CHART 3401. TROUBLESHOOTING (RATE OF CLIMB INDICATOR) (cont)
Pointer oscillates. Leaks in static lines. Disconnect all instruments
connected to the static line.
Check individual instru-
ments for leaks. Reconnect
instruments to static line
and test installation for
leaks.
Defective mechanism. Replace instrument.
Rate of climb indicates Water in static line. Disconnect static lines and
when aircraft is banked. blow out lines from cockpit
out to pitot head.
Pointer has to be set before Temperature compensator Replace instrument.
every flight. inoperative.
Pointer cannot be reset to Diaphragm distorted. Replace instrument.
zero.
Instrument reads very low Case of instrument broken Replace instrument.
during climb or descent. or leaking.
—NOTE—
When any connections in the static system are opened for
checking, system must be rechecked per F.A.R. 23.1325.
SENSITIVE ALTIMETER.
The altimeter indicates pressure altitude in feet above sea level. The indicator has three pointers. The long
pointer is read in hundreds of feet, middle pointer in thousandths of feet and short pointer in ten thousandths of
feet. A barometric pressure window is located on the right side of the indicator dial and is set by the knob
located on the lower left corner of the instrument. The altimeter consists of a sealed diaphragm that is
connected to the pointers. The instrument case is vented to the static air system. As static air pressure
decreases, the diaphragm expands, causing pointers to move.
34 - 12 - 00
Page 34 - 05
Reissued: August 1, 1986
2D13
Trouble Cause Remedy
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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