Piper PA-32RT-300T - Page 399

LANCE
II SERVICE
MANUAL
10-26.
TROUBLESHOOTING.
TABLE
X-III.
GYRO
HORIZON
INDICATOR
Trouble
Bar
fails
to respond.
Bar
does
not
settle.
Bar
oscillates
or
shimmies
continuously.
Instrument
does
not
indicate
level
flight.
Bar
high
after
180
turn.
Instrument
tumbles
in
flight.
Cause
Insufficient
vacuum.
Filter
dirty.
Insufficient
vacuum.
Incorrect
instrument.
Defective
instrument.
Instrument
loose
in
panel.
Vacuum
too
high.
Defective
mechanism.
Instrument
not
level
in
panel.
Aircraft
out
of
trim.
Normal,
if it
does
not
exceed
1/16
inch.
Low
vacuum.
Remedy
Check
pump
and
tubing.
Clean
or replace
filter.
Check line
and pump.
Adjust
valve.
Check
part
number.
Replace.
Tighten
mounting
screws.
Adjust
valve.
Replace
instrument.
Loosen
screws
and
level
instrument.
Trim aircraft.
Reset
regulator.
Dirty
filter.
Line to
filter
re-
stricted.
Plug
missing
or loose
in
instrument.
2E15
Clean
or replace
filter.
Replace
line.
Replace
or
tighten
plug.
INSTRUMENTS
Issued:
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