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d.   Pitch axis
j.   Barometric altitude hold test

TM-1-1520-240-MTF Army Model CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-MTF 2-77 IN-FLIGHT (CONT.) (2)   Move the cyclic stick out of detent to the right   (do   not   operate   the   centering devises release button) to generate a 20_ bank angle. Release stick back into detent. Hold turn for 60_. The newly acquired bank angle shall be held within 5_. During entry into the turn, the ball shall not be off-centered by more than one ball diameter.  When stabilized in the  turn,  the  ball  in  the  turn  and  slip indicator  shall  be  centered  within  1/2 ball width. (3)   Using cyclic stick, return aircraft to level attitude.   Aircraft   shall   hold   level   roll attitude 3_ and heading within 3_ with controls free. Repeat steps (2) and (3) banking to the left. f.   Roll beep trim — Check as follows: (1)   While    trimmed    level,    operate    the four-way (conical) switch on the control stick grip to the right to attain 20_   bank angle.    The    aircraft    shall    respond smoothly  to  beep  inputs.  The  system shall  hold  the  attitude  acquired  within 5_. (2)   Operate the four-way switch to the left to attain a 20_ left bank angle. The system shall hold this angle within 5_. (3)   Return  aircraft  to  level  trimmed  flight using the roll beep trim switch. g.   Repeat steps 4.d through 4.f first with NO. 1, then NO. 2 AFCS selected. h.   AFCS SYS SEL — BOTH. i.   Heading select test. Check as follows.







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