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CENTER FLIGHT INSTRUMENT PANEL LIGHTS VISUAL CHECK - TM-55-1520-240-T-2_725
CTR   INSTR   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 9-9.3 CENTER FLIGHT INSTRUMENT PANEL LIGHTS OPERATIONAL CHECK 9-9.3 INITIAL SETUP References: Applicable Configurations: TM 55-1520-240-23 Without  17 or  74 Equipment Condition: Tools: TM 55-1520-240-23: None Battery Connected Materials: Electrical Power On None Hydraulic Power Off Personnel Required: Center Flight Instrument Panel Lights Visual Check Aircraft Electrician Performed (Task 9-9.2) TASK RESULT 1. Check that LIGHTING CTR INSTR circuit breaker (1) is If CTR INSTR circuit breaker (1) is open, close it.  If it closed. opens again, go to task 9-9.4. 2. Turn CTR INST lights control (2) from OFF through All 16 instrument panel lights (3), fuel flow indicator (4) DIM to BRT. internal lights, fire emergency panel (5) lights, and caution lights/vhf antenna select panel (6) lights shall come on dim and increase in brightness as control (2) is turned to BRT.  If any light is not lit, go to task 9-9.5.  If brightness does not increase, replace CTR SECT INST LTS control. 3. Turn CTR SECT INST LTS control (2) to OFF. All center flight instrument panel lights shall go out.  If not, replace CTR SECT INST LTS control. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Battery Disconnected Electrical Power Off END OF TASK 9-182  Change 19







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