TM 55-1520-240-T9-13.12 SECONDARY COCKPIT LIGHTS OPERATIONAL CHECK (Continued)9 - 1 3 . 12TASKRESULT1.2.3.4.5.6.7.8.9.10.11.Check that INSTR FLOOD LIGHTING cir-cuit breaker (1) is closed.Check that DC BUS CONT NO. 1 circuitbreaker (2) is closed.Check that CKPT DIM CONT LIGHTINGcircuit breaker (3) is closed.Set PLT INST lights control (4) to DIM.Set INST and OVHD FLOOD lightsswitches (5 and 6) to ON.Turn FLOOD lights control (7) from OFFthrough DIM to BRT.Set INST FLOOD lights switch (5) to OFF.Set OVHD FLOOD lights switch (6) toOFF.Open NO. 1 DC BUS CONT circuit breaker(2).Turn PLT INST lights control (4) to OFF.Close NO. 1 DC BUS CONT circuit breaker(2).If circuit breaker (1) is open, close it. If it opensagain, go to task 9-13.13.If circuit breaker (2) is open, close it. If it opensagain, go to task 9-13.5.If circuit breaker (3) is open, close it. If it opensagain, go to task 9-13.14.Eight flood lights, six on instrument panel and twobehind pilot’s seat shall come on dim and then in-crease in brightness. If flood lights do not come on,go to task 9-13.15. If flood lights do not increase inbrightness, replace FLOOD lights control (7).Six flood lights on instrument panel shall go out. Ifflood lights do not go out, replace switch (5).Two flood lights behind pilot’s and copilot’s seatshall go out. If flood lights do not go out, replaceswitch (6).All eight flood lights shall come on. If not, go to task9-13.16.Flood lights and indicator lights shall go out. If not,replace PLT INST lights control (4).FOLLOW-ON MAINTENANCE:TM 55-1520-240-23:Battery DisconnectedElectrical Power OffHydraulic Power OffEND OF TASKChange 29-246.3
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