EMERGENCY EXIT LIGHTS OPERATIONAL CHECK (Continued)

EMERGENCY EXIT LIGHTS OPERATIONAL CHECK

ONE OR MORE EMERGENCY EXIT LIGHTS WILL NOT GO OUT WHEN SWITCH IS SET TO DISARM

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 17-1.3 EMERGENCY EXIT LIGHTS OPERATIONAL CHECK (Continued) 17-1.3 TASK RESULT 1. 2. 3. 4. 5. Set EMER EXIT LTS or EMER EXIT switch (1) to DISARM. Connect battery. Refer to TM 55-1520-240- 23. Without check CABIN & RAMP lighting circuit breaker (2). With check EMER EXIT lighting circuit breaker (2. 1). Check emergency exit lights (3, 4, and 5). 6. Set EMER EXIT LTS or EMER EXIT switch (1) to ARM. 7. Set EMER EXIT LTS or EMER EXIT switch (1) to TEST. 8. Set EMER EXIT LTS or EMER EXIT switch (1) to ARM. NOTE Leave EMER EXIT LTS switch at ARM for 10 minutes before doing next step. EMER EXIT LTS or EMER EXIT switch must be at DISARM when electrical power is removed. If switch is in ARM and battery switch is turned off, exit lights will come on and discharge inter- nal batteries. If breaker (2) is open, close it. If it opens again, go to task 9-15.4. If breaker (2.1) is open, close it. If it opens again, go to task 17-1.8. Main lamps on emergency exit lights (3, 4, and 5) shall be out. If not go to task 17-1.4. Charge indica- tor lamps on emergency exit lights (3, 4, and 5) shall be on. If not, go to task 17-1.8. Charge indicator lamps shall come on and main lamps shall be off at each emergency exit light (3, 4, and 5). If charge indicator lamps are not on, go to task 17-1.5. If main lamps are on, go to task 17- 1.6. Main lamps shall come on and charge indicator lamps shall be off at each emergency exit light (3, 4, 5). If main lamps do not come on, go to task 17- 1.7. If charge indicator lamps do not go out, replace EMER EXIT LTS or EMER EXIT switch. Main lamps on emergency exit lights (3, 4, and 5) shall go out. If not, go to task 17-1.4. Charge indica- tor lamps on emergency exit lights (3, 4, and 5) shall be on. If not go to task 17-1.5. TASK RESULT 9. Set EMER EXIT LTS or EMER EXIT switch (1) to Main lamps on emergency exit lights (3, 4, and 5) DISARM. shall go out If not, go to task 17-1.4. Charge indica- tor lamps on emergency exit lights (3, 4, and 5) shall be on. If not, go to task 17-1.8. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Battery Disconnected END OF TASK Change 3 17-5

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