Rate Of Climb Troubleshooting - Piper PA-44-180 SEMINOLE Maintenance Manual

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