Piper Comanche PA-24 Service Manual page 808

PIPER COMANCHE SERVICE MANUAL
11-29. Troubleshooan,.
TABLE Xl-III. GYRO HORIZON INDICATOR
Trouble Ca .... Remedy
Bar fails to respond.
Insufficient vacuum.
Check pump and tubing
Ba .. does no, settle.
Excessive Vlbration. Check shock mounu.
Replace if nCCCSIatY
Bar do .. nor settle.
Insufficient vacuum.
Check tiDe and pum p
Adjust valve.
Defective
"lUment. Replace.
Bu oscillates or shim- Excessive vibration. Check sh.ock mountS.
mia continuously.
Replace if necessary.
Va.cuum tOO hiah. Adjust valve.
Defective mech&nism. R~lace instrUment.
11-30 Rare Of
Cimb
IneliCltor.
11-31. General. The rare of climb indicator measures the rate of change in stacie pressure when the
airplane is c:Iimblng or descending. Bv means of a pointer and dial, this instrUment will indicate the rate of
I.:iCcnt or descent of the aIrPlane in feet per minute.
II·H. Removal ADd Replacemmr. Refer
[0
Parqraph II-IS of 'his scenon.
\1·33. TroubleshooDaI.
3 G7
INSTRUMENTS
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