Piper SARATOGA PA-32-301 Maintenance Manual page 370

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
TURN AND BANK INDICATOR.
The turn and bank indicator is electric. The turn portion of the indicator is a gyroscope. while the bank
portion of the indicator is a ball sealed in a curved glass tube filled with dampening fluid. There are two styles
of this unit. The first is the old style with a vertical needle in the center of the dial. This instrument reads only
the rate of turn. and unless the aircraft is turning, the needle will not move regardless of bank angle. The other
style is the turn coordinator which indicates both the rate of turn and rate of roll. With this indicator. if the
aircraft is rolled right and left rapidly, the indicator will move. indicating a turn, but if the aircraft is held in a
bank. and rudder is applied, the indicator will come back to zero indicating no turn.
CHART 3407. TROUBLESHOOTING (TURN AND BANK INDICATOR)
Trouble Cause
Remedy
Pointer fails to respond.
Incorrect sensitivity.
Incorrect turn rate
(electric).
Ball sticky.
Ball not in center when
aircraft is correctly
trimmed.
Instrument will not run
(electric).
Foreign matter lodged in
instrument.
Out of calibration.
Out of calibration.
Aircraft not in coordinated
turn.
Flat spot on ball.
Instrument not level in
panel.
No power to instrument.
Instrument malfunction.
Replace instrument.
Replace instrument.
Replace instrument.
Center ball in turn.
Replace instrument.
Level instrument.
Check circuit and repair.
Replace instrument.
-END-
34-10-08
Page 34-11
Issued: January 2, 1980
2E5