Fire Detection Flashcards
What happens when both Fire Detection loops fail?
After 5 seconds, they will trigger the fire alarm
How many Halon bottle are there?
2 per engine, 1 for APU, 1 shared for all cargo holds, 1 in the lavatory waste bin (auto and non-alerting)
How many smoke detector cavities are in the cargo holds?
1 forward, 2 aft (321 has 3 aft)
When will the detector’s trip?
When both loops indicate a fire or one loops detects and the other is inop
Where is the avionics smoke detector?
Air extraction duct
What does the ENG FIRE button do?
Silence aural warning Arms squibs Closes hydraulic fire shut off valve Closes low-press fuel valve Deactivates the IDG Closes the pack flow control valve Closes the engine bleed valve Cuts off FADEC power
What does the GEN 1 LINE pb do?
During an avionics smoke detection, it will:
Disconnect generator 1 from electrical system
EXCEPT will continue to power one fuel pump in each wing tank
What is the CAB FAN?
Cockpit/cabin recirculation fan. Turned off during aviaoinics smoke detection
When you are complete with shutting down both engines, what remaining systems will the battery power?
VHF 1 and the PA
How long does it take to discharge the cargo hold Halon?
60 seconds, remember the smoke lights will remain on for the rest of the flight because the hold is full of Halon particles
Engine: 2 eachAPU: 1
How many fire bottles per engine / APU?
Yes, a fault in one loop (A or B) does not affect the warning system.
Is fire detection available if a loop fails?
Fire warnings.
What happens if both loops fail within 5 seconds?
- Silences the aural fire warning- Arms the fire extinguisher squibs- Closes the LP fuel valve, hydraulic fire shut off valve, engine bleed valve and pack flow control valve.
What happens when a FIRE switch is released out?
“DISCH” lights up amber when its fire extinguisher bottle has lost pressure (being discharged).
Agent DISCH (amber) indicates what?
ENG FIRE test: a continuous repetitive chime sounds, MASTER WARN lights flash. ENG FIRE (APU) warning appears on ECAM. O the fire panel ENG FIRE p/b lights up red, SQUIB lights come on white if discharge supplies are available. DISCH lights come on amber. On the ENG panel (pedestal), the firelights come on red.
What are the indications for an ENG FIRE test? And an APU FIRE test.
This p/b is used for manual APU emergency shutdown- The APU LP fuel shutoff valve closes.- The ECB receives a signal to shutdown sequence (same as the APU automatic shutdown without cool down).- Silences the external warning horn.
On the external fire panel what does the APU SHUT OFF Switch do?
When a detector finds smoke in a lavatory, it sends a signal to the CIDS to FWC to cabin and cockpit warnings. Each lavatory waste bin has an automatic fire extinguisher. (Wax type, melts the discharge).
What happens if a lavatory waste bin catches fire? And lavatory smoke?
2 fire bottles supply 3 nozzles (1 FWD 2 AFT). Each bottle has 2 discharge head 1 for each compartment.
How many fire bottles for CARGO Fire Extinguishing?
2
During a cargo smoke drill, how many DISCH lights are illuminated?
The agent is NOT discharged overboard due to bottle overpressure.
A red disc in the aircraft skin near the APU indicates what?
- SQUIB lights up white when the pilot pops the APU FIRE p/b is released out.- Test p/b
When is white SQUIB light illuminated?
One.
How many fire extinguishing bottles are available for fighting an APU fire?
One smoke detector and one smoke detection control unit.
Each lavatory is equipped with…
Silences the aural fire warning arms the squib on the APU fire extinguisher closes the low-pressure fuel valve the APU bleed valve the X bleed valve shuts off the APU fuel pump and deactivates the APU generator.
What is the result if you press the APU FIRE pb?
One smoke detector in the air extraction duct of the avionic ventilation system detects smoke in the avionics compartment.
What kind of smoke detection is installed in the avionic bay?
The three sensing elements for each engine are located in the pylon nacelle in the engine core and in the engine fan section.
Where are the sensing elements for the fire and overheat detection system located?
Each engine has two fire extinguishers.
How many halon fire extinguishing cylinders are there per engine?
If the system detects an APU fire while the aircraft is on the ground it shuts down the APU automatically and discharges the extinguishing agent.
What happens if the system detects a APU fire on the ground?
Yes.
Can the APU FIRE test be done using battery power only?
Each lavatory wastebin has an automatic fire extinguishing system.
Is a smoke detection or extinguishing system for the wastebins in the lavatory available?
Four smoke detectors and a two channel smoke detection control unit.
The aft cargo compartment smoke detection system consists of…
Yes two fire bottles supply three nozzles (one in the FWD and two in AFT compartment). Bottle 1 is discharged in aprox. 60 s Bottle 2 discharges within aprox. 90 minutes.
Is an extinguishing system in the cargo compartments available?
The bottle discharges automatically if there is an APU fire when the aircraft is on the ground.
When does the APU fire bottle discharge automatically?
Silences the aural fire warning arms the fire extinguisher squibs closes the low-pressure fuel valve the hydraulic fire shut off valve the engine bleed valve the pack flow control valve cuts off the FADEC power supply and deactivates the IDG.
What is the result if you press the ENG FIRE pb?
2 FWD 4 AFT.
How many smoke detectors are installed in the cargo compartments?
Smoke has been detected in the avionic compartment ventilation duct.
Illumination of the GEN 1 LINE SMOKE light indicates…
- Silences the aural fire warning- Arms the fire extinguisher squibs- Closes the hydraulic fire shut off valve- Closes the low-pressure fuel valve- Deactivates the IDG- Closes the pack flow control valve- Closes the engine bleed valve- Cuts off the FADEC power supply
ENG 1 (2) FIRE pb (FIRE panel)
Pressing it does what?
This red light comes on, regardless of the ENG 1 (2) FIRE pb’s position, whenever the fire warning for the corresponding engine is activated.
ENG 1 (2) FIRE LT (FIRE panel)
When does it come on?
A brief push on the button discharges the corresponding fire bottle.SQUIB:Lights up white when the ENG FIRE button is popped for its engine to help the flight crew identify the AGENT pb to be activated.DISCH:Lights up amber when its fire extinguisher bottle has lost pressure.
AGENT 1 (2) pb (FIRE panel)
- SQUIB
- DISCH
When the flight crew presses it:- CRC sounds- MASTER WARN lights flash- ENG FIRE warning on ECAMOn the FIRE panel:- ENG FIRE pb lights up red.- SQUIB lights come on white if discharge supplies are available- DISCH lights come on amberOn the ENG panel (pedestal):- FIRE lights come on red
TEST pb
(FIRE panel - Engines)
Indications of a good test:
- Shuts down APU- Silences the aural warning- Arms the squib- Closes the low-pressure fuel valve- Shuts off the APU fuel pump- Deactivates the APU generator- Closes the APU bleed valve and X bleed valve
APU FIRE pb sw
(FIRE panel)
Pressing it does what?
This button becomes active when the pilot pops the APU FIRE button.The flight crew presses it briefly to discharge the fire bottle.SQUIB:Lights up white when the pilot pops the APU FIRE buttonDISCH:Lights up amber when the fire extinguisher bottle has lost pressure.
AGENT pb
(FIRE panel - APU)
- SQUIB Light
- DISCH Light
- CRC sounds- MASTER WARN lights flash- APU FIRE warning on ECAMOn the APU FIRE panel:- APU FIRE pb lights up red- SQUIB light comes on white- DISCH light comes on amber
TEST pb
(FIRE panel - APU)
Indications of a good test:
The red APU FIRE light comes when the APU fire warning is activated, regardless of the position of the pb.
APU FIRE Light
(FIRE panel)
When does it come on?
FIRE Light:Light comes on red when an engine fire warning is triggered.
FIRE Light
(ENG panel on pedestal)
- FIRE Light
SMOKE light:This red light, and the associated ECAM warning, come on when the system detects smoke in the indicated compartment.DISCH light:Within 60 seconds after pressing the DISCH pb, this amber light comes on, indicating that the agent bottle has fully discharged.
FWD or AFT (lights)
(CARGO SMOKE panel)
SMOKE light
DISCH light
This button ignites the squib to discharge the extinguishing agent in the corresponding compartment (FWD or AFT).
DISCH pb (FWD or AFT) (CARGO SMOKE panel)
Pressing this button for at least 3 seconds, and until it is released:- Tests the smoke detectors in sequence.- Turns on the red smoke lights twice.- Displays the ECAM warning.- Closes the ventilation system’s isolation valves.- Turns on the amber DISCH lights.
TEST pb
(CARGO SMOKE panel)
Indications of a good test:
- 2-Silences the aural fire warning and arms the fire extinguisher squibs- 1-Closes the hydraulic fire shutoff valve- 2-Closes the low-pressure fuel valve and teh IDG fuel return valve- 1-Deactivates the IDG (FADEC power supply also deactivated)- 2-Closes the pack flow control and engine bleed valves
List the actions that occur when an ENGINE FIRE pushbutton is pressed.
The fire extinguisher bottle has lost its pressure
What does an amber DISCH light mean?
- 2-Silences the aural fire warning and arms the APU fire extinguisher squib- 1-Shuts down the APU (ECB)- 2-Closes the low-pressure fuel valve and shuts OFF the APU fuel pump- 1-Deactivates the APU generator- 2-Closes the APU vleed and X bleed valves
List the actions that occur when the APU FIRE pushbutton is pressed.
1 Bottle, which can be discharged to either compartment
How many fire extinguisher are provided for the cargo compartments?
- Pylon Nacelle- Engine Core- Fan Section
Where are the engine fire loops located?
If the failure of both loops occurs within 5 seconds of each other, a FIRE warning will be issued
What happens if both fire loops fail?
2
How many fire extinguisher are provided for each engine?
7 Lights - CRC Sounds - MASTER WARN lights flash (2) - ENG FIRE pb illuminates red (1) - SQUIB and DISCH lights illuminate (2) - ECAM FIRE WARNING (1) - FIRE light on the ENG panel illuminates (1)
What occurs when you press the TEST pushbutton on the ENGINE FIRE panel?
1
How many fire extinguishers are provided for the APU?
5 Lights - CRC Sounds - MASTER WARN lights flash (2) - APU FIRE pb illuminates red (1) - SQUIB and DISCH lights illuminate (1) - ECAM FIRE WARNING (1)
What occurs when you press the APU FIRE TEST pushbutton?
Yes. The APU will automatically shut down at the APU fire extinguisher will discharge.
Does the APU fire extinguisher automatically discharge if a fire is detected on the ground?
No
Does the APU fire extinguisher automatically discharge if a fire is detected in-flight?
Between the respective reservoir and ENG pump
Where are the HYD FIRE SHUTOFF VALVES located?
Smoke detected in the avionic ventilation ducting
What does teh amber SMOKE light in the GEN 1 LINE pushbutton indicate?
FIVE 2’s- 2 amber DISCH lights illuminate and extinguish, then- 2 red SMOKE lights illuminate- 2 MASTER WARNING lights with CRC- 2 CARGO SMOKE lines on ECAM- Test runs TWICE to check both Smoke Detector Control Unit (SDCU) channels
What are the indications when you TEST the CARGO SMOKE?
Yes, during SMOKE configuration
Is the skin heat exchanger ever bypassed in flight?
- Both channels detect smoke, OR- One channel faulty and the other detects smoke
What does the red SMOKE light in the FWD or AFT pushbutton indicate?
- 2 in FWD cargo- 4 in AFT cargo
How many smoke detectors are there?
