Extra EA 400 - 907.1 Section 1 - General; 907.2 Section 2 - Operating Limitations; 907.3 Section 3 - Emergency Operating Procedures; 907.4 Section 4 - Normal Operating Procedures

Pilot’s Operating Handbook Section 907
EXTRA 500 S-TEC Yaw Trim System
907 S-TEC Yaw Trim System
907.1 Section 1 - General
The aircraft incorporates a yaw trim system that helps to
maintain zero side-slip angle, in case the autopilot is engaged
and a roll mode selected.
907.2 Section 2 - Operating Limitations
Due to the direct technical dependency on the autopilot installed
the yaw trim system limitations are already covered by the
autopilot limitations (refer to applicable Autopilot Supplement
of this Handbook).
907.3 Section 3 - Emergency Operating Procedures
In the event of abnormal operation of the yaw trim system
conduct the following procedure:
1 Manually stabilize the aircraft by application of rudder controls.
2 Press the red
AP DISC (trim interrupt) switch on the left grip of
the pilot's control wheel.
3 Place the
AUTOPILOT YAW DAMPER switch in OFF position
907.4 Section 4 - Normal Operating Procedures
907.4.a Pre-Flight
Note During system functional checks, adequate aircraft voltage
must be provided.
1 Select HDG mode on the autopilot.
2 Engage the yaw trim system by selecting
AUTOPILOT YAW
DAMPER.
3 With autopilot HDG bug centered, rotate yaw trim
potentiometer full left - left rudder pedal should slowly move
forward - repeat this step to the right.
4 Disconnect autopilot - verify controls are free.
26. January 2011
907-3