CABIN AND RAMP LIGHTS OPERATIONAL CHECK

CABIN & RAMP CIRCUIT BREAKER DOES NOT STAY CLOSED - TM-55-1520-240-T-2_879

TM-55-1520-240-T-2 CH-47D Heilcopter Manual
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TM 55-1520-240-T 9-15.3 CABIN AND RAMP LIGHTS OPERATIONAL CHECK 9 - 1 5 .3 INITIAL SETUP References: Applicable Configurations: Tools: None Materials: None Personnel Required: Aircraft Electrician TM 55-1520-240-23 Equipment Condition: TM 55-1520-240-23: Battery Connected Electrical Power On Hydraulic Power Off Visual Check of Cabin and Ramp Lights Performed (Task 9-15.2) TASK RESULT 1. 2. 3. 4. 5. 6. 7. 8. Check that LIGHTING CABIN & RAMP cir- cuit breaker (1) is closed. Press and release CAB & RAMP LT WHT ON pushbutton (2). Momentarily set CAB & RAMP LT switch (3) to ALL OFF. Momentarily set CAB & RAMP LT switch (3) to RED ON. Press and release CAB & RAMP LT WHT ON pushbutton (2). Momentarily set CABIN switch (4) to ALL OFF. Momentarily set CABIN & RAMP LIGHTS & RAMP LIGHTS switch (4) to RED ON. Momentarily set CABIN & RAMP LIGHTS switch (4) to ALL OFF. If CABIN & RAMP circuit breaker (1) is open, close it. If it opens again, go to task 9-15.4. All five dome white lights shall come on. If any light is not lit, go to task 9-15.5. All dome white lights shall go out. If lights do not go out, go to task 9-15.6. All five dome red lights shall come on. If any light is not lit, go to task 9-15.7. All dome red lights shall go out and all dome white lights shall come on. If both red and white dome lights are lit, locate and repair shorted wiring be- tween WHT ON switch (2) and cabin red light relay. All dome white lights shall go out. If lights do not go out, go to task 9-15.8. All dome red lights shall come on. If lights are not lit, go to task 9-15.9. All dome red lights shall go out. If lights do not go out, go to task 9-15.8. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Battery Disconnected Electrical Power Off 9-262/(9-263 blank) Change 2

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