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A320 Systems > PB’s > Flashcards

PB’s Flashcards

1
Q

CABIN PRESS

MODE SEL pb

A

AUTO-normal lights out mode. Allows automatic cabin pressurization and landing elevation

MAN-flight crew can manually adjust cabin altitude with the MAN V/S CTL

FAULT-comes on only when both automatic systems have failed.

Pushing this pb to MAN for at least 10secs then back to AUTO will select the other system

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2
Q

AC ESS FEED pb

A

Normal-Lights out AC BUS 1 is powering the AC ESS BUS

ALTN- when pushed manually selects AC BUS 2 to power the AC ESS BUS

FAULT-AC ESS BUS is unpowered

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3
Q

BAT 1 and 2

A

ON- lights out

OFF-in white and battery line contact is open. Hot bus remains powered

FAULT-amber when charging current is outside limits

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4
Q

IDG 1 or 2 pb

A

Normally lights out

FAULT-amber if IDG oil overheat or IDG oil pressure low

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5
Q

GEN 1 or 2
APU GEN

A

ON lights out

OFF - generator field is de-energized and fault circuit resets

FAULT- associated generator trips

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6
Q

BUS TIE pb

A

Normal lights out

OFF- both tie contractors open

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7
Q

GALLEY pb

A

Auto lights out. Main galley and ife are automatically shed inflight and on the ground with only one generator. Anytime APU or EXT power are hooked up they’re not shed. Secondary galley remains on in all these senerio’s

OFF-Both galleys and ife shed

FAULT-when load on any generator is more than 100% output

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8
Q

COMMERCIAL pb

A

On lights out (all powered)

OFF- commercial loads are off

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9
Q

EMER ELEC PWR

MAN ON pb

A

Auto lights out allows automatic deployment of RAT when both ac buses are not powered and above 100kts

Pressed manually extends RAT

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10
Q

EMER GEN TEST pb

A
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11
Q

GEN 1 LINE pb

A

Normal lights out

OFF- opens contactor

SMOKE- illuminated when smoke is detected in avionics ventilation duct

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12
Q

EMER ELEC PWR

RAT & EMER GEN LIGHT

A

FAULT in red if emergency generator is not supplying power whe AC BUSS 1&2 are not powered

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13
Q

APU panel

MASTER SW
START

A

MASTER SW pb- When pressed blue ON light, power-up test, intake flap opens, APU fuel pump operates if no tank pump is operating, APU page.
Pressed while ON lights on both APU switches go out and starts shutdown sequence
FAULT-amber comes on when an automatic shutdown occurs

START pb-pressed a blue ON light and start sequence initiated and green AVAIL light when on speed

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14
Q

ENG 1&2 BLEED pbs

A

On is lights out

FAULT-amber comes on overheat over press or bleed valve not closed during engine start or APU bleed on
OFF-bleed valve and HP valve close

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15
Q

APU BLEED pb

A

ON illuminates when pushed and valve opens when on speed and no leak

Off- the APU valve closes (no OFF light)
FAULT-amber when detects APU bleed leak

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16
Q

PACK pb

A

On is lights out
OFF- lights and control valve closed
FAULT- control valve disagrees with selected position

17
Q

ADIRS lights and pb’s

A

IR light

FAULT-steady IR is lost
-flashing attitude and heading mode may be recovered in ATT mode

ADR pb

OFF light- air data disconnected
FAULT light-fault detected in air data reference

18
Q

HOT AIR pb

A

On lights out (regulates hot air pressure)
OFF light valve closes and trim air valves closes AND resets the fault circuit
FAULT- light duct overheat

19
Q

HYD panel pbs

A

On lights out for all except yellow ELEC PUMP where an ON light illuminates
FAULT-all pb except PTU
Low level
Overheat
Air press low
Pump press low

20
Q

FUEL pb’s

A

On lights out except X FEED

TK PUMPS pb’s
FAULT- when pressure drops
CTR TK L(R) XFR pb’s
ON - light and turn on if in MAN MODE
FAULT- amber if associated wing tank overflows
MODE SEL pb
Auto lights out
MAN if pushed and must manually manage center tank fuel
FAULT- amber comes on when center tank has more than 550lbs and left or right wing tank has less than 11,000lbs

21
Q

ENG 1 (2) Master Switch
Panel lights

A

FIRE Fire is detected in the associated engine

FAULT The position of the HP fuel shutoff valve is abnormal, or
The automatic start sequence aborts, or
A malfunction of the thrust control

22
Q

ENG 1 (2) FIRE pb

A

Silences aural warning
Arms the extinguisher
Closes low-pressure fuel valve
Closes hydraulic fire valve
Closes engine bleed valve
Closes the pack flow valve
Cuts FADEC power supply
Deactivates the IDG

A320 Systems (9 decks)

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