TM 55-1520-240-T9-8.3PILOT’S FLIGHT INSTRUMENT PANEL LIGHTS OPERATIONAL CHECK9-8.3INITIAL SETUPReferences:Applicable Configurations:TM 55-1520-240-23Without 17Equipment Condition:Without 74TM 55-1520-240-23:Tools:Battery ConnectedNoneElectrical Power OnMaterials:Hydraulic Power OffNonePilot's Flight Instrument Panel Lights, VisualCheckPerformed (Task 9-8.2)Personnel Required:Aircraft ElectricianTASKRESULT1.Check that LIGHTING PILOT INSTR circuit breaker (1)If PILOT INSTR circuit breaker (1) is open, close it. If itis closed.opens again, go to task 9-8.4.2.Turn PILOT FLT INST LTS control (2) from OFFFollowing lights shall come on and increase in brightnessthrough DIM to BRT.as control (2) is rotated to BRT:a. Panel lights (3)b. Internal lights in indicators (4).c. Panel lights and switch captions VOR, DOP, FM, andCMD on HSI MODE SELECT panel (5).d. Light in standby compass (6).If any light is not lit, go to task 9-8.5. If lights do notincrease in brightness, replace PILOT FLT INST LTScontrol (2).3.Turn PILOT FLT INST LTS control (2) to OFF.All pilot's instrument panel lights shall go out. If they donot, replace PILOT FLT INST LTS control (2).FOLLOW-ON MAINTENANCE:TM 55-1520-240-23:Electrical power off.Battery disconnected.END OF TASK9-170 Change 19
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