CHART 3401. TROUBLESHOOTING (RATE OF CLIMB)
Trouble Cause Remedy
Pointer does not set on zero. Aging of diaphragm. Reset pointer to zero by
means of setting screw. Tap
instrument while resetting.
Pointer fails to respond. Obstruction in static line. Disconnect all instruments
connected to the static line.
clear line.
Pitot-static head frozen over.
Water in static line. Check individual instru-
ments for obstruction in
lines.
Obstruction in pitot head. Clean lines and head.
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 night. inoperative.
.
Pointer cannot be reset to Diaphragm distorted. Replace instrument.
zero.
Instrument reads very low Case of instrument or line Replace instrument.
during climb or descent. broken or Leaking.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 4 - 11 - 0 0
Page 34-03
Revised: May 15, 1989
2I21
PIPER AIRCRAFT
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