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Pressing a fire switch light does what

Pressing a fire switch light does what
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2 votes
Pressing a fire switch light does what

asked
User Goatslacker
by
8.6k points

1 Answer

6 votes
Electrical current fires the squibs in the APU bottle, and pressurized Halon is directed into the APU enclosure. The APU fire protection system is tested simultaneously with the engine fire protection system, via the miscellaneous test panel.
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User Mrshickadance
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