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OFF - Lights, signs extinguish
Note: If the associated bus fails, internal batteries will power the lights.
Internal batteries always power the floor path lights.
The internal batteries will last for approximately 12 minutes.
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Overhead Panel – Part 4
1) TMR RESET P/B
ON - Passenger system ON light extinguishes
FAULT - Time delay failure (over 30 seconds) to de-energize the unit door latches
2) AVIONICS COMPT LT P/B
AUTO - Avionics compartment lights controlled by door
ON - Compartment lights on
3) SERVICE INT OVRD P/B
OFF - Communication via service interphone jacks possible on ground, 10 seconds
after landing. ON illuminates to indicate service interphone availability.
Service interphones are disabled to prevent interference through interphone
system and are controlled by the LGCIU’s.
ON - Communication possible without landing gear compression
4) LEAK MEASUREMENT VALVE P/B
OFF - MX function: The respective valves close, hydraulic fluid is shut off to the
components of that system.
5) BLUE PUMP OVRD P/B
ON - The blue electric pump is energized provided the blue electric pump switch is
in AUTO
6) FADEC GND PWR
ON - The FADEC is electrically supplied on the ground
7) APU AUTO EXTING TEST P/B
TEST - MX function: The ON light illuminates. The APU master switch must be on,
The APU fire warning; extinguishing and auto shutdown circuits are tested for
10 seconds. The APU will shut down if it is running.
Chapter 4
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8) RESET P/B
Pressed - APU test circuit is reset
9) FLT CTL P/B
ON - Corresponding computer is active
OFF - Corresponding computer is not active. Selecting OFF for 10 seconds then ON
resets computer.
FAULT - Failure of a computer is detected. Extinguishes when OFF is selected.
Note: ELAC FAULT is normally displayed for 8 seconds after initial power
up or power interruption.
2 ELAC’s: Normal Elevator & Stabilizer control. {Roll normal
Aileron control {LAF normal
{Aileron droop
{Roll direct
3 SEC’s: Spoiler control {Roll normal
Standby Elevator & Stab control {Spoilers S/Brake
{LAF Normal/ALT
(SEC 1&2)
{Roll direct
2 FAC’s: Electric Rudder control {ELAC yaw order
{Yaw ALT
{Rudder Trim
{Rudder Travel Limiter
Note: With a SEC 1 or 2 failure you will Lose # 1 Thrust Reverser. With a
SEC 2 or 3 failure you will Lose #2 Thrust Reverser. Thrust Reversers utilize
SEC data for TLA info.
10) CARGO HEAT HOT AIR P/B (If installed)
ON - The cargo hot air pressure-regulating valve regulates hot air
OFF - Closes cargo hot air valve
FAULT - Duct overheat. The cargo hot air valve closes. The Fault light extinguishes
when the duct temperature cools and OFF is selected.
11) CARGO HEAT AFT ISOL VALVE P/B (If installed)
ON - The cargo inlet and outlet isolation valves open and extraction fan runs.
Provided there is no smoke in the aft cargo compartment.
OFF - The Inlet and outlet isolation valves close, extraction fan stops.
FAULT - Valve(s) not in agreement with selected position.
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12) CARGO HEAT AFT SELECTOR (If Installed)
Cold 40°f, Mid 60°f, Hot 80°f
13) FWD/AFT P/B
Discharges the selected fire bottle and arms the other bottle for the same cargo
bay. DISCH 2 light illuminates 60 minutes after the first bottle is discharged as
a reminder to fire second bottle.
A319- Has only one bottle, which may be used, in either cargo bay. Pressing
the appropriate p/b will discharge the cargo fire bottle into its corresponding
cargo compartment.
14) CARGO SMOKE FWD/AFT
SMOKE - Smoke is detected by both channels in one of the two identical modules. (Or
one channel if the other is faulty)
DISCH- Indicates the fire bottle has been discharged.
15) CARGO SMOKE TEST
Smoke detectors are tested in sequence, the SMOKE light illuminates twice,
the DISCH light illuminates and the cargo heat isolation valve closes.
16) BLOWER & EXTRACT P/B
AUTO - When both switches are in AUTO:
On the ground before T/O power is applied the ventilation system is in the
open circuit configuration. Closed circuit if skin temp is below 40°F.
On the ground after T/O power is applied or in-flight, the vent system will go
to the intermediate circuit if skin temp is above 90°f, then as the skin temp
cools the system will go to the closed circuit.
OVRD - With either switch in OVRD, the system goes to the closed circuit, and air
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