FIRE DETECTION SYSTEM OPERATIONAL CHECK

FIRE DETECTION SYSTEM VISUAL CHECK (Continued) - TM-55-1520-240-T-3_551

FIRE DET CIRCUIT BREAKER WILL NOT STAY CLOSED

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 12-2.4 FIRE DETECTION SYSTEM OPERATIONAL CHECK 12-2.4 INITIAL SETUP References: Applicable Configurations: TM 55-1520-240-23 All Equipment Condition: Tools: TM 55-1520-240-23: None Battery Connected Materials: Electrical Power On None Hydraulic Power Off Visual Check of Fire Detection System Performed Personnel Required: (Task 12-2.3) Aircraft Electrician TASK RESULT 1. Check that ENGINE NO. 1 FIRE DET circuit breaker If ENGINE NO. 1 FIRE DET circuit breaker (1) is open, (1) is closed. close it. If it opens again, go to task 12-2.5. 2. Check that ENGINE NO. 2 FIRE DET circuit breaker If ENGINE NO. 2 FIRE DET circuit breaker (2) is open, (2) is closed. close it. If it opens again, go to task 12-2.5. 3. Check NO. 1 ENGINE and NO. 2 ENGINE fire handles If either fire handle (3 or 4) caption FIRE PULL/FUEL (3 and 4). SHUTOFF is lit, go to task 12-2.6 or 12-2.7. 4. Set and hold FIRE DETECTOR switch (5) to TEST. FIRE PULL/FUEL SHUTOFF captions in NO. 1 ENGINE and NO. 2 ENGINE fire handle (3 and 4) shall light. If both captions do not come on, go to task 12-2.8. If either caption does not come on, go to task 12-2.9 or 12-2.10. 5. Release FIRE DETECTOR switch (5). Both FIRE PULL/FUEL SHUTOFF captions in NO. 1 ENGINE and NO. 2 ENGINE fire handles (3 and 4) shall go out. If both captions do not go out, replace FIRE DETECTOR switch (5). FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Electrical power off. Battery disconnected. END OF TASK Change 23 12-34.1/(12-34.2 blank)

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