Piper PA-32RT-300T - Page 402

LANCE II SERVICE
MANUAL
10-34.
TROUBLESHOOTING.
TABLE
X-V.
ALTIMETER
Trouble
Cause
Remedy
Excessive scale error.
Excessive
pointer
oscillation.
High or low reading.
Setting knob is hard
to turn.
Inner
reference
marker
fails to move when
setting
knob
is
rotated.
Setting
knob set
screw
.loose or missing.
Cracked or loose
cover glass.
Improper calibration
adjustment.
Defective mechanism.
Improper venting.
Wrong
lubrication
or
lack of lubrication.
Out of engagement.
Not tight when
altimeter was reset.
Case gasket hardened.
Replace
instrument.
Replace
instrument.
Eliminate
leak
in
static pressure
system
and check alignment of
airspeed tube.
Replace
instrument.
Replace
instrument.
Tighten instrument
screw, if loose. Re-
place instrument, if
screw is missing.
Replace instrument.
Dull or discolored
markings.
Age.
Barometric scale and
reference
markers
out
of synchronism.
Barometric
scale
and
reference
markers
out
of synchronism with
pointers.
Slippage
of mating
parts.
Drift in mechanism.
Replace instrument.
Refer to latest revision
AC43.13-1A.
Revised: 7/15/81
INSTRUMENTS
2E18