TM 9-2350-267-10CREW CONTROLS AND INDICATORS - ContinuedAuxiliary Power Unit (APU) Control Box - ContinuedENGINE OIL PRESSURE GageMonitors APU engine oil pressure in pounds per square inch (psi). The gage is graduatedin 10-psi increments from 0 to 60 psi. Normal operating pressure ranges from 25 to 35 psi.This red lamp lights when a low oil pressurecondition exists in the APU Iubricating sys-2-6HIGH AIR TEMP LampThis red lamp lights when the APU over-heats.
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