Piper Navajo PA-31 Service Manual page 668

PIPER NAVAJO SERVICE MANUAL
TABLE X-II.
TROUBLESHOOTING CHART (INSTRUMENTS) (cont.)
Trouble Cause
Remedy
TURN AND BANK INDICATOR
Pointer fails to re-
spond.
Foreign matter lodged
in instrument.
Replace instrument.
No electrical circuit.
Check for voltage at
instrument.
Incorrect sensitivity.
Pointer does not set on
zero.
Misadjustment
of sen-
sitivity spring.
Gimbal and rotor as-
sembly out of balance.
Adjust by means of sen-
sitivity spring screw.
If this pulls the pointer
from zero, replace
instrument.
Replace instrument.
Pointer incorrectly set
on its staff.
Sensitivity adjustment
pulls pointer off zero.
Replace instrument.
Replace instrument.
Vibrating
pointer. Gimbal and rotor as-
sembly out of balance.
Replace instrument.
Pitted or worn pivots
or bearings.
Replace instrument.
In low temperature,
pointer
fails to respond
or does so sluggishly
and with insufficient
deflection.
Oil has become too
thick.
Insufficient bearing
clearance.
Replace instrument.
Replace instrument.
Reissued: 10/12/79
INSTRUMENTS
3E6