Dual Channel Smoke Detector (DCSD): One DCSD contains both the A and B channel within one unit.  One unit per enclosure. Each channel (A and B) has separate and autonomous power and ground, and inputs and outputs.

Enclosure and Guard Bar. Stainless steel enclosure that houses the smoke detector.  The enclosure is mounted in the ceiling of the cargo compartment.

Cargo Detection / Suppression Control Panel (CDSCP).  Monitors and controls the entire FPS.  Automatically arms the suppression system to operate to the affected cargo compartment.  Automatically discharges the second extinguisher bottle at the prescribed time (5 Minutes for EASA) after system activation.

Fault Panel Assembly. Monitors each smoke detector in the FPS system, and identifies exact location of faulty detector to ensure quick maintenance.

System Interface Tray Assembly (Pre-Wired).

Located in the E & E compartment, this Interface tray simplifies the connections from the Fault Panel Assy, Smoke Detectors, and the CDSCP harnesses. It simplifies and shortens the time of installation, helps eliminate installation errors, and facilitates trouble-shooting.  This tray assembly has connectors so that the shelf or rack can easily be removed from the aircraft.

System Electrical Harnesses and pre-wired Interface Tray Assembly. Used to connect the FPS components to the aircraft’s electrical system and interfaces (i.e. Master Warning, Master Caution, Aural Warning, Cargo Smoke and Cargo Fire Annunciators, Lamp Test and Aural Warning Silence switches, and System Circuit Breakers.)

Sustaining Distribution Nozzle.  Directs Halon to the top of the cargo compartment. Two are mounted to the ceiling of each  compartment.

Penetrating Distribution Nozzle.

Directs Halon into the cargo load.  One nozzle  is installed in each detector enclosure.

Metering Device. Regulates flow of the sustaining bottle’s discharge to maintain the required duration of protection.  The sustaining discharge provided by the metering device  replaces the agent that is lost due to normal leakage of the compartment under all foreseeable operating conditions.

SUPPRESSION DISTRIBUTION TUBING.  Pre-formed Extinguishing Agent Distribution Tubes deliver the extinguisher agent from the extinguisher bottle assemblies to the system nozzles in the cargo compartment.  This tubing simplifies and reduces the time of installation.

Extinguisher Bottle Assembly. Provides one quick-discharge bottle to quickly saturate the affected cargo compartment with fire ‘Knock-Down’ protection.  The “Knock-Down’ discharge is followed by a sustaining discharge of one or more bottles to sustain the required duration of protection.   The EASA and Extended Duration FPS Kit Configurations use a larger second extinguishing bottle.

Diverter Valve. Directs Halon to the affected cargo compartment

SQUIB TESTER. Used to test the squib firing circuits from the control panel to the extinguisher bottles and diverter valve.

SMOKE ALARM AND FAULT TEST BOX. Used to test the alarm and fault indications on the cockpit control panel.