COBHAM S-TEC Twenty Pilot Operating Handbook
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COBHAM S-TEC Twenty Pilot Operating Handbook

COBHAM S-TEC Twenty Pilot Operating Handbook

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Summary of Contents for COBHAM S-TEC Twenty

  • Page 2 S–TEC * Asterisk indicates pages changed, added, or deleted by List of Effective Pages current revision. Retain this record in front of handbook. Upon receipt of a Record of Revisions revision, insert changes and complete table below. Revision Number Revision Date Insertion Date/Initials Feb 01, 00 Jun 24, 02...
  • Page 3 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...

  • Page 4: Table Of Contents

    S–TEC Table of Contents Sec. Overview......................1–1 Document Organization..............1–3 Purpose....................1–3 General Control Theory..............1–3 Modes of Operation................1–4 1.4.1 Roll Axis Control..............1–4 1.4.2 Pitch Axis Control...............1–4 Block Diagrams..................1–4 Pre-Flight Procedures...................2–1 Power-Up Test..................2–3 2.1.1 System Twenty..............2–3 2.1.2 System Thirty...............2–7 2.1.3 System Thirty ALT...............2–13 Pre-Flight Test..................2–17 2.2.1 System Twenty..............2–17 2.2.2...
  • Page 5 S–TEC 3.1.4 High Track (HI TRK) Mode, System Twenty / Thirty..3–6 3.1.4.1 LOC Course Tracking........3–6 3.1.4.2 GPS Course Tracking........3–6 3.1.4.3 VOR Course Tracking........3–6 3.1.5 Altitude Hold (ALT HOLD) Mode, System Thirty / Thirty ALT..3–7 3.1.5.1 System Thirty............3–7 3.1.5.2 System Thirty ALT..........3–8 3.1.6 Manual Elevator Trim Prompts, System Thirty / Thirty ALT..3–8 3.1.6.1 System Thirty............3–8...
  • Page 6 S–TEC Yaw Damper Operation..............3–22 3.3.1 AUTO Mode................3–22 3.3.2 ON Mode................3–22 3.3.3 Yaw Damper Trim..............3–22 Autopilot Disconnect ................3–23 3.4.1 System Twenty / Thirty............3–23 3.4.2 System Thirty ALT...............3–23 Operating Parameters..................4–1 Roll Axis Limits..................4–3 Pitch Axis Limits.................4–3 Glossary......................5–1 3rd Ed. Feb 15, 07...
  • Page 7 S–TEC List of Figures Fig. 1–1 System Twenty Block Diagram..............1–5 1–2 System Thirty Block Diagram..............1–6 1–3 System Thirty ALT Block Diagram...............1–7 1–4 Yaw Damper Block Diagram...............1–8 2–1 AP Display, Lamps Illuminated at Power-Up (System Twenty)....2–4 2–2 AP Display, All Lamps Extinguished (System Twenty)......2–4 2–3 AP Display, RDY for Operation..............2–5 2–4...
  • Page 8 S–TEC 2–20 AP Display, HI TRK Mode Engaged (System Twenty)......2–21 2–21 AP Display, ST Mode Engaged (System Thirty)........2–27 2–22 AP Display, HD Mode Engaged (System Thirty)........2–27 2–23 AP Display, LO TRK Mode Engaged (System Thirty)......2–29 2–24 AP Display, LO TRK Mode Engaged (System Thirty)......2–29 2–25 AP Display, HI TRK and ALT HOLD Modes Engaged (System Thirty)..2–31 2–26 ..2–32...
  • Page 9 S–TEC 3–14 LOC Approach with Procedure Turn (HSI)..........3–18 3–15 VOR Approach with Procedure Turn (DG)..........3–20 3–16 VOR Approach with Procedure Turn (HSI)..........3–21 3–17 Yaw Damper Master Switch................3–22 3–18 Yaw Damper Trim Knob................3–22 List of Tables Table 2–1 Power-Up Test, System Twenty..............2–3 2–2 Power-Up Test, System Thirty..............2–7 2–3...

  • Page 10: Overview

    S–TEC SECTION 1 OVERVIEW 3rd Ed. Feb 15, 07...
  • Page 11 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...

  • Page 12: Document Organization

    S–TEC 1.1 Document Organization Section 1 Overview Section 2 Pre-Flight Procedures Section 3 In-Flight Procedures Section 4 Operating Parameters Section 5 Glossary 1.2 Purpose This Pilot's Operating Handbook (POH) provides Pre-Flight and In-Flight operating procedures for the S-TEC System Twenty / Thirty / Thirty ALT Autopilot (AP).

  • Page 13: Modes Of Operation

    S–TEC The optional Yaw Damper senses excessive adverse yaw about the yaw axis, and responds by driving the yaw servo in the proper direction to provide damping. The yaw servo is coupled to the rudder. 1.4 Modes of Operation 1.4.1 Roll Axis Control Each press/release of the optional MODE SEL Switch typically located on the Control Wheel, or PUSH MODE Switch located on the bezel, successively engages the roll modes below.

  • Page 14: System Twenty Block Diagram

    S–TEC Fig. 1-1. System Twenty Block Diagram 3rd Ed. Feb 15, 07...

  • Page 15: System Thirty Block Diagram

    S–TEC Fig. 1-2. System Thirty Block Diagram 3rd Ed. Feb 15, 07...

  • Page 16: System Thirty Alt Block Diagram

    S–TEC Fig. 1-3. System Thirty ALT Block Diagram 3rd Ed. Feb 15, 07...

  • Page 17: Yaw Damper Block Diagram

    S–TEC Fig. 1-4. Yaw Damper Block Diagram 3rd Ed. Feb 15, 07...

  • Page 18: Pre-Flight Procedures

    S–TEC SECTION 2 PRE-FLIGHT PROCEDURES 3rd Ed. Feb 15, 07...
  • Page 19 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...

  • Page 20: Power-Up Test

    S–TEC 2.1 Power-Up Test 2.1.1 System Twenty Perform the actions shown in Table 2-1. For each action, verify the corresponding response where applicable. Table 2-1. Power-Up Test, System Twenty ACTION RESPONSE 1. Set Yaw Damper Master Switch to ------ OFF position (if installed). 2.
  • Page 21 S–TEC Fig. 2-1. AP Display, RDY, ST, HD, LO TRK, HI TRK Lamps Illuminated at Power-Up (System Twenty) Fig. 2-2. AP Display, All Lamps Extinguished (System Twenty) 3rd Ed. Feb 15, 07...

  • Page 22: Ap Display, Rdy For Operation

    S–TEC Fig. 2-3. AP Display, RDY for Operation (System Twenty) Fig. 2-4. AP Display, Turn Coordinator Failure (System Twenty) 3rd Ed. Feb 15, 07...
  • Page 23 S–TEC Fig. 2-5. AP Display, Low Voltage Flag (System Twenty) 3rd Ed. Feb 15, 07...

  • Page 24: System Thirty

    S–TEC 2.1.2 System Thirty Perform the actions shown in Table 2-2. For each action, verify the corresponding response where applicable. Table 2-2. Power-Up Test, System Thirty ACTION RESPONSE 1. Set Yaw Damper Master Switch to ------ OFF position (if installed). 2.
  • Page 25 S–TEC Fig. 2-6. AP Display, RDY, ALT, ST, HD, LO TRK, HI TRK, TRIM UP, TRIM DN Lamps Illuminated at Power-Up (System Thirty) Fig. 2-7. AP Display, TRIM UP Lamp Extinguished (System Thirty) 3rd Ed. Feb 15, 07...
  • Page 26 S–TEC Fig. 2-8. AP Display, ALT Lamp Only Illuminated (System Thirty) Fig. 2-9. AP Display, All Lamps Extinguished (System Thirty) 3rd Ed. Feb 15, 07...
  • Page 27 S–TEC Fig. 2-10. AP Display, RDY for Operation (System Thirty) Fig. 2-11. AP Display, Turn Coordinator Failure (System Thirty) 2-10 3rd Ed. Feb 15, 07...
  • Page 28 S–TEC Fig. 2-12. AP Display, Low Voltage Flag (System Thirty) 3rd Ed. Feb 15, 07 2-11...
  • Page 29 S–TEC Page Intentionally Blank 2-12 3rd Ed. Feb 15, 07...

  • Page 30: System Thirty Alt

    S–TEC 2.1.3 System Thirty ALT Perform the actions shown in Table 2-3. For each action, verify the corresponding response where applicable. Table 2-3. Power-Up Test, System Thirty ALT ACTION RESPONSE 1. Set Yaw Damper Master Switch to ------ OFF position (if installed). 2.
  • Page 31 S–TEC Fig. 2-13. ALT HOLD ON/OFF Switch Display, ALT ON, UP, and DN Lamps Illuminated at Power-Up (System Thirty ALT) Fig. 2-14. ALT HOLD ON/OFF Switch Display, UP Lamp Extinguished (System Thirty ALT) 2-14 3rd Ed. Feb 15, 07...
  • Page 32 S–TEC Fig. 2-15. ALT HOLD ON/OFF Switch Display, DN Lamp Extinguished (System Thirty ALT) Fig. 2-16. ALT HOLD ON/OFF Switch Display, ALT ON Lamp Extinguished (System Thirty ALT) 3rd Ed. Feb 15, 07 2-15...
  • Page 33 S–TEC Page Intentionally Blank 2-16 3rd Ed. Feb 15, 07...

  • Page 34: Pre-Flight Test

    S–TEC 2.2 Pre-Flight Test 2.2.1 System Twenty Prior to takeoff and with engine running, perform the actions shown in Table 2-4. For each action, verify the corresponding response where applicable. Table 2-4. Pre-Flight Test, System Twenty (continued on page 2-18) ACTION RESPONSE 1.
  • Page 35 S–TEC Table 2-4. Pre-Flight Test, System Twenty (continued from page 2-17) ACTION RESPONSE Set Heading Bug under Lubber ------ Line. Engage heading mode. HD lamp alone is illuminated on AP display, as shown in Fig. 2-18. 10. Turn Heading Bug to the left side A/C Control Wheel turns to the left.

  • Page 36: Ap Display, St Mode Engaged (System Twenty)

    S–TEC Fig. 2-17. AP Display, ST Mode Engaged (System Twenty) Fig. 2-18. AP Display, HD Mode Engaged (System Twenty) 3rd Ed. Feb 15, 07 2-19...
  • Page 37 S–TEC Table 2-4. Pre-Flight Test, System Twenty (continued from page 2-18) ACTION RESPONSE 18. Turn Course Pointer right until A/C Control Wheel turns to the left. CDI needle deflection is 2 dots left of center. 19. Turn Course Pointer left until CDI A/C Control Wheel stops.

  • Page 38: Ap Display, Lo Trk Mode Engaged (System Twenty)

    S–TEC Fig. 2-19. AP Display, LO TRK Mode Engaged (System Twenty) Fig. 2-20. AP Display, HI TRK Mode Engaged (System Twenty) 3rd Ed. Feb 15, 07 2-21...
  • Page 39 S–TEC Table 2-4. Pre-Flight Test, System Twenty (continued from page 2-20) ACTION RESPONSE 28. Disconnect autopilot by any one RDY lamp flashes and audible alert of the following means: sounds a periodic tone, while all other lamps are extinguished. Press optional AP DISC Switch typically located on Control Wheel.
  • Page 40 S–TEC Table 2-4. Pre-Flight Test, System Twenty (continued from page 2-22) ACTION RESPONSE 34. Turn Yaw Trim Knob fully CCW. Left A/C Rudder Pedal slowly moves forward. 35. Turn Yaw Trim Knob fully CW. Right A/C Rudder Pedal slowly moves forward. 36.
  • Page 41 S–TEC Page Intentionally Blank 2-24 3rd Ed. Feb 15, 07...

  • Page 42: Pre-Flight Test, System Thirty

    S–TEC 2.2.2 System Thirty Prior to takeoff and with engine running, perform the actions shown in Table 2-5. For each action, verify the corresponding response where applicable. Table 2-5. Pre-Flight Test, System Thirty (continued on page 2-26) ACTION RESPONSE 1. Move A/C Control Wheel left and ------ right, sense...
  • Page 43 S–TEC Table 2-5. Pre-Flight Test, System Thirty (continued from page 2-25) ACTION RESPONSE Set Heading Bug under Lubber ------ Line. Engage heading mode. HD lamp alone is illuminated on AP display, as shown in Fig. 2-22. 10. Turn Heading Bug to the left side A/C Control Wheel turns to the left.
  • Page 44 S–TEC Fig. 2-21. AP Display, ST Mode Engaged (System Thirty) Fig. 2-22. AP Display, HD Mode Engaged (System Thirty) 3rd Ed. Feb 15, 07 2-27...
  • Page 45 S–TEC Table 2-5. Pre-Flight Test, System Thirty (continued from page 2-26) ACTION RESPONSE 18. Turn Course Pointer right until A/C Control Wheel turns to the left. CDI needle deflection is 2 dots left of center. 19. Turn Course Pointer left until CDI A/C Control Wheel stops.
  • Page 46 S–TEC Fig. 2-23. AP Display, LO TRK Mode Engaged (System Thirty) Fig. 2-24. AP Display, HI TRK Mode Engaged (System Thirty) 3rd Ed. Feb 15, 07 2-29...
  • Page 47 S–TEC Table 2-5. Pre-Flight Test, System Thirty (continued from page 2-28) ACTION RESPONSE 28. Move A/C Control Wheel forward and aft, to sense its freedom of ------ movement about pitch axis. 29. Engage altitude hold mode. lamp illuminated AP display, as shown in Fig. 2-25. 30.
  • Page 48 S–TEC Fig. 2-25. AP Display, HI TRK and ALT HOLD Modes Engaged (System Thirty) 3rd Ed. Feb 15, 07 2-31...

  • Page 49: System Thirty

    S–TEC Fig. 2-26. AP Display, HI TRK and ALT HOLD Modes Engaged, TRIM UP Required (System Thirty) Fig. 2-27. AP Display, HI TRK and ALT HOLD Modes Engaged, TRIM DN Required (System Thirty) 2-32 3rd Ed. Feb 15, 07...
  • Page 50 S–TEC Table 2-5. Pre-Flight Test, System Thirty (continued from page 2-30) ACTION RESPONSE 35. Disconnect autopilot by any one RDY lamp flashes and audible alert of the following means: sounds a periodic tone, while all other lamps are extinguished. Press optional AP DISC Switch typically located on Control Wheel.
  • Page 51 S–TEC Table 2-5. Pre-Flight Test, System Thirty (continued from page 2-33) ACTION RESPONSE 41. Attempt actuation of A/C Rudder A/C Rudder Pedals’ reduced freedom Pedals alternately in succession. of movement indicates that Yaw Servo is engaged. Yaw Servo can be overridden. If not, set Yaw Damper Master Switch to OFF position, and do not use.

  • Page 52: System Thirty Alt

    S–TEC 2.2.3 System Thirty ALT Prior to takeoff and with engine running, perform the actions shown in Table 2-6. For each action, verify the corresponding response where applicable. Table 2-6. Pre-Flight Test, System Thirty ALT (continued on page 2-37) ACTION RESPONSE 1.
  • Page 53 S–TEC Fig. 2-28. ALT HOLD ON/OFF Switch Display, ALT HOLD Mode Engaged (System Thirty ALT) Fig. 2-29. ALT HOLD ON/OFF Switch Display, ALT HOLD Mode Engaged, TRIM UP Required (System Thirty ALT) Fig. 2-30. ALT HOLD ON/OFF Switch Display, ALT HOLD Mode Engaged, TRIM DN Required (System Thirty ALT) 2-36...
  • Page 54 S–TEC Table 2-6. Pre-Flight Test, System Thirty ALT (continued from page 2-35) ACTION RESPONSE 7. Move A/C Control Wheel forward Audible alert is squelched. until DN lamp is extinguished. 8. Disengage altitude hold mode. ALT ON lamp is extinguished on ALT HOLD ON/OFF Switch display.
  • Page 55 S–TEC Table 2-5. Pre-Flight Test, System Thirty ALT (continued from page 2-37) ACTION RESPONSE 16. Turn Yaw Trim Knob CCW until ------ A/C Rudder Pedals stop. 17. Set Yaw Damper Master Switch ------ to OFF position. 18. Actuate Rudder Pedals Rudder Pedals’...

  • Page 56: In-Flight Procedures

    S–TEC SECTION 3 IN-FLIGHT PROCEDURES 3rd Ed. Feb 15, 07...
  • Page 57 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...

  • Page 58: Normal Operating Procedures

    S–TEC 3.1 Normal Operating Procedures 3.1.1 Stabilizer (ST) Mode, System Twenty / Thirty Set the L/R Turn Knob under its index, and then engage the stabilizer mode. The ST lamp alone will be illuminated as shown in Fig. 3-1, to acknowledge that this mode is engaged.

  • Page 59: Heading (Hd) Mode, System Twenty / Thirty

    S–TEC 3.1.2 Heading (HD) Mode, System Twenty / Thirty Set the Heading Bug to the desired heading on the compass card (HSI or DG), and then engage the heading mode. The HD lamp alone will be illuminated as shown in Fig. 3-2, to acknowledge that this mode is engaged. The autopilot will turn the aircraft onto the selected heading and hold it.

  • Page 60: Low Track (Lo Trk) Mode, System Twenty / Thirty

    S–TEC 3.1.3 Low Track (LO TRK) Mode, System Twenty / Thirty Select the VOR frequency on the Navigation Receiver. Maneuver the aircraft to within ±1 CDI needle width and ±10° heading of the selected course. Engage the low track mode. The LO TRK lamp alone will be illuminated as shown in Fig.

  • Page 61: High Track (Hi Trk) Mode, System Twenty / Thirty

    S–TEC 3.1.4 High Track (HI TRK) Mode, System Twenty / Thirty 3.1.4.1 LOC Course Tracking Select the LOC frequency on the Navigation Receiver. Maneuver the aircraft to within ±1 CDI needle width and ±10° heading of the selected course. Engage the high track mode.

  • Page 62: Altitude Hold (Alt Hold) Mode, System Thirty / Thirty Alt

    S–TEC 3.1.5 Altitude Hold (ALT HOLD) Mode, System Thirty / Thirty ALT 3.1.5.1 System Thirty The altitude hold mode can only be engaged if a roll mode (ST, HD, LO TRK, HI TRK) is already engaged. Maneuver the aircraft to the desired altitude. Engage the altitude hold mode.

  • Page 63: System Thirty Alt

    S–TEC 3.1.5.2 System Thirty ALT Maneuver the aircraft to the desired altitude. Engage the altitude hold mode. The ALT ON lamp will be illuminated as shown in Fig. 3-6, to acknowledge that this mode is engaged. The autopilot will hold the aircraft at its current (captured) absolute pressure altitude.

  • Page 64: Ap Display, Manual Trim Prompts (System Thirty)

    S–TEC a. TRIM UP Required b. TRIM DN Required Fig. 3-7. AP Display, Manual Trim Prompts (System Thirty) 3rd Ed. Feb 15, 07...
  • Page 65 S–TEC a. TRIM UP Required b. TRIM DN Required Fig. 3-8. ALT HOLD ON/OFF Switch Display, Manual Trim Prompts (System Thirty ALT) 3-10 3rd Ed. Feb 15, 07...

  • Page 66: Approach Procedures

    S–TEC 3.2 Approach Procedures 3.2.1 Straight-In LOC Approach 3.2.1.1 Heading System DG Select the LOC frequency on the Navigation Receiver. Set the Heading Bug to the FRONT INBOUND LOC heading, and then engage the heading mode. At the appropriate point, turn the Heading Bug to establish the aircraft on the FRONT INBOUND LOC course.

  • Page 67: Straight-In Loc Approach (Dg)

    S–TEC 1. a. Select LOC frequency. b. Set Heading Bug to FRONT INBOUND LOC heading. c. Engage heading mode. d. Turn Heading Bug to establish aircraft on FRONT INBOUND LOC course. e. Engage high track mode. f. Track FRONT INBOUND LOC course. 2.

  • Page 68: Straight-In Loc Approach (Hsi)

    S–TEC 1. a. Select LOC frequency. b. Set Course Pointer to FRONT INBOUND LOC course (reference only). c. Set Heading Bug to FRONT INBOUND LOC heading. d. Engage heading mode. e. Turn Heading Bug to establish aircraft on FRONT INBOUND LOC course. f.

  • Page 69: Straight-In Vor Approach (Dg)

    S–TEC 1. a. Select VOR frequency. b. Set OBS to FRONT INBOUND VOR course. c. Set Heading Bug to FRONT INBOUND VOR heading. d. Engage heading mode. e. Turn Heading Bug to establish aircraft on FRONT INBOUND VOR course. f. Engage high track mode. g.

  • Page 70: Straight-In Vor Approach (Hsi)

    S–TEC 1. a. Select VOR frequency. b. Set Course Pointer to FRONT INBOUND VOR course. c. Set Heading Bug to FRONT INBOUND VOR heading. d. Engage heading mode. e. Turn Heading Bug to establish aircraft on FRONT INBOUND VOR course. f.

  • Page 71: Loc Approach With Procedure Turn

    S–TEC 3.2.3 LOC Approach with Procedure Turn 3.2.3.1 Heading System DG Select the LOC frequency on the Navigation Receiver. Set the Heading Bug to the FRONT OUTBOUND LOC heading, and then engage the heading mode. At the appropriate point, turn the Heading Bug to establish the aircraft on the FRONT OUTBOUND LOC course.

  • Page 72: Loc Approach With Procedure Turn (Dg)

    S–TEC 130° 310° 1. a. Select LOC frequency. b. Set Heading Bug to FRONT OUTBOUND LOC heading. c. Engage heading mode. d. Turn Heading Bug to establish aircraft on FRONT OUTBOUND LOC course. 2. a. Set Heading Bug to FRONT OUTBOUND PROCEDURE TURN heading. 3.

  • Page 73: Loc Approach With Procedure Turn (Hsi)

    S–TEC 130° 310° 1. a. Select LOC frequency. b. Set Course Pointer to FRONT INBOUND LOC course (reference only). c. Set Heading Bug to FRONT OUTBOUND LOC heading. d. Engage heading mode. e. Turn Heading Bug to establish aircraft on FRONT OUTBOUND LOC course. 2.

  • Page 74: Vor Approach With Procedure Turn

    S–TEC 3.2.4 VOR Approach with Procedure Turn 3.2.4.1 Heading System DG Select the VOR frequency on the Navigation Receiver. Set the OBS to the FRONT INBOUND VOR course. Set the Heading Bug to the FRONT OUTBOUND VOR heading, and then engage the heading mode. At the appropriate point, turn the Heading Bug to establish the aircraft on the FRONT OUTBOUND VOR course.

  • Page 75: Vor Approach With Procedure Turn (Dg)

    S–TEC 130° 310° 1. a. Select VOR frequency. b. Set OBS to FRONT INBOUND VOR course. c. Set Heading Bug to FRONT OUTBOUND VOR heading. d. Engage heading mode. e. Turn Heading Bug to establish aircraft on FRONT OUTBOUND VOR course. 2.

  • Page 76: Vor Approach With Procedure Turn (Hsi)

    S–TEC 130° 310° 1. a. Select VOR frequency. b. Set Course Pointer to FRONT INBOUND VOR course. c. Set Heading Bug to FRONT OUTBOUND VOR heading. d. Engage heading mode. e. Turn Heading Bug to establish aircraft on FRONT OUTBOUND VOR course. 2.

  • Page 77: Yaw Damper Operation

    S–TEC 3.3 Yaw Damper Operation The optional Yaw Damper serves to dampen excessive adverse yaw. It operates in either the AUTO mode or ON mode, depending upon the position of the Yaw Damper Master Switch shown in Fig. 3-17. AUTO Fig.

  • Page 78: Autopilot Disconnect

    S–TEC 3.4 Autopilot Disconnect 3.4.1 System Twenty / Thirty The autopilot can be disconnected by any of the following means: 1. Press optional AP DISC Switch typically located on Control Wheel. 2. Press/Hold optional MODE SEL Switch typically located on Control Wheel for 3 seconds.
  • Page 79 S–TEC Page Intentionally Blank 3-24 3rd Ed. Feb 15, 07...

  • Page 80: Operating Parameters

    S–TEC SECTION 4 OPERATING PARAMETERS 3rd Ed. Feb 15, 07...
  • Page 81 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...

  • Page 82: Roll Axis Limits

    S–TEC 4.1 Roll Axis Limits Turn Rate Piston A/C: 90% Standard Rate Turn Turboprop A/C: 75% Standard Rate Turn 4.2 Pitch Axis Limits Altitude 32,000 FT Vertical Force Due to Acceleration 0.60 g Modes For the System Thirty, the pitch mode (ALT HOLD) can only be engaged after a roll mode (ST, HD, LO TRK, HI TRK) has been engaged.
  • Page 83 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...

  • Page 84: Glossary

    S–TEC SECTION 5 GLOSSARY 3rd Ed. Feb 15, 07...
  • Page 85 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...
  • Page 86 S–TEC Term Meaning Aircraft Altitude Autopilot Course Deviation Indication Clockwise Counter–Clockwise Directional Gyro DISC Disconnect Down DSNG Disengage Engage Federal Aviation Administration Feet Global Positioning System Heading HI TRK High Track Horizontal Situation Indicator Instrument Flight Rules LO TRK Low Track Localizer Missed Approach Point Omnibearing Selector...
  • Page 87 S–TEC Page Intentionally Blank 3rd Ed. Feb 15, 07...
  • Page 88 Contact S-TEC Customer Support at 800-872-7832 for a Return Material Authorization (RMA) number prior to the return of any component for any reason. One S–TEC Way Municipal Airport Mineral Wells, TX 76067–9236 Tel: 800–872–7832 Fax: 940–325–3904 www.s-tec.com www.cobham.com S–TEC PN 8777...

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