Piper SARATOGA PA-32-301 Maintenance Manual page 364

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
CHART 3402. TROUBLESHOOTING (ALTIMETER)
Cause
Trouble
Remedy
Excessive scale error.
Excessive pointer oscil-
lation.
High or low reading.
Setting knob is hard to
turn.
Inner reference marker
fails to move when set-
ting knob is rotated.
Setting knob set screw
loose or missing.
Cracked or loose cover
glass.
Improper calibration ad-
justment.
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. Replace instrument,
if screw is missing.
Replace instrument.
Dull or discolored
markings.
Age.
Barometric scale and ref-
erence markers out of syn-
chronism.
Barometric scale and ref-
erence markers out of syn-
chronism with pointers.
Altimeter sticks at
altitude or does not change
with change of altitude.
Slippage of mating parts.
Drift in mechanism.
Water or restriction in
static line.
Replace instrument.
Reset pointers, Refer
to the latest revision of
AC 43.13-1.
Remove static lines from all
instruments, blow line clear
from cockpit to pitot head.
34-10-02
Page 34-05
Revised: September 23, 1981
2D23