Altitude Magenta only in MAN mode. Cabin altitude GREEN only in AUTO mode and Cabin altitude GREEN as well as target altitude Magenta in MAN mode.

In ATR 72 600 if pressurization is being operated in MAN mode then Both cabin altitude(GREEN) and Target altitude(MAGENTA) is displayed. Target altitude will be displayed as TARGET LDG ELEVATION (MAGENTA) when. NO Landing elevation is set. When cruising at higher than FL140. When no destination is set on FMS and cruising below FL140. NONE.

PACK VALVES FUNCTIONS ARE: Air pressure control only. Shut off, pressure control and hence flow control. Shut off, flow control, and temperature control.

PACKS PUSH-BUTTON 'ON', MEANS THAT. Pack valve is fully open in all the cases. Pack valve is opened if the opening conditions are met or encountered. Pack valve regulates pressure and airflow in all the cases.

AIR CONDITIONING PACKS ARE INSTALLED: Both in the left landing gear fairing. Both in. the RH landing gear fairing. One each landing gear fairing.

WHICH PACK IS THE PRIMARY SUPPLIER OF COCKPIT AIR?. LEFT. RIGHT. There is no priority.

WHAT HAPPENS TO EXCESS AIR FROM THE LEFT PACK?. It is vented overboard. It is used to supply the cabin. It is used for cargo ventilation.

WHAT IS THE ELECTRICAL POWER SUPPLY FOR THE PACKS?. DC ESS BUS. DC BUS 1 and 2. ACW BUS 1 and 2.

PACK VALVES ARE. Electrically operated and electrically controlled. Pneumatically operated and pneumatically controlled. Pneumatically operated and electrically controlled.

AIR FLOW LEVEL IS CONTROLLED. Automatically, according to the bleed air pressure. Manually, by a single NORMAL/HIGH push-button. A + B are correct.

THE SELECTION OF AIRFLOW 'NORMAL/HIGH' FROM PACKS IS: Automatic, depending of PL position. Automatic, depending of cabin air temperature. Manual, in any case.

WHAT HAPPENS WHEN THE 'PACK FLOW' PUSH-BUTTON IS 'IN', HIGH ILLUMINATES. The recirculation fans start (if the PB are depressed). The recirculation fans continue to run, but at higher speed. Both pack valves are controlled to allow a higher regulated pressure (30 instead of 22 PSI).

PROVIDED THAT THE RELATIVE PACK VALVES ARE NOT CLOSED, THE COOLING FANS ARE RUNNING: Automatically, on ground. Automatically, in flight speed below 150Kts and landing gear is retracted for less than 10 minutes. A + B are correct.

THE COMPT TEMPERATURE SELECTOR: When in manual, the TEMP CTL VALVE is directly controlled by the COMP TEMP SELECTOR. When in auto, the TEMP CTL VALVE is controlled by the COMP TEMP SELECTOR through the ELECTRONIC TEMP CONTROLLER. A + B are correct.

WITH THE TEMP SEL PUSH.BUTTON IN AUTO, THE ELECTRONIC TEMPERATURE CONTROLLER COMPUTES TEMPERATURE CONTROL VALVE POSITION TAKING IN TO ACCOUNT: Zone temperature demand only. (COMP TEMP SELECfOR position). Duct outlet temperature and associated compartment temperature only. Both of the above plus A/C skin temperature.

THE COMPT TEMPERATURE SELECTOR IS OPERATIVE A. B. C. In automatic mode. In manual mode. In both cases.

TEMP SELECTOR PB IN MANUAL MODE: Overheat alarm is inhibited. Overheat alarm is not inhibited. Overheat alarm depends on temperature control selector position.

THE 'COMPT TEMP' INDICATOR DISPLAYS: Only the compartment temperature of the selected side. The pack and duct temperatures of the selected side. The compartment and duct temperatures of the selected side.

THE RECIRCULATION FANS: Are used to improve cooling of heat exchanger on the ground. Are used to increase pack valve airflow when in HIGH MODE. Are used to recirculate a part of the cabin air, to increase fresh air supply.

ON GROUND, THE AIR SUPPLIED TO THE AIR CONDITIONING SYSTEM MAY COME FROM: Engines only. Right engine in HOTEL MODE only. Engines or a ground conditioning unit.

PACK VALVE FAULT MEANS: Actual valve positions disagree with the selected position. Overheat downstream of the compressor (T +204çC\393çF). A + B are correct.

IF A PACK VALVE IS CLOSED OR INOPERATIVE. Hot air is still available from that pack via the TEMP CONTROL VALVE. The other pack supplies both compartments (cockpit, cabin) through the mixing chamber. The other pack supplies both compartments via PNEUMATIC CROSSFEED.

WHEN THE BLEED VALVES ARE SELECTED 'ON' PACK VALVE PB PRESSED IN: Both pack valves open immediately. Pack 1 valve opens immediately; pack 2 valve opens after 6sec. delay. Both pack valves open after 10s delay.

IF THE RELATED ELECTRICAL SUPPLY (OR AIRFLOW) IS LOST, THE PACK VALVES. Remain in the last position. Are spring-loaded closed. Go in full open position.

IN CASE OF PACK OVERHEAT DOWNSTREAM OF THE COMPRESSOR. The pack valve on the faulty side closes. Both pack valves close. No pack valve closes.

IN CASE OF DUCT OVERHEAT DOWNSTREAM OF THE MIXING CHAMBER. The pack valve on the faulty side closes. Both pack valves close. No pack valve closes.

TEMP SELECTOR OVHT CAUTION IS TRIGGERED WHEN: Duct temperature exceeds 92çC. Cabin temperature exceeds 35çC. Compressor temperature exceeds 204çC.

WHAT IS THE MEANING OF A RECIRCULATION FAN 'FAULT' LIGHT?. Fan RPM too low only. Fan motor overheats only. A + B are correct.

BLEED VALVE PB OFF, PACK VALVE PB IN: The pack valve automatically closes and button pops out. Pack valve is closed but FAULT it is inhibited. Pack valve is open and FAULT is illuminated.

HOW MANY OUTFLOW VALVES ARE THERE?. Two: one electro-pneumatic and one pneumatic outflow valves. Two electro-pneumatic outflow valves. Two pneumatic outflow valves.

THE PNEUMATIC OUTFLOW VALVE. Is always slaved to the electro-pneumatic outflow valve. Operates in manual mode only. Is slaved to the electro-pneumatic outflow valve in automatic mode only.

IN NORMAL OPERATION, WITHOUT FAILURE, THE DIGITAL CONTROLLER USES AS REFERENCE THE AIRCRAFT STATIC AIR PRESURE GENERATED BY: ADC 1 and CM 1 altimeter BARO setting. ADC 2 and CM 1 altimeter BARO setting. ADC 1 and 1013 HPa.

IF AUTOMATIC PRESSURIZATION CONTROL IS DESIRED, IN WHICH POSITION SHOULD THE 'MAN RATE KNOB' BE PLACE. NORM. AUTO. 9 o'clock position.

WHAT DO YOU SET IN 'AUTO PRESS PANEL' BEFORE EACH FLIGHT?. Departing airport field elevation, using QNH or zero if using QFE. Landing airport field pressure altitude. Landing airport field elevation, using QNH or zero if using QFE.

HOW HIGH ABOVE TAKE OFF ELEVATION CAN THE AIRCRAFT BE OPERATED WITHOUT CANCELING THE 'AUTOMATIC RETURN' FEATURE?. 500 feet above landing field elevation. 2 500 feet on QNE (1013). 3 500 feet above take off field elevation.

THE MAX CABIN RATE OF CLIMB, UP TO 20000 FT IN AUTO MODE IS: A. B. C. +550 ft/min. +400 ft/min. +500 ft/min.

WHAT IS THE MAXIMUM CABIN DIFFERENTIAL PRESSURE?. Positive 6.35 PSI, limited by a manometric capsule. Negative 0.5 PSI, limited by a non return valve. A + B are correct.

WHAT IS THE MAXIMUM CABIN ALTITUDE (FL250 DIFF. PRESS. 6 PSI)?. 10 000 ft. 6740 ft. 7640 ft.

HOW IS THE SYSTEM PROTECTED AGAINST EXCEEDING THE MAXIMUM CABIN. Both outflow valves incorporate an electrically driven torque motor designed to fully open the valve. Both outflow valves incorporate a manometric capsule (aneroid) to hold the valve open sufficiently to prevent overpressure. Only the electro-pneumatic valve incorporates a manometric capsule to hold the valve open sufficiently to prevent overpressure.

IN AUTO, WHAT IS THE HIGHEST CABIN RATE OF DESCENT AVAILABLE WITH THE DESCENT RATE PUSH-BUTTON RELEASED (NORM)?. -400 ft/min. -500 ft/min. -550 ft/min.

IN AUTO, WHAT IS THE HIGHEST CABIN RATE OF DESCENT AVAILABLE WITH THE DESCENT RATE PB DEPRESSED (FAST)?. -400 ft/min. -500 ft/min. -550 ft/min.

BEFORE LANDING TO AVOID A CABIN PRESSURE BUMP AT TOUCH DOWN, THE CABIN ALTITUDE IS AUTOMATICALLY MAINTAINED AT 300 IT BELOW: Aircraft altitude. Theoretical cabin altitude. Selected landing elevation.

AFTER LANDING, THE CABIN DEPRESSURIZATION RATE IS: +450 ft/min. +550 ft/min. +300 ft/min.

IN CASE OF 'ADC 1' FAILURE, THE DIGITAL CONTROLLER USES AS REFERENCE AIRCRAFT STATIC AIR PRESSURE GENERATED BY: ADC 2 and CM 1 altimeter BARO setting. ADC 2 and CM 2 altimeter BARO setting. ADC 2 and 1013 HPa.

WHAT IS THE CORRECT WAY TO SWITCH FROM AUTOMATIC TO MANUAL OPERATION?. Select MAN the CABIN PRESS PB turn the MAN RATE KNOB to 9 o'clock position and operate the MAN RATE KNOB as required. Turn the MAN RATE KNOB to 9 o'clock position, select MAN the CABIN PRESS PB and operate the MAN RATE KNOB as required. Select MAN the CABIN PRESS PB and operate the MAN RATE KNOB as required.

IN 'MAN MODE', WHAT IS THE HIGHEST CABIN RATE OF DESCENT AND CLIMB AVAILABLE?. -1500 ft/min; +2500 ft/min. -2500 ft/min; +1500 ft/min. -500 ft/min; +1000 ft/min.

WHAT IS THE CORRECT WAY TO SWITCH FROM MANUAL TO AUTOMATIC OPERATION?. Select to AUTO MODE the CABIN PRESS PB and turn the MAN RATE KNOB smoothly to normal position. Turn the MAN RATE KNOB to NORM position and select to AUTO MODE the CABIN PRESS PB. It is not possible.

WHAT HAPPENS IN CASE OF LOSS OF ELECTRICAL SUPPLY TO THE –DIGITAL CONTROLLER”, IN AUTOMATIC MODE?. Both outflow valves remain in the last position. Both outflow valves go to full open. Both outflow valves go to full open.

IN CASE OF TOTAL DC ELECTRICAL POWER LOST: AUTO PRESS mode is lost. MANUAL PRESS mode and CABIN PRESS IND are still available. A. + B are correct.

WHEN IS THE 'DUMP' FUNCTION AVAILABLE?. On ground only, MAN or AUTO PRESS mode. It only works in AUTO PRESS mode. It only works in AUTO PRESS mode, if differential pressure is below 1 PSI.

HOW MANY OUTFLOW VALVES ARE OPENED IN 'DUMP' FUNCTION?. Only the pneumatic valve. Only the electro-pneumatic valve. Both.

SELECTING THE 'DITCH MODE' WITH THE 'DITCH PB': Two electrical motors maintain both outflow valves in closed position, regardless of AUTO or MANUAL PRESS mode use. In addition to the white light on DITCH PB, MASTER CAUTION flashes amber and AIR amber light illuminates on CAP. A + B are correct.

HOTEL MODE NORMAL OPERATION, THE VENTILATION PANEL BEING IN AUTO CONFIGURATION: The OVBD valve is closed, the UIF valve is opened. The OVBD valve is opened, the UIF valve is closed. Both valves are opened.

THE OVERBOARD VALVE POSITION CAN BE SELECTED MANUALLY, USING –OVBD VALVE'OVERRIDE CTL SWITCH: After AUTO mode failure. On ground for cold days use, in order to accelerate cabin heating selecting full close position. A + B are correct.

WHEN LH ENGINE START SEQUENCE IS INITIATED: Extract fan stops during 10 seconds. Extract fan stops during 120 seconds, to avoid pressure shocks, and exhaust mode FAULT illuminates. Extract fan stops during 120 seconds, to avoid pressure shocks, and exhaust mode FAULT doesn't illuminate.

THE OVBD VALVE CTL SWITCH ON AUTO, THE OVBD VALVE POSITION IS FUNCTION OF. The exhaust mode PB position. The aircraft condition (flight or ground, ENG 1 running or not). A + B are correct.

WHEN SHOULD THE AVIONICS VENT SYSTEM EXTRACT FAN STOP?. For 120 seconds after ENG I start. When OVBD is selected on the EXHAUST MODE PB. A + B are correct.

AIRCRAFT IN FLIGHT, OR ON GROUND TWO ENGINES RUNNING, WHAT ARE THE NORMAL POSITIONS OF THE –OVBD'AND –UNDERFLOOR VALVES?. OVBD fully closed, UNDERFLOOR fully closed. OVBD fully closed, UNDERFLOOR fully open. OVBD fully open, UNDERFLOOR fully closed.

PB'IS ON –OVBD”, ACTING ON THE –OVBD'VALVE CONTROL SWITCH: You can change the position of the valve. You cannot change the position of the valve. You can only open the valve.

EXHAUST MODE'FAULT PB IS ILLUMINATED IN CASE OF: OVBD valve position disagreement with associated control. Fan failure or over temperature and CCAS is activated. U/F valve position disagrees with associated control.

WHEN SHOULD THE EXHAUST MODE PB BE SET ON –OVBD”?. In case of an extract fan failure on ground. In case of an extract fan failure in flight. For all ground operations.

IN FLIGHT WITH AN EXTRACT FAN FAILURE, AVIONICS VENTILATION CAN BE PERFORMED BY SELECTING –OVBD'EXHAUST MODE PUSH-BUTTON: This assertion is correct, regardless of the OVBD valve position. Correct assertion, providing the OVBD valve is on auto position. Correct assertion, providing differential pressure is below 1 PSI.

IN FLIGHT, THE EXHAUST MODE PB ON –OVBD'POSITION, AND THE CONTROL SWITCH ON – AUTO'MODE. Extract fan is off, U/F valve is close, OVBD valve is partially open. Extract fan is off, U/F valve is partially close, OVBD valve is partially open. Extract fan is on, U/F valve is close, OVBD valve is partially open.

ILLUMINATION OF THE AVIONICS VENT PANEL EXHAUST MODE PUSH-BUTTON –OVBD'LIGHT, CAUSES THE GROUND MECHANIC CALL HORN TO SOUND: Always on ground. When differential pressure is < 1 PSI. On ground and in flight.

ON THE AVIONICS VENT PANEL, THE –FAULT'LIGHT ILLUMINATES AMBER WHEN: On ground engine 1 not running, OVBD valve is not fully open, (except with OVBD VALVE on full close position). In flight or on ground 2 engines running, OVBD valve is not fully close, (except with OVBD VALVE on full open position). There is any disagreement between the valve and the switch. A+B+C are correct.

WHAT IS THE MAX DIFF. PRESS. ALLOWED TO SELECT THE –OVBD VALVE'TO FULL OPEN POSITION?. 1PSI. .5 PSI. 2PSI.

UNDERFLOOR AND OVBD VALVES ARE FULLY OPEN. THIS IS A POSSIBLE NORMAL CONFIGURATION. Yes. No. Yes on ground only.

AVIONICS VENT PANEL, FAULT ILLUMINATED MEANS. On ground engine 1 not running, OVBD valve is not fully open. On ground or in flight, 2 engines running, OVBD valve not fully closed. A + B are correct.

THE OVBD VALVE IS SET TO FULL CLOSE. To accelerate cabin heating on ground during cold days. During passenger boarding, until door is closed and engine 1 has been started (if no cockpit communication hatch). A + B are correct.