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COUNTERMEASURES DISPENSER TEST SET DOES NOT INDICATE A FIRED EXPENDABLE WHEN PILOTS FLARE DISP SWITCH IS PRESSED
COUNTERMEASURES DISPENSER TEST SET DOES NOT INDICATE A FIRED EXPENDABLE WHEN ONE CREW DISPENSE SWITCH IS PRESSED

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 16-220     Change 24       6-5.10  COUNTERMEASURES DISPENSER TEST SET DOES NOT INDICATE A FIRED EXPENDABLE WHEN PILOT’S FLARE DISP SWITCH IS PRESSED (Continued)       16-5.10 WITH PILOT’S FLARE DISP SWITCH DEPRESSED; IS CONTINUITY PRESENT BETWEEN 300J29 PINS C AND D? DISCONNECT PLUG 300J29 FROM PILOT’S CYCLIC STICK.  IS 28 VDC PRESENT AT PIN D? IS 28 VDC PRESENT ON DCDU PLUG 147P30 PIN 27 WHEN PILOT’S FLARE DISP SWITCH IS DEPRESSED? REMOVE AND REPLACE FAULTY PILOT’S CYCLIC STICK GRIP. OPEN EAPS/MEAPS CB PANEL.  IS 28 VDC PRESENT ON CIRCUIT SIDE OF DCDU CIRCUIT BREAKER? REPAIR FAULTY WIRING BETWEEN DCDU AND PILOT’S CYCLIC STICK GRIP. REPAIR FAULTY WIRING BETWEEN DCDU CB AND PILOT’S CYCLIC STICK GRIP. YES REMOVE AND REPLACE DCDU. IS 28 VDC PRESENT ON BUS SIDE OF DCDU CIRCUIT BREAKER? TROUBLESHOOT NO. 1 DC BUS. (TASK 9-4.1) YES YES YES NO NO NO NO NO YES REMOVE AND REPLACE FAULTY DCDU CIRCUIT BREAKER. END OF TASK







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