Gyro Horizon Indicator Troubleshooting - Piper PA-24 Comanche Service Manual

PIPER COMANCHE SERVICE MANUAL
11-29. Troubleshoocing.
TABLE XI-III. GYRO HORIZON INDICATOR
Trouble
eau.e
Remedy
Bar fails to respond. Insufficient vacuum.
Check pump and tubing.
Bar does not settle. Excasiw vibration. Check shock mounu.
Replace if necessary.
Bar does not settle. Insufficient vacuum.
Check line and pump.
AdjuSt valve.
Defective insmament. Replace.
Bar oscillates or shim-
Excessive vibration. Check shock mounts.
mies continuously.
Replace if necessary.
Vacuum
tOO hith.
Adjust valve.
Dcfec:rivcmechanism. Replace inStrUment.
11030 Rate Of Cirnb Indicator.
11-31. General. The rate of climb indicator measures the rate of change in static pressure when the
airplane is climb in, or dnc:endinl. By means of a pointer and dial. this instrUment will indicate the rate of
l.iCent or descent of the airplane in feet pet" minute.
11·32. Removal ADd ReplacemCftL Refer to Par.-ph 11·18 of this scttion.
11-33. TroublcshooUn,.
INSTRUMENTS
ISSUED: 8/18/72
3
87
•
•
•