FORMATION LIGHTS OPERATIONAL CHECK

FORM 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 9-5.3 FORMATION LIGHTS OPERATIONAL CHECK 9-5.3 INITIAL SETUP Applicable Configurations: W i t h o u t Tools: None Materials: None Personnel Required: Aircraft Electrician (2) References: TM 55-1520-240-23 Equipment Condition: TM 55-1520-240-23: Battery Connected Electrical Power On Hydraulic Power Off Visual Check of Formation Lights Performed (Task 9-5.2) TASK RESULT 1. 2. 3. 4. Check that LIGHTING FORM circuit break- If FORM circuit breaker (1) is open, close it. If it er (1) is closed. opens again, go to task 9-5.4. Set FORMATION LTS switch (2) to DIM. Five formation lights shall come on dim. If any light is not on, go to task 9-5.5. Rotate FORMATION LTS switch (2) Five formation lights shall get brighter as switch is through intermediate positions to BRT. turned to right. If lights go out or brightness does not increase, go to task 9-5.6. Set FORMATION LTS switch (2) to OFF. Five formation lights shall go out. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Electrical Power Off Battery Disconnected 9-142/(9-143 blank) Change 2

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