Fire Protection A320 Family

The A320 has

fire

detection and extinguishing systems for the engines and APU smoke detection in the avionics bay smoke detection and

fire

extinguishing systems in the cargo compartments and bathrooms portable fire extinguishers for the flight compartment and cabin the engines and the APU have individual fire detection systems each system consists of two identical detection loops a and B mounted in parallel a fire detection unit FD you for the APU there is only one fire extinguisher bottle and only one discharge button The protected fire witches provide fire indication and the means to isolate the corresponding system. The test buttons are used to test the respective operation of the fire detection and extinguishing system.

In addition to the indications on the fire panel, it has a fire light. For each engine on the engine panel located on the pedestal these lights help identify which engine is on fire there is an additional fire light for the APU and a protected APU shutdown push button located on the external power panel for the avionics system only smoke detection is provided its detector is located in the air exhaust duct avionics smoke indications are located on two panels in the cockpit emergency power panel ventilation panel smoke detection in the bathrooms it consists of a smoke detector in each bathroom connected to the smoke detection control unit SDC you the SDC transmits the signals to the FWC for warnings in the cabin and to the cabin intercom data system see ID to warn in the cabin of the a318 the SD Cu is replaced by the SDF smoke detection function that is integrated into the C ID.

In addition, each lavatory waste container has an automatic fire extinguishing system, a total of six smoke detectors are installed in the cabins. cargo compartments there are two detectors in the forward compartment four in the aft compartment each detector is linked to one of the two detection loops the SD see you on the a319

a320

a321 or C ID the SDF on the a318 acquires the signals sent by detectors and sends them to the FWC for display in the cockpit On the overhead panel there is a charging smoke test button The shielded disc button switches control a fire bottle Each button switch controls a detonator or discharge head the bottle when pressed the fire bottle is completely emptied into the respective compartment the fire extinguishing agent is discharged through one nozzle in the forward compartment or two nozzles in the aft compartment finally there are portable fire extinguishers in the cabin and the type cabin number and locations depend on different customer designs two smoke detectors are installed in a cavity in the overhead compartment the number of detectors per compartment is four detectors in two cavities in the aft bulk cargo compartment two detectors A double loop is installed in a cavity in the front cargo compartment to prevent incorrect warning.

The engine fire extinguishing system is fed by two fireproof bottles in each nacelle. The APU fire extinguishing system is fed by one bottle. red disk is installed on the bottom of the fuselage and indicates whether the APU fire extinguishing bottle is in service cargo compartment fire extinguishing system is supplied by a bottle, since in the forward cargo compartment the Three fire detection units used by the FD are located in zones one through seven. Engine fire detection comprises one FDU per engine and APU fire detection comprises one FDU for the APU. The avionics. ventilation equipment computer an EVC is located in zone one to eight on shelf 88 vu on the aft electronic shelf 80 vu the smoke detection control unit SDC U is located in zone one to two there is only one SDC that supervisors install in the cargo compartment and bathroom on a318 the SDF is performed by the ID directors who are located in zone one to seven in the aft electronics rack eighty vu the SDF ID director monitors the detectors smoke detectors installed in the cargo compartment and in the lavatory in case of APU fire detected on the ground, an automatic extinguishing system will automatically shut down the APU.

The automatic extinguishing system can be tested through the maintenance test panel located on the top panel the fire detection unit FDU processes the signals emitted by the response sensing element and continuously transmits messages to the CFD and or the avionics ventilation computer an EVC tests the avionics compartment smoke detector after manual tests indication of the CFD I the SDC you monitor the smoke detectors installed in the cargo compartment and in the laboratory fault information The equipment is indicated to the CFD I on the A318 to see the identification director The smoke detectors monitored ​​by the SDF are installed in the cargo compartment and in the bathroom.