Genesys S-TEC 3100 - Limitations; Altitude Pre-Select Limitations; Indicated Airspeed Mode (IAS) and Envelope Protection Limitations; Optional Yaw Damper (YD)

Section 1 Overview
2nd Ed Aug 2019
S-TEC 3100 Digital and Analog
1-2
Pitch Servo: Coupled to the elevator. The 3100 senses pitch attitude,
pitch rate, pressure altitude, indicated airspeed (IAS), vertical speed (VS),
vertical acceleration, and glideslope deviation to control the pitch servo.
Trim Servo: Coupled to the elevator trim. The 3100 senses an out of
trim condition whenever the trim sensor in the pitch servo is activated. In
response, the 3100 drives the trim servo in the proper direction until the
aircraft is in trim.
Yaw Servo (optional): Coupled to the rudder. The 3100 senses yaw rate
and acceleration to control the yaw servo.
The 3100 also includes an altitude pre-select function, if enabled.
1.4. LIMITATIONS
1.4.1. Altitude Pre-Select Limitations
The S-TEC 3100 relies on digital air data information for altitude pre-select.
Some congurations may not have altitude pre-select if the baro-correction
cannot be provided to the autopilot system.
1.4.2. Indicated Airspeed Mode (IAS) and Envelope Protection
Limitations
The S-TEC 3100 relies on digital air data information for indicated air
speed hold (IAS). Some congurations may not have IAS mode if indicated
airspeed data is not provided to the autopilot system.
Overspeed and underspeed protection is not be available for systems
without indicated airspeed.
1.4.3. Optional Yaw Damper (YD)
Some aircraft congurations do not have a yaw damper system installed.
In these cases, the yaw damper button is blank and the YD LED does not
illuminate under any circumstances.
Figure 1-1: S-TEC 3100 Without Optional Yaw Damper