Genesys S-TEC 3100 Manual

ATTITUDE
BASED NEXT-
GENERATION
AUTOPILOT
STRAIGHT
& LEVEL
RECOVERY
2-AXIS
OR 3-AXIS
OPTIONS
ENVELOPE
PROTECTION
& ALERTING
Pilot Guide
S-TEC 3100
Digital Flight Control System
Digital and Analog
Pilot Guide
S-TEC 3100 Digital and Analog_COVER.indd 1 1/25/2018 4:24:08 PM

S-TEC 3100 Digital and Analog
iRev A Nov 2018 S-TEC 3100 Digital and Analog
Pilot Operating Guide
and Reference
Digital Flight Control System
S-TEC 3100 Digital and Analog
Doc No 87325
© 2018 Genesys Aerosystems. All Rights Reserved.
Information contained in this document is subject to change without notice.
No part of this document may be reproduced in any form, or by any means,
without prior written consent of Genesys Aerosystems.
Printed in the United States of America. Genesys Aerosystems and S-TEC
logo are registered trademarks of Genesys Aerosystems. All other brand
names and trademarks are the property of their respective holders.
For service or repairs, contact an authorized Genesys Aerosystems
dealer. For product support, contact Genesys Aerosystems.
One S-TEC Way, Municipal Airport, Mineral Wells TX 76067
Phone: [phone] Fax: [phone]
www.genesys-aerosystems.com

S-TEC 3100 Digital and Analog
Rev A Nov 2018
S-TEC 3100 Digital and Analog
ii
Revision Record
Retain this record in front of guide.
Revision
Number Revision Date Notes/Pages changed, added, or deleted by current revision
1st Ed. February 2018
Rev A November 2018 Page 1-3: Added Half Bank (HB) Mode
denition to 1.6.1 Roll Axis Control.
Page 2-1: Fixed spelling error.
Page 2-4: Corrected steps 27 and 28.
Page 3-10: changed trim timings to 3
and 8 seconds in 3.1.11 Automatic Trim
Annunciations.
Page 3-11: Changed trim timings to
8 seconds in 3.1.12. Manual Trim
Annunciation.
Page 3-22: Added 3.6 Half Bank (HB)
Mode and Figure 3-39: Half Bank (HB)
Mode Switch/Annunciator.
Pages 3-22 to 3-25: Subsequent
subheading numbers and gure numbers
in Section 3 adjusted. Table of Contents
and List of Figures and Tables reect
changes.

S-TEC 3100 Digital and Analog
iiiRev A Nov 2018 S-TEC 3100 Digital and Analog
Table of Contents
Section 1 Overview
1.1. Document Organization.................................................................. 1-1
1.2. Purpose .......................................................................................... 1-1
1.3. General Control Theory .................................................................. 1-1
1.4. Analog Limitations .......................................................................... 1-2
1.5. Optional Yaw Damper..................................................................... 1-2
1.6. Principal Modes of Operation ......................................................... 1-3
1.6.1. Roll Axis Control .......................................................................... 1-3
1.6.2. Pitch Axis Control ........................................................................ 1-3
1.6.3. Yaw Axis Control.......................................................................... 1-4
1.7. Block Diagram ................................................................................ 1-4
1.8. Display Legend............................................................................... 1-5
Section 2 Pre-Flight Procedures
2.1. Power-Up Test ................................................................................ 2-1
2.2. Pre-Flight Checks ........................................................................... 2-1
Section 3 In-Flight Procedures
3.1. Normal Operating Procedures........................................................ 3-1
3.1.1. Roll Attitude (ROLL) Mode........................................................... 3-1
3.1.2. Heading (HDG) Mode.................................................................. 3-1
3.1.3. Navigation (NAV) Mode Tracking a VOR..................................... 3-2
3.1.4. GPS Steering (GPSS) Mode ....................................................... 3-4
3.1.5. Control Wheel Steering (CWS) Mode.......................................... 3-4
3.1.6. Pitch Attitude (PITCH) Mode ....................................................... 3-5
3.1.7. Indicated Airspeed (IAS) Mode.................................................... 3-6
3.1.8. Vertical Speed (VS) Mode ........................................................... 3-6
3.1.9. Altitude Hold (ALT HOLD) Mode.................................................. 3-7
3.1.10. Altitude Pre-Select Function ...................................................... 3-8
3.1.11. Automatic Trim Annunciations.................................................. 3-10
3.1.12. Manual Trim Annunciations ......................................................3-11
3.1.13. Manual Electric Trim.................................................................3-11
3.2. Precision Approach Procedures ....................................................3-11
3.2.1. Straight-In ILS Approach ............................................................3-11
3.2.2. ILS Approach with Procedure Turn............................................ 3-13
3.3. Non-Precision Approach Procedures ........................................... 3-13
3.3.1. Straight-In Back Course Approach ............................................ 3-13
3.3.2. Straight-In LOC Approach ......................................................... 3-14
3.3.3. LOC Approach with Procedure Turn.......................................... 3-15

S-TEC 3100 Digital and Analog
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S-TEC 3100 Digital and Analog
iv
3.3.4. GPS Steering (GPSS) RNAV Approach .................................... 3-18
3.4. Level (LVL) Mode ......................................................................... 3-20
3.4.1. Emergency Level Mode............................................................. 3-20
3.5. Yaw Damper (YD) Mode............................................................... 3-21
3.6. Half Bank (HB) Mode.................................................................... 3-22
3.7. Flight Director (FD) Operation ...................................................... 3-22
3.7.1. AP and FD Modes Engaged...................................................... 3-22
3.7.2. FD Mode Engaged and AP Mode Disengaged.......................... 3-23
3.8. Go-Around (GA) Button................................................................ 3-23
3.9. Menu (MNU) Button...................................................................... 3-24
3.10. Automatic Trim Disable............................................................... 3-25
3.11. Autopilot Disconnect ................................................................... 3-25
3.12. Maintenance Mode ..................................................................... 3-25
Section 4 EFIS Integration Options
4.1. Pre-Flight Checks ........................................................................... 4-1
4.2. Indicated Airspeed (IAS) Mode....................................................... 4-1
4.3. Vertical Speed (VS) Mode .............................................................. 4-1
4.4. Altitude Hold (ALT HOLD) Mode..................................................... 4-2
Section 5 Emergency Procedures
5.1. Automatic Trim Disable................................................................... 5-1
Section 6 Operating Parameters
6.1. Roll Axis Limits ............................................................................... 6-1
6.2. Pitch Axis Limits.............................................................................. 6-1
Section 7 Glossary

S-TEC 3100 Digital and Analog
vRev A Nov 2018 S-TEC 3100 Digital and Analog
List of Figures and Tables
Figure 1-1: S-TEC 3100 Without Optional Yaw Damper ........................ 1-2
Figure 1-2: Block Diagram (With Optional Yaw Damper) ....................... 1-4
Figure 1-3: Display Legend .................................................................... 1-5
Table 3-1: Roll Attitude (ROLL) Mode..................................................... 3-1
Figure 3-1: Roll Attitude (ROLL) Mode ................................................... 3-1
Table 3-2: Heading (HDG) Mode ............................................................ 3-2
Figure 3-2: Heading (HDG) Mode .......................................................... 3-2
Table 3-3: Navigation (NAV) Mode ......................................................... 3-2
Figure 3-3: Navigation (NAV) Mode........................................................ 3-3
Figure 3-4: Heading Mode Engaged, Navigation Mode Armed .............. 3-3
Figure 3-5: NAV GPSS ........................................................................... 3-4
Figure 3-6: APR GPSS ........................................................................... 3-4
Figure 3-7: Control Wheel Steering (CWS) Mode .................................. 3-5
Table 3-4: Pitch Attitude (PITCH) Mode.................................................. 3-5
Figure 3-8: Pitch Attitude (PITCH) Mode ................................................ 3-5
Table 3-5: Indicated Airspeed (IAS) Mode.............................................. 3-6
Figure 3-9: Indicated Airspeed (IAS) Mode ............................................ 3-6
Table 3-6: Vertical Speed (VS) Mode ..................................................... 3-7
Figure 3-10: Vertical Speed (VS) Mode.................................................. 3-7
Table 3-7: Altitude Hold (ALT HOLD) Mode............................................ 3-8
Figure 3-11: Altitude Hold (ALT HOLD) Mode......................................... 3-8
Figure 3-12: Target Altitude in Ft. with ALT HOLD Mode Armed............. 3-9
Figure 3-13: Vertical Speed in Units of FPM .......................................... 3-9
Figure 3-14: ALT HOLD CAP Mode...................................................... 3-10
Figure 3-15: Pitch Trim Annunciations - UP.......................................... 3-10
Figure 3-16: Pitch Trim Annunciations - DOWN ................................... 3-10
Figure 3-17: Manual Electric Trim..........................................................3-11
Table 3-8: Straight-In ILS Approach.......................................................3-11
Figure 3-18: APR LOC and ALT HOLD Modes Engaged, GS Mode Armed.
.............................................................................................................. 3-12
Figure 3-19: APR LOC and GS CAP Modes Engaged......................... 3-12
Figure 3-20: APR LOC and GS Modes Engaged ................................. 3-12
Figure 3-21: Straight-In ILS Approach .................................................. 3-13
Table 3-9: Straight-In Back Course Approach ...................................... 3-13
Figure 3-22: REV Mode........................................................................ 3-14
Figure 3-23: Back Inbound LOC Course Procedure............................. 3-14
Table 3-10: Straight-In LOC Approach.................................................. 3-14
Figure 3-24: APR LOC Mode................................................................ 3-15
Figure 3-25: Straight-In LOC Approach ................................................ 3-15
Table 3-11: LOC Approach with Procedure Turn .................................. 3-16
Figure 3-26: LOC Approach with Procedure Turn ................................ 3-16
Figure 3-27: HDG Mode ....................................................................... 3-17

S-TEC 3100 Digital and Analog
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Figure 3-28: APR LOC Mode Armed .................................................... 3-17
Figure 3-29: RNAV Approach Procedure.............................................. 3-18
Figure 3-30: GPSS and Pitch Modes Engaged.................................... 3-18
Figure 3-31: GPSL and ALT HOLD Modes Engaged ........................... 3-19
Figure 3-32: GPSV CAP Mode Engaged ............................................. 3-19
Figure 3-33: GPSV Mode Engaged...................................................... 3-20
Figure 3-34: Level Mode, Roll and Pitch Hold Modes .......................... 3-20
Figure 3-35: LVL Mode; Servos Engaged, No AP ................................ 3-21
Figure 3-36: Without Optional Yaw Damper Installed........................... 3-21
Figure 3-37: YD Mode Engaged........................................................... 3-21
Figure 3-38: YD Mode Disengaged...................................................... 3-22
Figure 3-39: Half Bank (HB) Mode Switch/Annunciator ....................... 3-22
Figure 3-40: AP and FD Modes Engaged............................................. 3-23
Figure 3-41: FD Mode Engaged, AP Mode Disengaged ...................... 3-23
Figure 3-42: Go-Around (GA)............................................................... 3-24
Figure 3-43: Mute Icons........................................................................ 3-24
Figure 3-44: Unmute Icon..................................................................... 3-25

Section 1 Overview
1-1Rev A Nov 2018 S-TEC 3100 Digital and Analog
Section 1 Overview
1.1. Document Organization
Section 1 Overview
Section 2 Pre-Flight Procedures
Section 3 In-Flight Procedures
Section 4 EFIS Integration Options
Section 5 Emergency Procedures
Section 6 Operating Parameters
Section 7 Glossary
1.2. Purpose
This pilot guide provides pre-ight and in-ight operating procedures for the
S-TEC 3100 autopilot (AP) for both digital and analog interfaced systems.
NOTE:
This pilot guide must be carried in the aircraft (A/C) and available to
the pilot at all times. It can only be used in conjunction with the Federal
Aviation Administration (FAA) approved Aircraft Flight Manual (AFM)
or Aircraft Flight Manual Supplement (AFMS). Refer to the applicable
AFM or AFMS for A/C specic information, such as unique ground tests,
limitations, and emergency procedures.
The S-TEC 3100 is designed to assist pilots with cockpit workload
management. The ability of the AP to provide optimum assistance
and performance is directly proportional to the pilot’s knowledge of its
operating procedures. Therefore, it is highly recommended that the pilot
develop a thorough understanding of the AP, its modes, and operating
procedures in visual meteorological conditions (VMC) prior to using it
under instrument ight rules (IFR).
1.3. General Control Theory
The S-TEC 3100 is capable of being a two- or three-axis attitude-based
digital ight control system. It is comprised of a computer/programmer,
which performs input/output processing and control laws, with an integrated
bezel/display for mode selection and display, including trim annunciations.

Section 1 Overview
Rev A Nov 2018
S-TEC 3100 Digital and Analog
1-2
S-TEC servos are coupled to the control system. The roll servo is coupled
to the ailerons; the pitch servo is coupled to the elevator; the trim servo is
coupled to the elevator trim; and the optional yaw servo is coupled to the
rudder.
The AP senses roll attitude, roll rate, heading error, and course deviation to
control the roll servo.
The AP senses pitch attitude, pitch rate, pressure altitude, indicated
airspeed (IAS), vertical speed (VS), vertical acceleration, and glideslope
deviation to control the pitch servo.
With the optional yaw control, the AP senses yaw rate and acceleration to
control the yaw servo.
The AP senses an out of trim condition whenever the trim sensor in the
pitch servo is activated. In response to this, the AP drives the trim servo in
the proper direction until the A/C is in trim.
The AP also includes an altitude pre-select function, if enabled.
1.4. Analog Limitations
The S-TEC 3100 relies on digital air data information for advanced functions
such as altitude pre-select. For analog congurations altitude hold is
available, but the ALT target is not selectable.
1.5. Optional Yaw Damper
Some aircraft congurations will 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

Section 1 Overview
1-3Rev A Nov 2018 S-TEC 3100 Digital and Analog
1.6. Principal Modes of Operation
1.6.1. Roll Axis Control
Autopilot (AP) Mode:Engages roll servo
Flight Director (FD) Mode:Laterally drives steering command bars
Roll Attitude (ROLL) Mode:Holds roll attitude
Heading (HDG) Mode:Turns onto a selected heading and holds it
Navigation (NAV) Mode:Intercepts and tracks a VOR course
Approach (APR) Mode:Intercepts and tracks a LOC front course or GPS
approach inbound
Reverse (REV) Mode: Intercepts and tracks a LOC back course (BC)
inbound or tracks a LOC front course outbound
Control Wheel Steering (CWS) Mode:Captures and holds new roll
attitude, pitch attitude, indicated airspeed, vertical speed, or altitude
GPS Steering (GPSS) Mode:Laterally steers along a ight plan course
dened by GPS/FMS
GPS Lateral Navigation (GPSL) Mode: Laterally steers along an approach
course dened by GPS/FMS approach
Level (LVL) Mode:Returns A/C to wings level attitude from any condition
Half Bank (HB) Mode:Reduces commands in HDG and GPS/FMS steering
by half
Go-Around (GA) Mode:Disengages AP and/or engages FD in ROLL
wings-level mode
1.6.2. Pitch Axis Control
Autopilot (AP) Mode:Engages pitch servo
Flight Director (FD) Mode:Vertically drives steering command bars
Pitch Attitude (PITCH) Mode:Holds pitch attitude
Indicated Airspeed (IAS) Mode:Holds indicated airspeed
Vertical Speed (VS) Mode:Holds vertical speed
Altitude Hold (ALT HOLD) Mode:Holds altitude