Table 41. Power Plants Controls and Indicators

Table 41. Power Plants Controls And Indicators (cont) - TM-1-1520-238-T-4_098

TM-1-1520-238-T-4 Army Model AH-64 Helicopter (NSN
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TM 1-1520-238-T-4 4–12 4–6 CONTROLS AND INDICATORS (cont) 4–6 Table 4–1. Power Plants Controls and Indicators Master Caution/Warning Panel SWITCH/INDICATOR POSITION FUNCTION ENGINE 1 OUT indicator RED Lights when N_P is below 94% or turbine speed (N_G) is below 63% for engine 1. ENGINE CHOP indicator RED Lights when reduced engine rpm for both engines via CHOP collar on collective stick. ENGINE 2 OUT indicator RED Lights when N_P is below 94% or turbine speed (N_G) is below 63% for engine 2. M58-187 ENGINE 1 OUT INDICATOR ENGINE CHOP INDICATOR ENGINE 2 OUT INDICATOR Master Caution/Warning Panel Pilot Caution/Warning Panel SWITCH/INDICATOR POSITION FUNCTION CHIPS ENG 2 indicator AMBER Lights when engine 2 has chip fragments in scavenge oil. OIL PSI ENG 2 indicator AMBER Lights when engine 2 oil pressure is below 25 psi. OIL BYP ENG 2 indicator AMBER Lights when engine 2 oil filter is clogged and bypass has begun. FUEL BYP ENG 2 indicator AMBER Lights when engine 2 fuel filter is clogged and bypass has begun. FUEL PSI ENG 2 indicator RED Lights when engine 2 fuel pressure is less than 9 psi. ENG 2 ANTI–ICE indicator AMBER Lights when engine 2 anti–ice subsystem has failed. ENG 1 ANTI–ICE indicator AMBER Lights when engine 1 anti–ice subsystem has failed. FUEL PSI ENG 1 indicator RED Lights when engine 1 fuel pressure is less than 9 psi. FUEL BYP ENG 1 indicator AMBER Lights when engine 1 fuel filter is clogged and bypass has begun.

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