 The Fire & Overheat Detection System (F/ODS) provides
continuous fire and overheat detection in engine nacelles
and the auxiliary power unit compartment. The system also
detects hot air leakage from engine bleed air ducting and
identifies the location of the overheat. On detection of an
overheat, the system sends commands to the bleed air isolation
valves. In the event of a fire or overheat condition, the F/ODS reports to the mission
computer via the MIL-STD-1553 data bus. The system consists
of a redundant controller that monitors up to 44 sensor loops.
It operates as a master and slave with cross channel fault
checking to achieve high integrity fire detection. Based on
this technology, a system can be designed and customized to
meet the fire detection needs of most aircraft. The system
may also be incorporated into an integrated utility system
where several aircraft subsystems are combined in a single
package.
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