CONSOLE PANEL LIGHTS OPERATIONAL CHECK (Continued)

CONSOLE PANEL LIGHTS OPERATIONAL CHECK - TM-55-1520-240-T-2_801

CONSOLE CIRCUIT BREAKER DOES NOT STAY CLOSED

TM-55-1520-240-T-2 CH-47D Heilcopter Manual
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TM 55-1520-240-T 9-12.8 CONSOLE PANEL LIGHTS OPERATIONAL CHECK (Continued) 9 - 1 2 .8 TASK RESULT CHECK CONSOLE PANEL LIGHTS 1. 2. 3. 4. 5. 6. Check that CONSOLE circuit breaker (1) is closed. Check that ILLUM SW PWR circuit break- er (2) is closed. Turn CTR CSL control (3) from OFF through DIM to BRT. Turn STICK POSN IND control (4) from OFF through DIM to BRT. Turn CTR CSL control (3) to OFF. Turn STICK POSN IND control (4) to OFF. If CONSOLE circuit breaker (1) is open, close it. If it opens again, go to task 9-12.9. If ILLUM SW PWR circuit breaker (1) is open, close it. If it opens again, go to task 9-12.10. All console panels shall come on dim and increase in brightness as control (3) is turned to BRT. If any panel is not lit, go to task 9-12.11. If panel bright- ness does not increase, replace CTR CSL control. If only one light is out, replace that light. Longitudinal stick indicator (5) shll come on dim and increase in brightness as control (4) is turned to BRT. If indicator (5) is not lit, go to task 9-12.12. If indicator brightness does not increase above dim, replace STICK POSN IND control (4). All console panel lights shall go out. If they do not, replace CTR CSL control (3). Longitudinal stick indicator (5) shall go out. If it does not, replace STICK POSN IND control (4). TASK RESULT CHECK ILLUMINATED SWITCHES 7. 8. 9. 10. 11. 12. 13. 14. Set SYS SEL switch (6) on AFCS panel to OFF. Set PLT INST lights control (7) to OFF. Press and hold BARO ALT switch (8). Release BARO ALT switch (8). Set PLT INST lights control (7) to ON. Press and hold RAD ALT switch (9). Set Pilot inst lights control (7) to OFF. Release RAD ALT switch (9). Caption on BARO ALT switch (8) shall light bright. If it does not come on, go to task 9-12.13. Caption on BARO ALT switch (8) shall go out. Caption on RAD ALT switch (9) shall light dim. If it does not light dim, go to task 9-12.14. Caption on RAD ALT switch (9) shall light bright. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Electrical Power Off Battery Disconnected END OF TASK Change 2 9-228.3

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