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COPILOTS FLIGHT INSTRUMENT PANEL LIGHTS VISUAL CHECK - TM-55-1520-240-T-2_743
COPLT 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 9-10.3    COPILOT’S FLIGHT INSTRUMENT PANEL LIGHTS OPERATIONAL CHECK 9-10.3 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: Copilots Flight Instrument Panel Lights, Visual Aircraft Electrician Check Performed (Task 9-10.2) TASK RESULT 1. Check that LIGHTING COPLT INSTR circuit breaker If COPLT INSTR circuit breaker (1) is open, close it.  If it (1) is closed. opens again, go to task 9-10.4. 2. Turn CO-PILOT FLT INST LTS control (2) from OFF Following lights shall come on and increase in brightness through DIM to BRT. as control (2) is rotated to BRT: a.   Panel lights (3) b.   Internal lights in five indicators (4). c.   Panel lights and switch captions VOR, DOP, FM, and CMD on HSI MODE SELECT panel (5). If any light is not lit, go to task 9-10.5.  If lights do not increase in brightness, replace CO-PILOT FLT INST LTS control. 3. Turn CO-PILOT FLT INST LTS control (2) to OFF.   All copilot's instrument panel lights shall go out If not, replace CO-PILOT FLT INST LTS control (2). FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Electrical power off. Battery disconnected. END OF TASK 9-190  Change 19







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