TM 55-1520-240-T9-5.9 FORMATION LIGHTS OPERATIONAL CHECK (WITH )9 - 5 . 9INITIAL SETUPReferences:Applicable Configurations:TM 55-1520-240-23WithEquipment Condition:Tools:TM 55-1520-240-23:Night Vision Goggles AN/AVS-6 or AN/PVS-5ABattery ConnectedElectrical Power Onwith Daylight Filter InstalledHydraulic Power OffMaterials:VisualCheck of Formation Lights With Per-Noneformed (Task 9-5.8)Personnel Required:Aircraft Electrician (2)TASKRESULT1.2.3.4.5.6.7.8.Check that LIGHTING FORM circuit break-er (1) is closed.Check that LIGHTING NVG FORM circuitbreaker (2) is closed.Set FORM NVG-NORM switch (3) toNORM.Set FORM BRT-DIM switch (4) to DIM.Rotate FORM BRT-DIM switch (4)through intermediate positions to BRT.Set FORM BRT-DIM switch (4) to DIM.Set FORM NVG-NORM switch (3) toNVG. Use night vision goggles to view NVGformation lights. During daylight hours shieldambient light.Rotate FORM BRT-DIM switch (4)through intermediate positions to BRT.Rotate FORM BRT-DIM switch (4) toOFF.If FORM circuit breaker (1) is open, close it. If itopens again, go to task 9-5,10.If LIGHTING NVG FORM circuit breaker (2) is open,close it. If it opens again, go to task 9-5.11.Five normal formation lights shall come on dim. Ifany light is not on, go to task 9-5.12.Five normal formation lights shall get brighter asswitch is turned clockwise. If lights go out or bright-ness does not increase; go to task 9-5.13.Eight NVG formation lights shall come on dim. If anylight is not on, go to task 9-5.14.Eight NVG formation lights shall get brighter asswitch is turned clockwise. If lights go out or bright-ness does not increase, go to task 9-5.15.FOLLOW-ON MAINTENANCE:TM 55-1520-240-23:Electrical Power OffBattery Disconnected9-150.2/(9-150.3 blank)Change 2
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