ZENAIR CH2000 SERVICE MANUAL
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ALTIMETER
TROUBLESHOOTING See following table:
ALTIMETER
Trouble
Cause
Remedy
Excessive scale error.
Improper calibration adjustment.
Replace instrument.
Excessive pointer oscillation.
Defective mechanism.
Replace instrument.
High reading.
Improper venting.
Eliminate leak in static pressure
system and check alignment of
airspeed tube.
Setting knob is hard to turn.
Wrong lubrication or lack of
lubrication.
Replace instrument.
Inner reference marked fails to
move when setting
knob is rotated.
Out of engagement.
Replace instrument.
Setting knob set screw loose or
missing.
Excessive vibration.
Tighten instrument screw, if
loose. Replace instrument, if
screw is missing.
Cracked or loose cover glass.
Excessive vibration.
Replace instrument.
Dull or discolored markings.
Age.
Replace instrument.
Barometric scale and reference
markers out of synchronism.
Slippage of mating parts.
Replace instrument.
Barometric scale and reference
markers out of synchronism with
pointers.
Drift in mechanism.
Reset pointers.
PITOT STATIC SYSTEM: See Owner’s Manual, Section 7
REMOVAL OF PITOT STATIC
1. Remove the three retaining screws.
2. Remove the lines from the barbed fittings.
REINSTALL in reverse order. - Check for leaks, proper installation, operation and safety.
- Tygon splice for pitot static connection at wing root must be replaced
with new material whenever removed.
7 Jul 95
9.3
