TM 55-1510-222-MTF
P R O C E D U R E
T R O U B L E S H O O T I N G
R E F E R E N C E
if necessary, before fur-
ther in-flight calibration.
(6) Push off the STAB OFF
button to restore stabiliza-
tion,
(7) Pattern observed in step
(5) should not change. If
the pattern shifts either
left or right around the
second
range
marks.
ground check leveling of
the gyro and accuracy of
the horizon indicator. Use
TILT control to find exact
error.
(8) Roll the aircraft 20° right.
For perfect stabilization.
the terrain band should be
displayed throughout the
third range marks.
(9) If the terrain band shifts
to the right around the
second range marks. in-
crease tilt angle using
TILT control until pattern
is displayed throughout
the third range marks.
Note new position of
TILT control. It should
not be more than two de-
grees above that noted in
step (5).
(10) If the terrain band shifts
(in step 8) to the left
around the second range
marks, decrease tilt angle
using TILT control until
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