The Fire Detection Loop Test is a panel that is part of the Lockheed L-1011 fire warning and suppression system. The panel features four annunciators with a "A" and a "B" indicator and four rotary selector switches for either an "A" loop, "B" loop or "BOTH" test for ENG1, ENG2, ENG3 and APU. There are two switches to test the "A" and the "B" loop fire detection system and a "BELL CUTOUT" switch that will silence the fire warning bell in the cockpit.
The panel is located towards the top of the upper Flight Engineer station.
Panel Location
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