THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 6
Feb 19/04
3I6
34-20-00
CHART 4
TROUBLESHOOTING TURN AND BANK INDICATOR
Trouble Cause Remedy
Pointer fails to respond. Foreign matter lodged in Replace instrument.
instrument.
Incorrect sensitivity. Out of calibration. Replace instrument.
Incorrect turn rate (electric). Out of calibration. Replace instrument.
Aircraft not in coordinated Center ball in turn.
turn.
Ball sticky. Flat spot on ball. Replace instrument.
Ball not in center when air- Instrument not level in Level instrument.
craft is correctly trimmed. panel.
Instrument will not run No power to instrument. Check circuit and repair.
(electric).
Instrument malfunction. Replace instrument.
7. Tur
n and Bank Indicator
A. Description
These airplanes are equipped with electric Turn Coordinators, which indicate both rate of turn and
rate of roll. This instrument consists of two components:
(1) An electrically driven, inclined, gyro rotor is slaved to the turn indicator (small airplane). The
spinning gyro resists change in position as the airplane moves around it. This resistance is
mechanically translated into indicator movement. If the aircraft is rolled right or left rapidly, the
small airplane will move, indicating a turn. But, if aircraft is held in a bank and opposite rudder
is applied, the small airplane will come back to zero (level) indicating no turn. When the aircraft
is established in a coordinated turn, the small airplane will remain deflected, indicating the
turn.
(2) A metal ball sealed in a curved glass tube filled with dampening fluid provides a sensitive
indication of yaw (slip/skid) and is used to maintain coordinated flight. The ball rolls freely
within the curved glass tube display on the lower instrument face. Any deflection from center
indicates the presense of side forces on the aircraft.
B. Troubleshooting
See Chart 4.
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