PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 20
Nov 30/06
3H20
34-20-00
6. Tur
n Coordinator
A. Description and Operation
These airplanes are equipped with an electric turn coordinator, which indicates both rate of turn and
rate of roll.
NOTE: The conventional turn and slip indicator is available as an option.
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 presence of side forces on the aircraft.
B. Troubleshooting
See Chart 5.
Trouble Cause Remedy
CHART 5
TROUBLESHOOTING TURN AND BANK INDICATOR
Pointer fails to respond. Foreign matter lodged in Replace instrument.
instrument.
Incorrect sensitivity. Out of calibration. Replace instrument.
Incorrect turn rate Out of calibration. Replace instrument.
Aircraft not in coordinated Center ball in turn.
turn. (Turn and slip indictor.)
Ball sticky. Flat spot on ball. Replace instrument.
Ball not in center when Instrument not level in panel. Level instrument.
aircraft is correctly trimmed.
Instrument will not indicate a No power to instrument. Check circuit and repair.
turn.
Instrument malfunction. Replace instrument.
To Next Page
Loading...
