R **ON A/C 004-049, 051-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(d) Cargo Compartment
The fire extinguishing system is activated when smoke warnings occurr. The fire extinguisher bottle is controlled from the cockpit.
During the extinguishing procedure, the extinguishing agent flows in rigid pipes and is sprayed in the cargo compartment.
The fire procedure is given by the ECAM system.
**ON A/C ALL
(2) Portable fire extinguishers
When a portable fire extinguisher is operated, pressure causes the extinguishing agent to flow up the syphon tube to the operating head. It flows through the operating head to the nozzle, where it is released.
The correct procedure for the extinguisher operation is shown on the extinguisher label.
6. BITE Test
_________
A. Operational test
The operational test can be performed on the ground or in flight.
The test of the detection and extinguishing circuits is done with the
related TEST pushbutton switch on the respective overhead panels.
(Ref. Fig. 008, 010)
Each engine detection and extinguishing system is monitored by the Fire
Detection Unit (FDU) (one per engine).
The APU detection and extinguishing system is monitored by its own FDU.
APU auto-extinguishing circuit can be tested in the cockpit on the
maintenance panel (50VU).
(Ref. Fig. 011)
**ON A/C 001-003,
Cargo-compartment detection circuit is tested with the related TEST
pushbutton switch on the overhead panel (22VU).
(Ref. Fig. 013)
The cargo-compartment detection system is monitored by the Smoke
Detection Control Unit (SDCU).
R **ON A/C 004-049, 051-099, 101-149, 151-199, 201-299, 301-399, 401-499,
Cargo-compartment detection and extinguishing circuits are tested with the related TEST pushbutton switch on the overhead panel (22VU). (Ref. Fig. 013A)
The cargo-compartment detection and extinguishing system is monitored by the Smoke Detection Control Unit (SDCU).
Smoke Indicating and Controls of the Cargo Compartment
Figure 013
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Smoke Indicating and Controls of the Cargo Compartment
Figure 013A
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**ON A/C ALL
B. Built-In Test Equipment (BITE)
See ATA chapter 31-32-00.
The BITE test for each computer is done at power up or when the maintenance test signal is sent from the MCDU. This test can be done only on the ground (Ref. Fig. 014)
(1)
Engine and APU detection and extinguishing circuits can be tested from the MCDU.
(2)
Smoke detection in lavatory can be tested from the MCDU. The system is monitored by the SDCU.
(3)
Smoke detection in avionics compartment can be tested from the MCDU. The system is monitored by the AEVC (see ATA chapter 21-26-00).
**ON A/C 001-003,
(4) Cargo compartment detection circuit can be tested from the MCDU.
R **ON A/C 004-049, 051-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(4) Cargo compartment detection and extinguishing circuits can be tested from the MCDU.
CFDS Indicating and Controls
Figure 014
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1 1 May 01/04
1 1
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DETECTION - DESCRIPTION AND OPERATION_____________________________________
1. General_______
R
R A. Definition
R
R The design of the fire detection system is different according to the
R area which is monitored.
R
R (1) Overheat and Fire Detection
R - The fire and overheat detection elements are installed in each
R engine nacelle and in the APU compartment.
(2) Smoke detection
- The function of the smoke detection system is to monitor each
lavatory, the avionics compartment and cargo compartments.
2. System Description__________________
R
R A. Fire and Overheat Detection
R
R Thermo-sensitive loops detect fire or overheat conditions. They trigger
R the warning by means of the Fire Detection Unit (FDU) when the
R temperature reaches the threshold of the monitored area.
R (1) Engine
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