In-Flight Adjustments; Pitch And Roll Trim Adjustments - Honeywell PRIMUS 660 Pilot's Manual

7. In–Flight Adjustments

PITCH AND ROLL TRIM ADJUSTMENTS

R
The PRIMUS 660 is delivered from the Honeywell factory or repair
facility adjusted for correct pitch and roll stabilization and should be
ready for use. However, due to the tolerances of some vertical
reference sources, make a final adjustment whenever the radar or
vertical reference is replaced on the aircraft, or if stabilization problems
are observed in flight.
The four trim adjustments and their effects are summarized in table
7–1.
Trim
Adjustment
Roll offset
Pitch offset
Roll gain
Pitch gain
NOTE: Generally, it is recommended to perform trim adjustments only if noticeable
effects are being observed.
Pitch and Roll Trim Adjustments Criteria
A28–1146–111
REV 2
PRIMUS
Flight Condition
Straight and level
Straight and level
Constant roll angle
>20°
Constant pitch angle
>5°
Table 7–1
R
660 Digital Weather Radar System
Effect On Ground
Return Display (Over
Level Terrain)
Nonsymmetrical display
Ground displays do not
follow contour of range
arcs.
Nonsymmetrical display
Ground displays do not
follow contour of range
arcs.
In–Flight Adjustments
7-1