TM 55-1520-240-T4-7.8NO. 1 OR NO. 2 ENGINE CHIP DETECTOR INDICATOR DISPLAY IS ALL BLACK WHEN GND SWITCH SET TO TEST4-7.8FAULT IOSLATION PROCEDUREPersonnel Required:INITIAL SETUPAircraft ElectricianApplicable Configurations:References:Without 74TM 55-1520-240-23Tools:Equipment Condition:Electrical Repairer's Tool Kit,TM 55-1520-240-23: Battery ConnectedNSN 5180-00-323-4915Electrical Power OnMultimeterHydraulic Power OffMaterials:NoneGO TO NEXT PAGE4-190 Change 17
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