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4.  THRUST CONTROL SYSTEM
g.   Operate the WINCH CABLE

TM-1-1520-240-MTF Army Model CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-MTF 4-8 b.   Position   scale   below   lever   knob.   Force required to move lever 4 to 5 lb. D.  WINCH OPERATIONAL TEST. 1-29. Reference: TM 55-1520-240-T 1.  Perform an operational test of the cargo hoisting system as follows: a.   With   the   APU   running,   apply   hydraulic pressure    and    electrical    power    to    the helicopter. b.   Route    the    winch    cable    in    the    hoist configuration. (Refer to TM 55-1520-240-10.) c.   Plug in the cable cutter at sta 120 or 325. d.   Check the HOIST CONT circuit breaker on the  No.  1  pdp  is  closed.  Set  the  HOIST MASTER switch REMOTE. e.   Set   the   shifting   lever   on   the   winch   to RESCUE. (If the shift lever fails to operate properly,  replace  the  winch.)  Operate  the winch   from   either   of   the   auxiliary   hoist operator’s   control   panels.   Connect   the winch  control  from  to  the  panel  using  the extension cord. f.   Press the WINCH ARMING TRIGGER and rotate  the  WINCH  CABLE  switch  to  OUT. Continue to operate the winch until it stops. Check  that  the  out-limit  switch  stops  the winch when 21/2 wraps of the first layer of cable remain on the drum. If the winch does not stop within the specified limit, readjust the out-limit switch. (Refer to TM 55-1520-240-23,    Ch.    14.)    If    the    time required to reel the cable fully OUT is not about 90 seconds, replace the winch.







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