Garmin Cirrus Perspective SR20, Руководство по линейному обслуживанию

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Cirrus Perspective™ Line Maintenance Manual Page 3-5
190-00920-00 Rev. E
3.2.3 Manual Electric Pitch Trim
When the autopilot is not engaged the pitch trim motor may be used to provide a Manual
Electric Pitch Trim (MEPT) function. This allows the pilot or co ‐ pilot to adjust pitch trim from the
PITCH TRIM switch on the control stick. The MEPT trim command is routed through the GIA
63Ws where the trim speeds are scheduled to provide easier control over a wide speed or
configuration range. In manual mode, the MEPT is routed through the GTA 82. Activation of the
MEPT (or Manual Electric Roll Trim) does not disengage the Autopilot.
3.2.4 Yaw Damper
The yaw damper reduces Dutch roll tendencies and coordinates turns. It can operate
independently of the autopilot and may be used during normal hand ‐ flight maneuvers. A GSA
80 servo provides the control surface interface and the mode selection occurs via the GMC 705
controller.
3.3 S ‐ TEC 55X/55SR AUTOPILOT
The Perspective™ System can interface with the S ‐ TEC 55X/55SR Autopilot to provide the
following information to the System 55X/55SR for normal operation of the autopilot:
•
Cross ‐ track deviation
•
Navigation flag
•
Localizer Tuned state
•
Heading error
•
Course error
•
Glideslope deviation
•
Glideslope flag
•
Pre ‐ selected altitude
•
Baro ‐ corrected altitude
•
GPS Steering
The interface will allow the Perspective™ System to obtain and respond to, as needed, the
following information from the S ‐ TEC 55X/55SR:
1. Annunciations: All annunciations that would normally be made available to the S ‐ TEC
Remote Annunciator.
2. Altitude Information Requests: All requests for pre ‐ selected altitude and baro ‐
corrected altitude that would normally be provided to the S ‐ TEC SA ‐ 200 Altitude
Selector Alerter.
In the case of the GFC 700, both of the GIAs communicate to the servos through RS ‐ 485. In the
case of the S ‐ TEC autopilot, the #2 GIA outputs analog HSI signals to the S ‐ TEC 55X/55SR, along
with ARINC 429 roll steering, altitude data, and digital selected altitude data.