TM 1-1520-240-MTF
2-67
B HOVER (CONT.)
NOTE
During AFCS function check, insure that both the
pilot’s and copilot’s pitch and roll beep trim
switches are operational. Pilot and copilot pitch
beep trim switches can be checked on AFCS Both,
#1, or #2. The pilot and copilot roll beep trim must
be checked on each AFCS system #1 and #2.
(1) While trimmed for stabilized hover,
raise the nose of the helicopter 3_
above hover attitude, and without
retrimming
longitudinal
control
or
releasing the mag brake, return the
stick to detent. The aircraft shall return
to its approximate original pitch attitude,
with no more than one and one-half
residual oscillations and hold attitude
within 2_.
(2) Repeat test for 3_ nose-down trim
displacement.
c. PITCH BEEP TRIM Check. Check pitch
beep trim as follows:
(1) While trimmed for hover, operate the
four-way (conical) switch on the
longitudinal stick grip to forward
position. A small nose down pitch
change shall be noted.
(2) Operate the four-way switch to aft
position. A small nose up change shall
occur.
d. Roll axis test. Check roll axis response as
follows:.
(1) Trim the aircraft to a level roll attitude.
The aircraft shall hold this level attitude
within 3_.
