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37.   Flight controls
e.   Control interlock

TM-1-1520-240-MTF Army Model CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-MTF 2-45 STARTING ENGINES (CONT.) BF* 38.   Flight  Control  Travel  Check  —  FLT  CONTR HYDRAULIC    switch    —    BOTH.    With    slow smooth  flight  control  inputs,  check  each  axis individually for smoothness of operation and full travel.  While  mixing  pitch,  roll,  and  yaw  axis control    inputs,    check    for    smoothness    of operation. Check for minimum cyclic stick travel of 7 inches forward and 4 inches aft. a.   FLT CONTR HYDRAULIC switch to NO. 1 — ON. Check as follows: (1)   NO. 2 HYD FLT CONTR caution light — ON. F (2)   FLT    CONTR    NO.    2    PRESSURE indicator — Zero $ 50psi (3)   MASTER  CAUTION  light  —  On,  then RESET. (4)   With slow smooth flight control inputs, check   each   axis   for   smoothness   of operation and full range of travel. b.   Flight Control Hydraulic switch — BOTH. F (1)   FLT CONTR HYDRAULIC PRESSURE — Check normal operating range (2)   NO. 2 HYD FLT CONTR caution light — Out. c.   FLT CONTR HYDRAULIC switch to NO. 2 — ON. Check as follows: (1)   NO. 1 HYD FLT CONTR caution light — On. F (2)   FLT CONTR NO. 1 Pressure Indicator — Zero " 50 psi. (3)   MASTER CAUTION light — Check on the RESET.







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