Raytheon Beech Baron E55 - Autopilot Troubleshooting Guide

’i~eechcraft
BARON
55
AND
58
SHOP MANUAL
NOTE
This
troubleshooting
guide
applies
specifically
to
the
8-7
autopilot
but,
in
general,
may
also
be
used
for
the
8-5
autopilot.
Manuals
noted
in the
Supplementary
Publications
List
in
Section
1
and
the
appropriate
test
sets
as
listed
in
those
manuals will
aid
further
in
troubleshooting
procedures.
AUTOPILOT TROUBLESHOOTING
GUIDE
Indication
Probable
Cause
Remarks
Roll
Axis
1.
Insufficient
or
excessive
vacuum
a.
Leak
in
airplane
vacuum a.
Check
all
lines and
fittings
for
(pressure)
indicated
on
airplane
(pressure)
system.
leaks, looseness,
kinks,
etc.
system
gage.
b.
Regulator
valve
improperly Adjust
as
outlined
elsewhere
in
this
adjusted,
section.
c.
Adjustable
orifice
or
regulator
Adjust
as
outlined
elsewhere
in
this
improperly
adjusted,
section.
d.
Faulty
vacuum
(pressure)
pump.
d.
Replace
pump.
e.
Ambiant air
filter
plugged,
e.
Clean
or
replace.
f.
Clogged
system
filter.
f.
Check
as
outlined
elsewhere
in
this
section and
replace
if
necessary.
2.
Airplane
hunts
or recovers
slowly
a.
Regulator
valve
improperly
a.
Adjust
as
outlined
elsewhere
in
from
turns
in
one
direction.
adjusted.
this section.
b. Loose
airplane
primaly
cables
or
b.
Check
security
of
attachment,
excessive friction
in
aileron
and/or
binding,
etc.
and
adjust
as
outlined
rudder
cables,
pulleys,
bellcranks
or
in
Section
4.
loose
servo
cables.
c.
Leak
in
servo
or
servo
lines
c.
Check
for
leaks.
d. Obstruction
in
servo
lines.
d.
Check
for
foreign
matter.
e.
Faulty
turn
coordinator
gyro.
e.
Replace
turn
coordinator.
3.
Autopilot
sluggish.
a.
Low
system
vacuum
(pressure)
a.
Check
system
filters
and
adjust
setting.
as
outlined elsewhere
in
this
in
section.
4.
Airplane
turns
continuously
on
a.
Airplane
out
of trim
or
improperly
a.
Trim
airplane
or
check
controls
basicstabilization
(controller
OFF). rigged.
for
proper
rig
as
outlined
in
Section
b.
Loose
primary
cables
or
b.
Check
security
of
attachment,
excessive
friction
in cables
system.
binding,
etc.
and
adjust
as
outlined
Loose
servo
cable.
in
Section
4.
c.
Defective
turn
coordinator
gyro,
c.
Replace
turn
coordinator
gyro.
d.
Leak
in
servo
or servo
line.
d.
Check
for
servo
or servo
line
leaks.
5.
Airplane
rate
of
turn too
fast
or a.
Improper
regulator
adjustment.
a.
Adjust regulator
as
outlined
in
too
slow,
this
section.
b. Turn
coordinator
faulty.
b.
Replace
turn
coordinator.
11-84
515