Electrical and Fire Protection

Question 1

AC BUS 1 has just failed. Will the AC ESS BUS
remain powered?
▪ Which bus supplies the AC ESS BUS in this
condition?

Answer 1

YES
AC BUS 2 will power the AC ESS BUS

Question 2

What is indicated by a FAULT light in the
GEN pb?

(155)

Answer 2


The associated generator control unit (GCU) trips, or

The line contactor opens (except if GEN pushbutton is selected OFF)

Question 3

157
What does a BAT OFF
light represent?

Answer 3

1. Battery charger limiter is not operating
2. OFF light illuminates if the DC BATT BUS is powered
3. Hot buses remain powered

Question 4

What does the green EXT PWR AVAIL
light indicate?

(159)

Answer 4

External power is connected to the airplane and is good.

(Extinguishes if ON is illuminated or if the external power is disconnected.)

Question 5

What does the blue EXT PWR ON light indicate?

(161)

Answer 5

External power is connected (supplying power) to the electric system

Question 6

What does the battery charger limiter automatically control?

(163)

(When the BAT 1&2 are selected on)

Answer 6

Connection and the disconnection of the corresponding battery to the DC BAT BUS (by closing and opening of the battery line contactor).

Question 7

What does a BAT FAULT light represent?

(165)

Answer 7

Comes on amber, accompanied by an ECAM caution, when the charging current for the corresponding battery is outside limits. In this case the battery contactor opens

Question 8

What does the AC ESS FEED FAULT light
represent?

Answer 8

AC ESS BUS “FEED FAULT” light
means AC ESS BUS is not being
powered

Question 9

What does a FAULT light in an IDG pb represent?

Answer 9

H-O-T-L-O-P
High Oil Temperature
Or
Low Oil Pressure

Question 10

During a One-Engine Taxi:

Which GEN is powering:

AC BUS 1?

AC BUS 2?

(171)

Answer 10

During a One-Engine Taxi:

Which GEN is powering:

AC BUS 1? GEN 1

AC BUS 2? APU

Question 11

Refer to panel below: The aircraft is parked at
the gate following a single engine taxi. What
electrical source is supplying AC BUS 1 and AC
BUS 2?

Answer 11

AC BUS 1 = GEN 1
AC BUS 2 = EXT PWR
GEN 1 (Red Circle) Has No Faults indicating respective
IDG operational (Eng #1 running) & powering AC BUS 1.
GEN 2 (Yellow Circle) Fault light lit, Generator is deenergized
due engine 2 not running.
EXT PWR (Blue Circle) Cyan light ON, powers AC BUS 2
per electrical priority.

Question 12

What does the smoke light in the GEN 1 LINE pbindicate?

(175)

Answer 12

Smoke is detected in the avionics ventilation duct

Question 13

What occurs when the GEN 1 LINE pbis selected OFF?

(177)

Answer 13

 GEN 1 line contactor opens,
 AC BUS 1 channel supplied from GEN 2 through the bus tie contactors,
 Separate circuit is energized from GEN 1 to supply power to one fuel pump in each main tank.

Question 14

What is indicated by a
RAT & EMER GEN FAULT light?

(179)

Answer 14

EMERG GEN is not supplying power when AC BUS 1 & AC BUS 2 are not powered

Question 15

With the RAT MAN ON switch in AUTO,
what will cause the RAT to deploy?

(181)

Answer 15

AC BUS 1 & 2 not supplied, AC Speed greater than 100 KTS

Question 16

What will happen if you press the RED guarded
MAN ON pushbutton?

(183)

Answer 16

Manual RAT extension –Even on the ground

Question 17

Which hydraulic system is pressurized
by deployment of the RAT?

(185)

Answer 17

Blue

Question 18

How long does it take for the EMER GEN
to couple after RAT deployment?

Answer 18

About 8 seconds

Question 19

What automatically occurs if you have an APU
fire while on the ground?

Answer 19

Automatic Shutdown and Automatic Extinguisher activation

(on ground only)

Question 20

Does this indicate a successful ENG FIRE test?

Answer 20

NO

Question 21

What does the white SQUIB light indicate?

(199)

Answer 21

Illuminates white to indicate that the respective fire extinguishing system is armed

Question 22

For a successful Engine Fire system test, what indications
are we looking for in the cockpit?
(Hint: F-E-E-D S-A-M)

Answer 22

F-E-E-D S-A-M

1. FIRE light on ENG panel (pedestal) illuminates RED
2. ENG FIRE1 (2) warning appears on ECAM
3. ENG FIRE pb illuminated RED
4. DISCH lights illuminate AMBER.
5. SQUIB Lights illuminate white
6. A continuous repetitive chime sounds.
7. MASTER WARN lights flash

Question 23

What does the amber DISCH 1 light represent?

Answer 23

Bottle 1 has low pressure

Question 24

When you discharge Agent 2, what indication would you expect to immediatelysee on the Cargo Smoke Panel?

(205)

Answer 24

DISCH AGENT 2 light extinguishes when Squib 2 is ignited

Question 25

When will the DISCH AGENT 2 light illuminate?

(207)

Answer 25

DISCH agent 2 takes up to 60 minutes after discharge of AGENT 1

Question 26

What is the effect of selected RACK POWER OFF?

Answer 26

Power is removed from the
“AFT avionics Compartment Panel”

All controlled systems are completely shut off.

Question 27

What does the SMOKE light indicate
if illuminated in the RACK POWER pb?

Answer 27

Illuminates red and an aural alert sounds when the system detects smoke in the compartment

Question 28

Illumination of an amber agent DISH light indicates_____?

Answer 28

That bottle has lost pressure

Question 29

Pushing and releasing an ENG FIRE pb
closes which valves?

Answer 29

1. Low Pressure fuel valve
2. Hydraulic fire shut off valve
3. Engine Bleed valve
4. Pack flow control valve

Question 30

Pushing and releasing an ENG FIRE pb
accomplishes what actions?

Answer 30

1.
Silences the aural fire warning
2.
Arms the fire extinguisher squibs
3.
Closes the Low pressure Fuel valve
4.
Closes the Hydraulic Fire shut off valve
5.
Closes the Engine Bleed valve
6.
Closes the Pack Flow control valve
7.
Cuts off the FADEC power supply
8.
Deactivates the IDG