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nd
Edition – Rev 0
34-20
ATTITUDE AND HEATING – MAINTENANCE PRACTICE
34-20 ATTITUDE AND HEADING
DESCRIPTION AND OPERATION
This Section includes the portion of the system which uses magnetic or inertia forces to sense and
display the direction or attitude of the aircraft.
The magnetic compass is a self-contained unit requiring no external power source and installed on
the top of the windshield into the pilot primary field of view. A compass correction card is
provided.
Heading information is provided by directional gyro indicator.
An attitude indicator informs the pilot of the orientation of the aircraft relative to earth. It indicates
pitch (fore and aft tilt) and bank (side to side tilt).
The turn and bank indicator shows the rate of turn and the coordination (slip or skid) of the turn.
The rate of turn is indicated from a rate gyroscopically and the coordination of the turn is shown by
a heavy ball mounted in a curved sealed glass tube. No pitch information is provided.
Figure 4. – Heading and attitude instruments
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