s-tech alitude selector & alert poh

7/27/2019 S-Tech Alitude Selector & Alert POH

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S-TEC

Pilots Operating Handboo


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2nd Ed. Jan 15, 08 i

STEC

List of Effective Pages * Asterisk indicates pages changed, added, or deleted bycurrent revision.

Record of Revisions Retain this record in front of handbook. Upon receipt of arevision, insert changes and complete table below.

Revision Number Revision Date Insertion Date/Initials

1 st Ed. Oct 26, 002nd Ed. Jan 15, 08


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2nd Ed. Jan 15, 08 iii

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Table of ContentsSec. Pg.

1 Overview...........................................................................................................11

1.1 Document Organization....................................................................13

1.2 Purpose..............................................................................................13

1.3 General Control Theory....................................................................13

1.4 Block Diagram....................................................................................14

2 Pre-Flight Procedures...................................................................................21

2.1 Pre-Flight Test....................................................................................23

3 In-Flight Procedures......................................................................................31

3.1 Selector / Alerter Operation..............................................................33

3.1.1 Data Entry.............................................................................33

3.1.2 Barometric (BARO) Calibration.......................................33

3.1.3 Altitude (ALT) Select...........................................................34

3.1.4 Vertical Speed (VS) Select.................................................35

3.1.5 Decision Height (DH) Select............................................37

3.1.6 Altitude Alerter (ALR) Function..........................................37

3.1.7 Loss of Encoded Altitude..................................................38

3.1.8 Selector / Alerter Disconnect............................................38

3.2 Autopilot Operation............................................................................39

4 Operating Parameters..................................................................................41

4.1 Ranges.................................................................................................43

5 Glossary...........................................................................................................51


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List of FiguresFig. Pg.

11 ST-360 ALT / VS Selector / Alerter Block Diagram......................................15

21 Selector / Alerter Display, All Segments and Annunciations Appear.......24

22 Selector / Alerter Display, Enter Barometric Correction............................24

31 Selector / Alerter Display, Loss of Encoded Altitude..................................38

List of TablesTable Pg.

21 Pre-Flight Test...............................................................................................23


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2nd Ed. Jan 15, 08 1-1

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SECTION 1OVERVIEW


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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-Flightoperating procedures for the S-TEC ST-360 Altitude (ALT) / Vertical Speed (VS)Selector / Alerter.

Note:

T h i s P O H m u s t b e c a r r i e d i n t h e A / C a n d m a d e a v a i l a b l e t o t h e p i l o t a t a l l ti m e s . I t c a n o n l y b e u s e d i n c o n j u n c t i o n w i t h t h e F e d e r a l Av i a t i o n Adm inis t ra t ion (FAA) approved Aircraf t F l ight Manual (AFM) or Aircraf t F l i gh t M a n u a l S u p p l e m e n t ( A F M S ). R e f e r to t h e a p p l i c a b l e A F M o r A F M S f o r A / C s p e c i f i c i n f o r m a t i o n , s u c h a s u n i q u e g r o u n d t e s t s , l i m i t a t i o n s , a n d e m e r g e n c y p r o c e d u r e s .

Note :

The Selec tor / Aler ter i s a tool provid ed to a i rcraf t owners , tha t serves to a s s i s t th e m w i t h c o c k p i t w o r k l o a d m a n a g e m e n t . T h e ab i l i t y o f t h e S e l e c t o r / A l e r t e r t o p r o v i d e o p t i m u m a s s i s t a n c e a n d p e r f o r m a n c e i s d i r ec t ly p rop o r t i ona l t o t he p i l o t ' s kno wledge o f i t s o pe ra ti ng p roc edu r e s .T h e r ef o r e , it i s h i g h l y r e c o m m e n d e d t h a t t h e p i l o t d e v e l o p a t h o r o u g h u n d e r s t a n d i n g o f t h e S e l e c t o r / A l e rt e r a n d i t s o p e r a t i n g p r o c e d u r e s i n Visual Meteorolo gica l Condi t io ns (VMC), pr ior to us in g i t under Ins t rument Fligh t Rules (IFR).

1.3 General Control Theory

The Selector / Alerter can be used with the following S-TEC autopilots:

System Fifty Five X

System Sixty Two

System Sixty Five

Pitch Stabilization System (PSS)


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The Encoding Altimeter / Blind Encoder sends the encoded alti tude to theSelector / Alerter. The encoded altitude must be converted to the true altitude,through barometric calibration.

The selected altitude and selected vertical speed must be programmed into theSelector / Alerter. Thereafter, upon engaging the autopilot's vertical speed modeand arming its altitude hold mode, the aircraft will attain and hold the selectedvertical speed. As the aircraft approaches the selected altitude, a scheduledreduction in the selected vertical speed will automatically occur. This enablesthe aircraft to transition from vertical flight to altitude capture, without adverseacceleration. Once the selected altitude has been captured, the autopilot'svertical speed mode will disengage and its altitude hold mode will engage. The

aircraft will then hold the selected altitude.1.4 Block Diagram

The Selector / Alerter Block Diagram is shown in Fig. 1-1.


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Fig. 1-1. ST-360 ALT / VS Selector / Alerter Block Diagram


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SECTION 2PRE-FLIGHT PROCEDURES


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ACTION RESPONSE

1. Set Battery Master Switch to ONposition.

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2. Set Avionics Master Switch to ONposition.

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3. Set Transponder Master Switch toON position.

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4. Set Encoding Altimeter / BlindEncoder Master Switch to ONposition.

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5. Set Autopilot Master Switch to ONposition. ------

6. Complete Autopilot Pre-FlightProcedures contained in respectivePOH.

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7. Set ALT Alerter Master Switch toON position.

A two-tone audible alert sounds once.

All left numeric segments, all rightpolarity / numeric segments, and allannunciations (ENT, ALT, SEL, ALR,DH, VS, BARO) appear on Selector /

Alerter display for 5 seconds, asshown in Fig. 2-1.

Thereafter, only ENT annunciationand left numeral 29.9 (barometricpressure in inches mercury) appear,along with a flashing BAROannunciation, as shown in Fig. 2-2.

2.1 Pre-Flight Test

Prior to takeoff and with engine running, perform the actions shown in Table 2-1.For each action, verify the corresponding response where applicable.

Table 2-1. Pre-Flight Test (continued on page 2-4)


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Fig. 2-1. Selector / Alerter Display, All Segments and Annunciations Appear

Fig. 2-2. Selector / Alerter Display, Enter Barometric Correction


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ACTION RESPONSE

8. Set Altimeter to posted airportelevation.

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9. Rotate Selector / Alerter Modifier Knob as required, until barometricpressure (inches of mercury) on

display matches that shown onKollsman scale of Altimeter.

------

Note:To convert barometric pressure tomillibars, press Selector / Alerter BAR switch once.

10. Press Selector / Alerter ALTswitch.

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11. Rotate Selector / Alerter Modifier Knob as required, until altitude on leftnumeric field of display is 400 feetabove airport elevation.

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12. Press Selector / Alerter VSswitch.

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13. Rotate Selector / Alerter Modifier Knob as required, until vertical speedpolarity on right numeric field of display is positive (+).

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14. Press Selector / Alerter ALTswitch. ------

15. Set Heading Bug on DG or HSIunder Lubber Line.

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Note:This may not apply to the SystemSixty PSS.

Table 2-1. Pre-Flight Test (continued from page 2-3)


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ACTION RESPONSE

16. Press Autopilot HDG modeselector switch to engage headingmode.

HDG annunciation appears on Autopilot display.

Note:This may not apply to the SystemSixty PSS.

17. Press/Hold Autopilot VS modeselector switch, and then press ALTmode selector switch to engagevertical speed mode and arm altitudehold mode.

ALT and VS annunciations appear on Autopilot display.

18. Rotate Selector / Alerter Modifier Knob counter-clockwise (CCW) until

Autopilot VS annunciation isextinguished.

Selector / Alerter altitude on leftnumeric field of display is at airportelevation 100 feet.

19. Disconnect Autopilot. ------

20. Set Selector / Alerter for desiredvertical speed and altitude holdfollowing takeoff (reference section3.0).

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Table 2-1. Pre-Flight Test (continued from page 2-5)


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SECTION 3IN-FLIGHT PROCEDURES


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Suppose that the aircraft is at an initial altitude of 10,000 FT, with a selectedvertical speed of 1600 FPM climbing and a selected altitude of 11,100 FT. Thescheduled reduction in vertical speed will be as follows:

Altitude (FT) Vertical Speed (FPM)10,000 160010,100 140010,200 110010,300 100010,400 90010,500 80010,600 700

10,700 60010,800 50010,900 40011,000 300

Suppose that the aircraft is at an initial altitude of 11,100 FT, with a selectedvertical speed of 1600 FPM descending and a selected altitude of 10,000 FT.The scheduled reduction in vertical speed will be as follows:

Altitude (FT) Vertical Speed (FPM)11,100 160011,000 140010,900 110010,800 100010,700 90010,600 80010,500 70010,400 60010,300 50010,200 40010,100 300

However, there will be no scheduled reduction if the selected vertical speed is300 FPM or less.

If the newly selected altitude requires a vertical speed polarity opposite to thatpreviously selected, then the vertical speed selection will automatically changepolarity and magnitude, the latter always being 500 FPM.

Suppose that the aircraft is at an altitude of 5,000 FT, with a selected verticalspeed of 1000 FPM climbing and a selected altitude of 10,000 FT. If the selectedaltitude is subsequently changed to 4,900 FT, then the vertical speed selectionwill automatically change to 500 FPM descending (-5 on display).

Suppose that the aircraft is at an altitude of 10,000 FT, with a selected verticalspeed of 1000 FPM descending and a selected altitude of 5,000 FT. If theselected altitude is subsequently changed to 10,100 FT, then the vertical speedselection will automatically change to 500 FPM climbing (+5 on display).


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3.1.7 Loss of Encoded Altitude

Should the encoded altitude at the input of the Selector / Alerter ever be lost(i.e., interrupted), then a two-tone audible alert will sound 3 times, while thedisplayed altitude is replaced by flashing dashes as shown in Fig. 3-1.Thereafter, these dashes stop flashing but remain.

In that event, the selected altitude is no longer attainable using the Selector / Alerte r. In a ddit ion, i f the Se lector / Al er ter ha ppens to h ave vert ical s peedcommand authority as indicated on its display, then immediately press the MANswitch to revert such authority back to the autopilot.

Should the encoded altitude be subsequently restored, then the dashes will bereplaced by the displayed altitude. The Selector / Alerter can then be re-programmedfor use.

Fig. 3-1. Selector / Alerter Display, Loss of Encoded Altitude

3.1.8 Selector / Alerter Disconnect

If a Selector / Alerter malfunction is suspected, then set the ALT Alerter Master Switch to the OFF position. Do not attempt further use of the Selector / Alerter,until it has been inspected by authorized service personnel. A Selector / Alerter malfunction will not likely cause an autopilot failure.


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3.2 Autopilot Operation

Program the Selector / Alerter for the selected vertical speed and selectedaltitude. On the autopilot, press/hold the VS mode selector switch and thenpress the ALT mode selector switch, to engage the vertical speed mode and armthe altitude hold mode. The VS and ALT annunciations will appear on theautopilot display. The aircraft will attain and hold the selected vertical speed.

As the aircraft approaches the selected altitude, a scheduled reduction in theselected vertical speed will automatically occur. This enables the aircraft tocapture the selected altitude, without adverse acceleration. Once the selectedaltitude has been captured, the VS annunciation on the autopilot display will

extinguish, to indicate engagement of the altitude hold mode. The aircraft willhold the selected altitude.

Note:

With the vertical speed mode engaged and the altitude hold mode armed:

1. Pressing the ALT mode selector switch on the autopilot will engage the altitudehold mode, and disengage the vertical speed mode. Consequently, the VSannunciation will extinguish on the autopilot display. This may cause someadverse acceleration, as the autopilot works to hold the aircraft at the captured altitude.

2. Pressing the VS mode selector switch on the autopilot will disarm the altitudehold mode, but leave the vertical speed mode engaged. Consequently, the ALT annunciation will extinguish on the autopilot.


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SECTION 4OPERATING PARAMETERS


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4.1 Ranges

Altitude (ALT) Select Range

0.0 to 35.9 Thousand FT

Altitude Alerter (ALR) Function Range


Barometric (BARO) Calibration Range

27.9 to 32.0 inH g

945 to 1083 m b

Decision Height (DH) Select Range


Vertical Speed (VS) Select Range

Selector / Alerter PN 01279-PX: 1600 FPM Climbing or Descending

Selector / Alerter PN 01279-PM: 3000 FPM Climbing or Descending


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SECTION 5GLOSSARY


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Term Meaning A/C Aircraft AFM Aircraft Flight Manual AFMS Aircraft Flight Manual Supplement ALR Alerter ALT AltitudeBAR BarometricBARO BarometricCCW Counter-ClockwiseCW ClockwiseDG Directional GyroDH Decision HeightDN DownDTA DataENT Enter

FAA Federal Aviation AdministrationFL Flight LevelFPM FeetperMinuteFT FeetHDG HeadingHSI Horizontal Situation Indicator IFR Instrument Flight RulesINC IncrementinHg Inches of MercuryMAN Manualmb MillibarsMSL Mean Sea LevelPN Part Number POH Pilot's Operating HandbookPSS Pitch Stabilization SystemSEL SelectVMC Visual Meteorological ConditionsVS Vertical Speed


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One STEC WayMunicipal Airport

Mineral Wells, TX 760679236

Tel: 8008727832Fax: 9403253904www.s-tec.com

www.cobham.comSTEC PN 87110

Information contained in this document is subject to changewithout notice. 2008 S-TEC. All rights reserved. Printed inthe United States of America. S-TEC and the S-TEC logoare registered trademarks of S-TEC.

Notice: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.

s-tech alitude selector & alert poh

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