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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2 7-9
In–Flight Adjustments
ROLL STABILIZATION CHECK
Once proper operation in level flight has been established, you can
verify correct roll stabilization using the procedures in table 7–5.
Step Procedure
1 Trim the aircraft for straight and level flight in smooth, clear
air over level terrain at an altitude of at least 10,000 feet
AGL.
2 Select the 50–mile range and GMAP mode.
3 Adjust the TILT control until your radar display shows a
solid band of ground returns starting at the 40–mile range
arc. See figure 7–6.
4 Place the aircraft in a 20–degree (or greater) roll to the
right. If there is little change to the arc of ground returns,
the roll stabilization is good.
5 If ground returns come in closer on the right side and go
out on the left side, the roll is understabilized. See figure
7–7.
6 If the ground returns go out on the right side and come in
closer on the left side, the roll is overstabilized. See figure
7–8.
7 If the roll is understabilized or overstabilized, you can
perform an in–flight roll gain adjustment as shown in table
7–6.
Roll Stabilization (While Turning) Check Procedure
Table 7–5