
The Nacelle/Pylon Ovht Det Test panel is part of the Fire Warning and Suppression system on the Lockheed L-1011. The panel has a test system for each engine nacelle/pylon combination. Each system is monitored by two fire detection loops; labeled "A" and "B".

Below the dual loop light, there is a loop selector switch for each engine. Pressing the test button illuminates lights to indicate system integrity.

Panel Location
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