Random Aeronautical Term
HRD fire extinguisher
A fire extinguisher that carries the extinguishing agent in a sealed sphere or cylinder. When the agent-discharged switch is closed, an ignited powder charge drives a cutter through a frangible disc which releases the agent. The entire contents of the container is emptied in much less than a second.
[Source: FAA-H-8083-30B AMT Powerplant Handbook]
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