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Engine or Fuselage Fire Flight
ELECTRICAL SYSTEM

TM-1-1520-240-CL Army CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-CL E-9 FUEL SYSTEM Aux Fuel Pump Failure 1.  FUEL QUANTITY selector switch — Check. If one or both auxiliary fuel tanks have fuel remaining: 2.  AC-DC FUEL PUMP circuit breakers — Check in. 3.  FWD   and   AFT   AUX   FUEL   PUMP   switches (affected side) — OFF. 4.  AUX FUEL PUMP switch — ON (each aux tank with fuel remaining). If AUX PRESS indicating light remains on: 5.  AUX FUEL PUMP switch(es) (inoperative pumps(s)) — OFF.  Monitor FUEL QUANTITY indicator for the affected tank. 6.  AUX    FUEL    PUMP    switch(es)    —    ON    for operative pumps or OFF for inoperative pumps. FUEL VENTING 1.  AUX FUEL PUMP switches (affected side) — OFF. 2.  Main tank (affected side) — Monitor. When 1,000 pounds of fuel remain: 3.  AUX FUEL PUMP switches — ON (monitor fuel quantity). When tank quantity reaches 1,600 pounds: 4.  AUX FUEL PUMP switches — OFF. 5.  Steps 2 through 4 — Repeat until auxiliary tanks are empty. L or R FUEL PRESS Caution 1.  XFEED  switch  —  OPEN  (above  6,000  feet PA). 2.  FUEL PUMP(S) circuit breakers — Check in. Pump(s) are operational — Proceed with step 3.







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