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SAAB 340 > SAAB 340 Panels & Lights > Flashcards

SAAB 340 Panels & Lights Flashcards

Memorise the Flight Deck, Panels & Lights book.

1
Q

When does the L/R ENG FIRE warning CWP come on? and how long will it illuminate for?

A
  • Comes on flashing for an engine fire condition.
  • Will remain ON as long as the fire exists.
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2
Q

When does the AVIONIC SMOKE warning CWP come on? and how long will it illuminate for?

A
  • Comes on flashing when smoke is detected in the Avionics Rack.
  • When pushing M/W to cancel, the CWP light goes steady but will stay on until smoke has disapeared.
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3
Q

When does the LAV SMOKE warning CWP come on? and how long will it illuminate for?

A
  • Comes on flashing when smoke is detected in the lavatory.
  • Pushing M/W to cancel, the CWP light will go steady but remain on until smoke has disappeared.
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4
Q

When does the CARGO SMOKE warning CWP come on? and how will it illuminate?

A
  • Comes on flashing when smoke is detected in the Cargo Compartment.
  • Pushing M/W to cancel, the CWP light will go steady but remain on until smoke has disappeared.
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5
Q

When does the L/R ENG OIL PRESS warning CWP come on?

A
  • Comes on if the engine oil pressure is below 30 PSI
  • PGB oil is below 25 PSI with the Power Levers above FI or below 7 PSI with Power Levers below flight idle.
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6
Q

When does the CABIN PRESS warning CWP come on?

A
  • Comes on if the Cabin Altitude is above 10,000 ft or;
  • if cabin DIFF increases above 7.5 PSI.
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7
Q

When does the L/R TAIL P HOT warning CWP come on? What picks up the signal? How does the CWP illuinate when initally on and also when M/W cancelled?

A
  • Comes on flashing when there is an over-temp in the engine tail pipe picked up by any of the three sensors.
  • M/W can be cancelled and the CWP will go steady but light will not go out until temp has come down.
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8
Q

When does the AUTO TRIM warning CWP illuminate?

A
  • Comes on if the AUTOPILOT should detect a failure in the Auto Pilot / Auto Trim or YD auto trim system.
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9
Q

When does the CONFIG warning CWP come on? T/O & Landing?

A
  • Comes on when applying take off power (above 64 degrees PLA) on the ground for the following;
    1. Pitch trim tabs out of green range for T/O.
    2. CL not at MAX position.
    3. Flaps not set for T/O.
  • Comes on when the aircraft is not in the landing configuration (gear down below 500 ft RADALT, less than 64 deg PLA) and also when selecting 20 degrees or more flap without gear down and locked, horn cannot be silenced for this configurtion.
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10
Q

When does the AUTO COARSEN caution CWP come on?

A
  • Comes on to indicate a failure in the Auto coarsen computer.
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11
Q

When does the RUDDER LIMIT caution CWP come on?

A
  • Comes on when the rudder limiting system fails.
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12
Q

When does the PITCH TRIM caution CWP come on? What happens when either EFIS switch is in the XSIDE DATA position?

A
  • Comes on when the pitch trim sync is deavtivated.
  • Pitch, Roll & Heading comparator CAUTION is inhibited.
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13
Q

When does the L/R FIRE DET FAIL caution CWP come on? and how does it illuminate?

A
  • Comes on flashing to indicate a short circuit in the engine fire detection loop.
  • The light will remain illuiminated for as long as the fault is present.
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14
Q

When does the FUEL caution CWP come on? How does it illuminate? Is there any exceptions?

A
  • Comes on flashing whenever a caution light associated with the fuel system comes on (EXCEPT XFEED ON & CONN VALVE OPEN)
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15
Q

When does the ELEC caution CWP come on? How does it illuminate?

A
  • Comes on flashing whenever a caition light associated with the electrical system comes on.
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16
Q

When does the ICE PROT caution CWP come on? How does it illuminate?

A
  • Comes on flashing whenever a caution light associated when the ice protection system comes on.
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17
Q

When does the ENGINE caution CWP come on?

A
  • Comes on together with the L/R FUEL LOW TEMP, L/R OIL BYPASS & L/R CHIP DETECT lights.
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18
Q

When does the FLAPS caution CWP come on?

A
  • Comes on if theres a malfunction in the flap electrical control system.
  • Will also come on when the FLAPS test switch is activated.
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19
Q

When does the AIRCOND caution CWP come on? How will it illuminate?

A
  • Will come on flashing with MASTER CAUTION for;
    1. Bleed air leak,
    2. Bleed air temp to high (288 deg),
    3. Bleed Valve closed,
    4. Bleed Valve is not closed after a closed signal, and
    5. HP Valave not closed after a closed signal.
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20
Q

When does the PARK BRK ON caution CWP come on?

A
  • Comes on when the parking brake handle is pulled and brake pressure exceeds 1700 PSI and goes off when the brake handle is pushed down an pressure decreases to 900 PSI.
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21
Q

When does the HYDR caution CWP come on? What are the parametres the warning uses?

A
  • Comes on to indicate low hydraulic pressure in any of the Hydrualic Accumulators or,
  • High Fluid tempreature in the MAIN Accumulator.
  • Low pressure warning at 1800 PSI, High temp on at 116 deg and goes out at 83 deg.
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22
Q

When does the EMER LTS UNARMED caution CWP come on?

A
  • Comes on when the Emergency Lights Switch is in the OFF position.
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23
Q

When does the OXYGEN caution CWP come on?

A
  • Comes on if oxygen pressure in the main Oxy bottle goes below 800+/-35 PSI.
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24
Q

When does the A-SKID INOP caution CWP come on?

A
  • Comes on when the LDG gear is extended with the ANIT-SKID switch OFF or with a systems fault.
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25
Q

When does the AVIONICS caution CWP come on? How does it illuminate? When does it go out?

A
  • Comes on flashing when EFIS comparator caution is triggered or when either EFIS TEST switch is actuated.
  • Reverts to steady when MASTER CAUTION is reset.
  • Goes out when difference between systems is reduced to within limits.
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26
Q

When does the AVIONICS VENT caution CWP come on?

A
  • Comes on if the avionics vent fan fails.
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27
Q

When does the DOORS caution CWP come on? What doesnt it pick up?

A
  • Comes on if any exit is not secured correctly.
  • No idication will be received from the overwing exit or the forward right type 2 emergency exit.
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28
Q

When does the L STALL FAIL caution CWP come on? What does it then inhibit?

A
  • Comes on if stall warning computer channel 1 or 2 detects
    1. A stall computer failure.
    2. A differenece of 2 degrees angle or more between the dual AOA signals.

In both cases stall warning and push signals from respective computer are inhibited.

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29
Q

When does the GUST LOCK caution CWP come on?

A
  • Comes on when the electric rudder gust lock has remained engaged after the gust lock handle has been disengaged.
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30
Q

When does the PUSHER SYSTEM caution CWP come on?

A
  • Comes on under the following conditions;
    1. Pusher monitoring circuit detects a short and/or open circuit within the pusher servo.
    2. If only one stall computer initiates PUSH with a descrepancy of >6.5 degrees AOA to the other stall computer.
    3. When PUSH 1 and/or 2 signals are initated.
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31
Q

CARGO EXTG Light on the overhead panel comes on when?

A
  • Comes on when the pressure in the extinguisher bottle in the cargo compartment goes below the minimum (approx 260-310 psi) after about 15 minutes of the total 30 minute life of the bottle.
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32
Q

What happens when the FIRE EXTINGUISHER SWITCH Is switched ON?

A
  • The explosive cartridge is fired and the agent is discharged into the cargo compartment.
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33
Q

On the overhead Ice Protection panel what does it mean when the L/R PITOT light is on?

A
  • Comes on when power is lost to the Main Pitot Tubes.
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34
Q

On the overhead Ice Protection panel what does it mean when the L/R ALPHA light is on?

A
  • Comes on when power is lost to the AOA sensor.
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35
Q

On the overhead Ice Protection panel what does it mean when the OAT light is on? What is the 1 condition that needs to also be met for it to illuminate?

A
  • Comes on when the power is lost to the temprature probe.
  • The nose landing gear must be in the retracted position.
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36
Q

On the overhead Ice Protection panel what does it mean when the STBY PITOT light is on?

A
  • Comes on when power is lost to the Standby Pitot Tube.
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37
Q

On the overhead Ice Protection panel, what happens when you select the STBY PITOT SWITCH to the ON position?

A
  • Standby Pitot Tube is powered.
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38
Q

On the overhead Ice Protection panel under the windshield heat heading, what does L/R SIDE & L/R FRONT light mean if they come on?

A
  • Will come on when an overheat or controller fault occurs.
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39
Q

On the overhead Ice Protection panel under the windshield heat heading, what does the L/R SIDE SWITCH do for both aircraft types with either OFF - NORM - HIGH or OFF - ON?

A

Aircraft with NORM & HIGH
* NORM is used for defogging - must be on for 7 minutes before HIGH is selected.
* HIGH used for de-icing and if selected on the ground with the WOW switchs activated HIGH wont be active until gear is up and locked.

Aircraft with OFF & ON
* ON is used for both defogging and de-icing.
* Power in ON position is applied gradually by the controller to reduce thermal stress.

For both types OFF position also resets the controller if tripped.

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40
Q

On the overhead Ice Protection panel under the windshield heat heading, what does the L/R FRONT SWITCH do?

A
  • applies regulated power to the front windshield when set to ON.
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41
Q

On the overhead Ice Protection panel under the Propellor heading, what does the L/R PROP light mean when illuminated?

A
  • Comes on when one or more of the following faults are detected in the system;
    1. AC or DC power failure (DC powers the timer)
    2. Timer not cycling or remain ON,
    3. Over/under current to the prop boots, and
    4. Cycling interval periods are off by >+/- 0.5%.
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42
Q

On the overhead Ice Protection panel under the Propellor heading, what does the L/R PROP SWITCH do when switched ON?

A
  • A timer/monitor initates heating cycles for each symmetrical propeller blade which are;
    1. NORM position: ON for 11 sec OFF for 79 sec.
    2. MAX position: ON for 90 sec OFF for 90 sec.
  • Also illuminates the BLUE L/R PROP DE-ICE light on the status light panel.
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43
Q

On the Centre Instrument Panel is the Status Lights Panel, what does the blue L/R PROP DE_ICE Light mean? When will it go out other than being switched off?

A
  • Comes on when the L/R PROP SWITCH is on and the system is working.
  • Will go out if there is a system failure.
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44
Q

On the overhead Ice Protection panel under the Engine heading, what does the L/R INTAKE light mean?

A
  • Comes on for a failure in teh engine duct electrical anti-ice mat.
45
Q

On the overhead Ice Protection panel under the Engine heading, what does the L/R AIR VALVE light mean? What does this system do?

A
  • This fail light comes on under the following conditions;
    1. If the Electric Solenoid Valve does not open when respective ENGINE anti-ice switch is turned ON.
    2. If the Electric Solenoid Valve does not close when the respective ENGINE anti-ice switch is turned OFF.
  • The system supplies bleed air from the bleed air system to the splitter lip and inlet guide veins for ice protection.
46
Q

On the overhead Ice Protection panel under the Engine heading, what does the L/R ENGINE SWITCH do?

A
  • Controls the electrical and bleed air sections of the engine anti-ice system and illuminates the ENG ANTI-ICE light on the flight status panel on the centre instrument panel.
47
Q

On the Centre Intrument Panel is the Flight Status Panel, when does the blue L/R ENG ANTI-ICE come on?

A
  • Comes on whenever the engine anti-ice switch is ON.
48
Q

On the overhead Ice Protection panel under the AC Heat heading, what does the L/R AC GEN light mean? Can any other combination of lights come on meaning different thing failures and what are they?

A
  • Comes on when the AC Gen is not supplying power.
  1. If a L/R INTAKE light also comes on at the same time, the failure has occurred between the generator and the intake heating mats.
  2. If it occurs before the GCU sensors but after the heating mats, only the AC gen light will come on and load XFR will occur.
  3. If the failure occurs after the GCU pickup, the only light to come on will be the systems light (pitot, AOA sensor etc.) and load XFR has to be manual.
49
Q

On the overhead Ice Protection panel under the AC Heat heading, what does the L/R AC GEN switch do in all positions?

A
  1. ON energizes the AC generator relay and thereby connects the AC generator to the generator bus.
  2. LOAD XFR de-energises the AC generator relay and desconnects the AC generator from the generator bus. This then transfers the load to the other side for power.
  3. OFF/R The AC generator relay is de-energised and the generator is switched off. Also resets the generator control whenever the fault protection has disconnected the generator.
50
Q

On the overhead Ice Protection panel under the Stab & Wing heading, what does the STAB, W INBD, W OUTB & MAN Buttons mean and do?

A
  • The Stab, W INBD and W OUTBD lights illuminate whenever the respective boot system is pressurised and the BOOT IND switch is ON.
  • The MAN buttons are manual de-ice buttons which override the time function and keeps the respective de-ice boot open as long as the button is pressed.
51
Q

On the overhead Ice Protection panel under the Stab & Wing heading, what does the DE-ICE OV TEMP light mean?

A
  • Will come on together with the associated master caution whenever either of the two over heat sensors detects an over temprature of 150 deg.
52
Q

On the overhead Ice Protection panel under the Stab & Wing heading, when does the TIMER light come on?

A
  • Comes on if;
    1. No pressure sensed downstream of the valve sequenced for opening within 4 seconds.
    2. The activated timer gives no inflation signal,
    3. the boots are not cycling,
    4. control power to the time is lost (the light will go out momentarily while the W OUTB button is depressed),
    5. pressure remains on in the stabilizer boot zone when the next boot cycle is activated (auto cycling switch in one cycle) and
    6. pressure remain on in the left and right INBD and left and right OUTB wing boot zone after more than 8 seconds.
53
Q

On the overhead Ice Protection panel under the Stab & Wing heading, what does the AIR SUPPLY & BOOT IND switches do?

A
  • Air supply switch;
    1. ON: Shutoff Valves (in distribution Valve) open this is the guarded position of the switch.
    2. OFF: Shutoff Valves (in Distribution Valave) closed.
  • Boot IND switch;
    1. When OFF the boot indication light system is deactivated.
54
Q

On the overhead Ice Protection panel under the Stab & Wing heading, what does the AUTO CYCLING switche do in CONT, OFF & ONE CYCLE?

A
  • Activates timer to give a 4 - times 6 sec cycle of boot inflation in the following order; Stab, OUTB, INBD, STAB.
    1. CONT position completes one cycle every third minute.
    2. ONE CYCLE position is spring loaded to the OFF position and will comeplete one cycle.
    3. OFF turns the system off.
55
Q

On the overhead panel in row 1 under EFIS heading is a guarded switch with 3 positions which are labeled DRIVE XFR, NORM, XSIDE DATA what does each position do?

A
  • DRIVE XFR:
    1. Used if video signals from own side DPU faisl (indicated by EADI & EHSI going blank). Once selected Video signals are provided from the MFD and EADI pictures on both MFD and EHSI will be the same.
    2. DRIVE XFR light on associated pilots side on the right hand side of the EADI on the instrument panel will come on when this position selected.
    3. DCP functions as normal.
  • NORM:
    1. Normal Operations, no issues.
  • XSIDE DATA:
    1. Used if Attitude and/or heading data fails.
    2. Data is used from opposite side and then displayed on current side.
    3. Both EADI, EHSI, and MFD will be supplied with the same attitude and heading information.
    4. Switched side will dsiplay XATT and XHDG in yellow on the EADI/EHSI
    5. DCP funtions as normal.
56
Q

On the overhead panel in row 1 under EFIS heading is a guarded switch with 3 positions which are labeled ADI REV, NORM, HSI REV what does each position do?

A
  • ADI REV:
    1. Used if the EHSI has failed.
    2. The EHSI displayed is then transferred to the EADI and changed to composite format.
  • NORM:
    1. Normal Operations, no issues.
  • HSI REV:
    1. Used if the EADI has failed.
    2. The EADI display is then transferred to the EHSI and changed to composite format.
57
Q

On the overhead panel in Row 2 under the FUEL heading, What does the L/R VALVE CLOSED light mean when it comes on?

A
  • Comes on when the firewall shutoff valve is closed.
58
Q

On the overhead panel in Row 2 under the FUEL heading, What does the X FEED ON light mean when it comes on? Is there a requirement for it to turn off?

A
  • Comes on when the cross feed valve is open.
  • Will only go out if the valve is fully closed.
59
Q

On the overhead panel in Row 2 under the FUEL heading, What does the X FEED switch do?

A
  • When set to ON the cross feed valve will open and the XFEED ON light will come on indicating the valve is open.
60
Q
A
61
Q

On the overhead panel in Row 2 under the FUEL heading, What does the L/R FUEL FILTER light mean when it comes on?

A
  • Comes on if the fuel bypass filter becomes clogged and the fuel is bypassing the filter.
62
Q

On the overhead panel in Row 2 under the FUEL heading, What does the L/R MAIN PUMP light mean when it comes on?

A
  • Comes on if the pump pressure is low.
63
Q

On the overhead panel in Row 2 under the FUEL heading, What does the L/R LOW LEVEL light mean when it comes on?

A
  • Comes on if the fuel quantity in the tank is below 135kg +/- 35kg.
64
Q

On the overhead panel in Row 2 under the FUEL heading, What does the L/R STBY PRESS light mean when it comes on?

A
  • Comes on if a standby pump pressurises the engine feed line, direct of through the cross feed line.
65
Q

On the overhead panel in Row 2 under the FUEL heading, What does the CONN VLV OPEN light mean when it comes on?

A
  • Comes on when the interconnect valve is open.
66
Q

On the overhead panel in Row 2 under the FUEL heading, What does the L/R STBY PUMP Switch do?

A
  • OFF: Pump is off.
  • AUTO (guarded position): Pump start automatically id main pump pressure is low and condition level out of the fuel off position.

NOTE; The switch in the condition level will inhibit the standby pump from starting in auto.

  • OVRD: Override , the pump is ON.
67
Q

On the overhead panel in Row 2 under the FUEL heading, What does the CONN VALVE Switch do?

A
  • When set in the open position the interconnect valve will open and the CONN VALVE OPEN light will come on, indicating the valve is open.
68
Q

On the overhead panel in Row 2 in the Fire handle Panel, when will the L/R ENG fire handle light come on? What happens when this handle is pulled?

A
  • Will come on red when a fire condition occurs and ramins on until the fire is out.
  • What happens when pulled;
    1. Engine Fire Wall Shutoff Valve is closed,
    2. Engine bleed air LP/HP is closed,
    3. Start-Gen FIELD relay is opened,
    4. Aural fire bell is turned OFF,
    5. Master Warning is reset indicated by the master warning lights going out,
    6. Both main and reserve fire extinguisher SQUIBS for the engine are armed.
69
Q

On the overhead panel in Row 2 in the Fire handle Panel, what does the FIRE EXTG MAIN L/R RES R/L switches do?

A
  • When switch is moved from OFF position after the engine fire handle has been pulled for the associated side, the main extinguishing bottle is discharged to that engine.
  • When the opposite side switch is moved from OFF position the bottle on the opposite side to the fire will dischaege into the engine with the fire via a crossover line.
70
Q

On the overhead panel in Row 2 under the Propeller heading, What does the L/R PUMP guarded switches do in the TEST, OFF & MAN FEATHER positions?

A
  • TEST:
    1. Maintenance funtion for a max of 30 seconds.
  • OFF:
    1. The pump is off. The switch is spriong loaded to the OFF position.
  • MAN FEATHER:
    1. The feather pump will run and the feather solenoid valve will open allowing complete feather of the propeller.
71
Q

On the overhead panel in Row 2 under the Propeller heading, What does the AUTOCOARSEN switch do?

A
  • Control the power to the autocoarsen computer.
72
Q

On the overhead panel in Row 2 under the Engine heading, what does the L/R OIL BYPASS light mean when it comes on?

A
  • Comes on indicating an impending bypass of engine oil filter. ENGINE CWP light illuminates with Master Caution.
73
Q

On the overhead panel in Row 2 under the Engine heading, what does the L/R FUEL LOW TEMP light mean when it comes on?

A
  • Indicates engine fuel temp is too low (0-3 deg) indicating fuel heating failure or insufficient PGB oil. ENGINE CWP and Master Caution will come on.
74
Q

On the overhead panel in Row 2 under the Engine heading, what does the L/R CHIP DETECT light mean when it comes on?

A
  • Indicates presence of magnetic particles in the oil system. ENGINE CWP and Master Caution will come on.
75
Q

On the overhead panel in Row 2 under the Engine heading, what does the L/R IGN guarded switches do in the OFF, NORM & CONT positions?

A
  • OFF:
    1. Ignition is off alowing dry motoring.
  • NORM:
    1. Normal engine start ignition.
  • CONT:
    1. Continuous ignition.
76
Q

On the overhead panel in Row 2 under the Engine heading, what does the NO BATT START light mean when it comes on?

A
  • Comes on when the battery temp is 57 deg and not to start with the aircraft batteries. It is still OK to start off a GPU.
77
Q

On the overhead panel in Row 3 under Test 1 Panel, what does the LAMPS TEST SWITCH do when in the UPR & LWR position and what does it mean when a globe is flashing?

A
  • UPR:
    1. Tests upper annunciator lights and a single chime alert.
  • LWR:
    1. Tests the annunciator light on the flare shield and flight instrument panels together with a tripple chome alert.
  • Flashing means that one light bulb has blown.
78
Q

On the overhead panel in Row 3 under Test 1 Panel, what does the LAMPS LIGHT mean when illuminated?

A
  • This is a WEU status lamp: Comes on white to indicate a failure has been detected causing a loss of redundancy in the Warning Annunciator system. Meaning CWP is unreliable.
79
Q

On the overhead panel in Row 3 under the AC/DC ELEC panel, What does the INVERTER light mean when it comes on?

A
  • Comes on if the slected inverter fails or the inverter switch is in the off position.
80
Q

On the overhead panel in Row 3 under the AC/DC ELEC panel, What does the INVERTER switch do?

A
  • In the 1 or 2 position the respective inverter supplies the 115V AV to the L or R inverter bus 115V AC. 26V AC is also supplied to the L and R inverter BUS 26V AC.
81
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R AVION switch do? and what does the ESS AVION switch do?

A
  • Connects:
    1. The L/R AVIONIC BUS to the respective MAIN BUS.
    2. The L/R AVIONIC START BUS to the respective MAIN START BUS.
  • ESS AVION switch connects:
    1. The ESS AVIONIC BUS to the L ESS BUS and the EMER AVIONIC BUS to the EMER BUS.
82
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R ESS BUS light mean when it comes on?

A
  • Comes on when the ESS BUS is not powered.
83
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R BAT HOT light mean when it comes on?

A
  • Comes on when the battery is overheated (71 deg) causing the battery relay to open and disconnect the battery from the START BUS and the respective GEN BUS.
84
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R BAT light mean when it comes on?

A
  • Comes on when the battery relay is de-energised and the battery is not connected to the START BUS and its respective GEN BUS.
85
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the EMER PWR light mean when it comes on?

A
  • Comes on if the EMERGENCY BUS is not powered or if the emergency power supply voltage drops below 24 volts.
86
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R BAT SWITCH do when in the OFF, ON & OVRD position?

A
  • The switch controls the battery relay connecting the battery to the START BUS and the respective GEN BUS.
  • OFF:
    1. Relay is de-energised and the battery is disconnected from the above BUSES.
  • ON:
    1. Relay is energised and battery connected if EXT PWR is switched OFF.
  • OVRD:
    1. Batter thermal switch (above 71 deg) overridded and battery is connected after a battery overheat and subsequent relay opening. This is independent of EXT PWR switch position (for emergency use only) can be used to charge lead acid batteries.
87
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the green BUS TIE CONN light mean when it comes on?

A
  • Comes on when the L and R GEN BUSES are connected.
88
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the BUS TIE SWITCH do in the 3 positions, CONN, AUTO & SPLIT?

A
  • The bus tie switch controls the BUS TIE relay for the connection of the L and R GEN BUS.
  • CONN position:
    1. The bus tie relay is enrgised with power from the emergency bus and the generator buses are connected.
  • AUTO position:
    1. The BUS TIE relay is energised and the generator buses are connected with abtteries ON and one or both generators not working. With generators working, the generator buses are not connected.
  • SPLIT position:
    1. The BUS TIE is de-energised and the buses are not connected.
89
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R MAIN BUS light mean when it comes on?

A
  • Comes on when the respective bus is not powered.
  • The L/R MAIN BUS is de-energised normally;
    1. During engine start,
    2. When the L/R generator bus are battery powered,
    3. When the MAIN BUS relay has tripped due to tripping generator.
90
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R GEN OV TEMP light mean when it comes on?

A
  • Comes on when the respective generator is overheated (150 deg).
91
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R GEN light mean when it comes on?

A
  • Comes on when the generator relay is de-energised, disconnecting the generator from the generator bus.
92
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the EXT PWR ON light mean when it comes on?

A
  • Comes on indicating the external power is switch on when EXT PWR switch is in the ON position. The light is controlled by the external power relay and will subsequently onyl come on when external power is avaliable.
93
Q

On the overhead panel in Row 3 under the DC ELEC panel, What does the L/R GEN SWITCHES do in the 3 positions, OFF, ON, RESET?

A
  • The GEN switch control the respective generator relay connecting the generator to the respective generator bus.
  • OFF:
    1. The generator is disconnected from its BUS.
  • ON:
    1. The generator control unit allows the generator relay to close provided that the engine is running and the generator provides sifficient electrical power and that no failures are detected.
  • RESET:
    1. The GENERATOR FIELD RELAY and the generator relay are closed again through tyhe generator control unit after ahving been switched off or tripped.

NOTE Pulling the fire handle will trip the field relay.

94
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R DUCT OV TEMP light mean when it comes on? What will close automatically and what duct ov temp light is for which part of the cabin?

A
  • Comes on with associated Master Caution for the following;
    1. ACP Compressor discharge over-temp of 225 deg.
    2. Distrubution duct over temp of 82 deg.

The corresponding BLEED VALVE will close automatically.

  • L DUCT OV TEMP light is for the cabin and R DUCT OV TEMP light is for the flight deck.
95
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R RECIRC light mean when it comes on? Will the AIRCOND MASTER CAUTION come on with this light? How long can you run the recircs on the ground for?

A
  • Comes on when the recirculation fan is failing. (fan speed goes below 80% of normal speed).
  • No the AIRCOND MASTER CAUTION WILL NOT come on.
  • Cant run for longer than 10 min on the ground without adequete airflow under the floor and around the recirculation fan as it will over-temp.
96
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R BLD AIR LEAK light mean when it comes on?

A
  • Comes on with the Master Cuation when a hot air leak is detected by a detection loop running next to the bleed air lines. If the temp in the loop is above 205 deg the light will come on with the Master Caution.
97
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R BLD FAULT light mean when it comes on?

A
  • Comes on with AIRCOND CWP and Master Caution if:
    1. Bleed air temp is too high (288 deg)
    2. Regulated pressure is to high (43.5psi)
    3. BLD VALVE is not closed after a close signal.
98
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R BLD CLOSED light mean when it comes on?

A
  • Comes on together with AIRCOND CWP and Master Caution if the bleed valve is closed.
99
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R HP HIGH light mean when it comes on?

A
  • Comes on together with AIRCOND CWP and Master Caution if High Pressure (HP) Valve fails to close after close signal.
100
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the X VALVE SWITCH do in the open and closed position?

A
  • OPEN:
    1. Valve opened (requires one bleed valve to be closed)
  • Closed:
    1. Valve closed.
101
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R BLD VALVE SWITCH do in the RESET, AUTO & CLOSED positions? When will the bleed valve auto close?

A
  • RESET:
    1. Reset a closed valve if a close signal is not longer present and,
    2. attempting to reativate a failed open bleed valve.
  • AUTO:
    1. Regulates bleed air pressure as a function of altitude.
  • CLOSED:
    1. Vlave closed.
  • Closes the bleed valve automatically if;
    1. Bleed air temp is too high (288 deg)
    2. Fire handle is pulled
    3. Regulated pressure is too high (43.5psi)
    4. ACP compressor discharge is too high (255 deg)
    5. Distribution duct temp is too high (82 deg)
102
Q

On the overhead panel in Row 4 under the AIR COND heading, what does the L/R HP VALVE SWITCH do in the RESET, AUTO & CLOSED positions? When will the vlave automatically close?

A
  • RESET:
    1. Used to reset a close valve is a close signal no longer present (RESET POSITION IS GUARDED)
  • AUTO:
    1. Opens and closes the valve according to high pressure bleed demands (when the LP drops below 76 psi which will occur at about 80% ng)
  • CLOSED:
    1. Vlave closed
  • Will automatically close when:
    1. Bleed air temp is too high and
    2. Fire handle is pulled.
103
Q

On the overhead panel in Row 4 under the DOORS AND STATUS heading, what does the CARGO DOOR light mean when it comes on?

A
  • Comes on if Cargo Door not secured.
104
Q

On the overhead panel in Row 4 under the DOORS AND STATUS heading, what does the MAIN DOOR light mean when it comes on?

A
  • Comes one if Main Door is not secured.
105
Q

On the overhead panel in Row 4 under the DOORS AND STATUS heading, what does the MAIN DOOR HANDLE light mean when it comes on?

A
  • Comes on if Main Door Handle is not secured.
106
Q

On the overhead panel in Row 4 under the DOORS AND STATUS heading, what does the CREW HATCH light mean when it comes on?

A
  • Comes on if Crew Escape Hatch is not secured.
107
Q

On the overhead panel in Row 4 under the DOORS AND STATUS heading, what does the FUELING light mean when it comes on?

A
  • Comes on indicating that the fuelling pannel is operated for fuelling or de-fuelling. Light comes on when either the FUEL PANEL switch is on the FUEL PANEL position of the de-fuelling vale is OPEN.
108
Q

On the overhead panel in Row 4 under the DOORS AND STATUS heading, what does the EXT PWR AVAIL light mean when it comes on?

A
  • Comes on when external power is connected and is avaliable for use.

SAAB 340 (11 decks)

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