TM 1-1520-238-T-4Change 36–168.16–85.1. PILOT HIGH RPM ROTOR INDICATOR – DOES NOT LIGHT AT 108% NR (ACW)6–85.1Tools:NomenclaturePartNumberTool Kit, AircraftSC518099CLA01Mechanic’sTool Kit, ElectricalSC518099CLA06Repairer’sMultimeter, DigitalAN/PSM-45Personnel Required:67RAttack Helicopter Repairer68XArmament/Electrical Systems RepairerReferences:TM 1-1520-238-T-6TM 1-1520-238-23Equipment Conditions:RefConditionTM 1-1520-238-23Access provisions –L140 fairing openNon–transparant barrier removedWARNINGTurn off power before detaching orattaching wires and connectors. Highcurrent 28 VDC or 115 VAC is present.Failure to do so could result in death orserious injury.1. Check for open between (A326)TB1–9–G andP49–9.Does open exist?YESRepair open wire.Go to paragraph 6–81.NOGo to step 2.2. Check for open between (A326)TB1–9–M andP49–10.Does open exist?YESRepair open wire.Go to paragraph 6–81.NOGo to step 3.3. Detach (A326)TB1–10–C. Check for openbetween P49–17 and P20–Y.Does open exist?YESRepair open wire. Go toparagraph 6–81.NOGo to step 4.4. Replace engine out warning unit(TM 1-1520-238-23). Repeat paragraph 6–81, step d.Does pilot HIGH RPM ROTOR indicator lightat 108% NR?YESGo to paragraph 6–81.NORefer to TM 1-1520-238-T-6 totroubleshoot the pilot and CPGcaution/warning system.END OF TASK
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