PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
Troubleshooting
9-4
Typical Problems
Some of the typical problems associated with flight control systems are
listed below. The list assumes the autopilot is engaged and is broken
down into lateral mode problems, vertical mode problems, and
problems that are common to both vertical and lateral modes.
Illustrations that show the most common lateral and vertical mode
problems are included. The list of problems and the illustrations are not
all inclusive, but are typical of the problems most often encountered.
LATERAL MODE PROBLEMS
Refer to table 9--2 and see figure 9--1 for an in--flight graphic representation
of lateral mode problems.
Mode
Problems
HDG Mode
-- Slow capture
-- Oscillates
-- Does not hold
NAV, BC or VOR APR mode;
also Localizer portion of APR
mode
-- Undershoots capture
-- Overshoots capture
-- Missed capture
-- Standoff
-- Oscillates
Lateral Mode Problems
Table 9--2
