TM 1-1520-240-MTF
2-78
IN-FLIGHT (CONT.)
(1) Trim to level flight at 90 kts. Set the
cursor on the Pilots HSI indicator 45_ to
the right. Engage pilot’s CMD SEL
switch on the HSI mode select panel:
press the AFCS HDG switch to engage.
Helicopter shall enter into standard rate
turn and shall roll out smoothly onto the
selected heading and maintain this
heading within 5_.
(2) Depress centering release switch on
pilot’s cyclic. HDG switch shall release.
(3) Set the cursor on the pilot’s HSI 45_ to
the left. Engage HDG switch. Helicopter
shall enter into a standard rate turn to
the left and shall roll out smoothly onto
the selected heading. It shall maintain
the new heading 5_.
(4) Select CMD SEL on co–pilot’s mode
select panel. HDG switch shall release.
(5) Repeat step (1) for co-pilot’s HSI.
(6) Depress centering release switch on
co-pilot’s cyclic. HDG switch shall
release.
(7) Repeat step (3) for co-pilot’s HSI.
(8) Depress CMD SEL switch on pilot’s
mode select panel HDG switch shall
release.
(9) Engage HDG switch. Depress HDG
switch to insure it will release.
j. Barometric altitude hold test:
