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P/N 13772-108

17 of 24

Cirrus Design

Section 9

SR22

Supplements

Glideslope Intercept and Tracking

1.

Begin with a reliable ILS signal selected on the NAV receiver.

2.

Select autopilot NAV and APR. Airplane must be within 50%
needle deviation of localizer centerline.

3.

Select ALT mode. Airplane must be 60% or more below the
glideslope centerline during the approach to the intercept point. If
the above conditions have existed for 10 seconds, GS mode will
arm, the GS annunciator will come on and the ALT annunciator will
remain illuminated. When glideslope intercept occurs, the ALT
annunciator will go out and the system will track the glideslope.

• Note •

If approach vectoring locates the airplane too near the
glideslope at the intercept point (usually the outer marker), the
GS mode can be manually armed by pressing the ALT button
once. Once capture is achieved, GS annunciator will come on
and ALT annunciator will go out.

Section 5 - Performance

There is no change to the airplane performance when the S-Tec
System 55X autopilot is installed.

Section 6 - Weight & Balance

There is no change to the airplane weight & balance when the S-Tec
System 55X autopilot is installed.

Section 7 - Systems Description

Autopilot

The airplane is equipped with an S-Tec System 55X two-axis
Automatic Flight Control System (Autopilot). The autopilot
programmer/computer is installed in the center console radio stack.

The autopilot roll axis uses an inclined gyro in the turn coordinator
case as the primary turn and roll rate sensor. In addition to the turn
coordinator instrument, the roll axis computer receives signals from
the HSI and the #1 NAV/GPS radio. The roll computer computes roll
steering commands for turns, radio intercepts, and tracking. Roll axis

Revision 5: 08-15-07

Содержание System 55X

Страница 1: ...in the Cirrus Design SR22 this Supplement is applicable and must be inserted in the Supplements Section Section 9 of the Cirrus Design SR22 Pilot s Operating Handbook This document must be carried in...

Страница 2: ...d and Command Altitude display and baro correction Altitude and Decision Height DH alert and Vertical Speed Hold and Command Refer to S Tec System Fifty Five X Autopilot Pilot s Operating Handbook POH...

Страница 3: ...topilot must be disengaged for missed approach go around and balked landing 4 Flaps must be set to 50 for autopilot operation in Altitude Hold at airspeeds below 95 KIAS 5 Flap deflection is limited t...

Страница 4: ...e shall be no greater than a 45 degree intercept h The ILS is flown at normal approach speeds and within any STC or TC speed constraints and as defined in this flight manual i The flaps should be exte...

Страница 5: ...P N 13772 108 5 of 24 Cirrus Design Section 9 SR22 Supplements SR22_FM09_1502A Figure 1 System 55X Altitude Selector Alerter Autopilot Computer Revision 5 08 15 07...

Страница 6: ...lfunction has been identified and corrected The autopilot may be disconnected by 1 Pressing the A P DISC Trim switch on the control yoke handle 2 Pulling the AUTOPILOT circuit breaker on Essential Bus...

Страница 7: ...heck power to turn coordinator Flashing NAV REV or APR Off navigation course by 50 needle deviation or more Use HDG mode until problem is identified Crosscheck raw NAV data compass heading and radio o...

Страница 8: ...ssing the autopilot VS button WARNING The pilot must properly monitor and control the engine power to avoid stalling the airplane in autopilot altitude hold or vertical speed modes Note Any coupled Al...

Страница 9: ...n the ALT SEL setting on the altitude selector is within 100 feet of indicated altitude on altimeter Autopilot ALT mode should remain illuminated indicating autopilot altitude hold is engaged If ALT e...

Страница 10: ...eviation needle moves left or right Note that control yokes follow direction of needle movement f Autopilot Disconnect Tests 1 Press Pilot A P DISC Trim Switch control yoke Note that the autopilot dis...

Страница 11: ...he present altitude Note Manually flying the airplane off the selected altitude will not disengage altitude hold and the autopilot will command a pitch change to recapture the altitude when the contro...

Страница 12: ...tween actual vertical speed and the selected vertical speed usually in climb The pilot should adjust power or reduce the commanded vertical speed as appropriate to remove the error Altitude Pre Select...

Страница 13: ...Positive vertical speed indicates climb and negative vertical speeds indicates descent Any vertical speed from 1 100 FPM to 16 1600 FPM is selectable Note If an altitude is selected that requires an o...

Страница 14: ...the selector knob CW to increase setting or CCW to decrease setting Only three digits are displayed for millibars for a BARO setting of 952 8 mb the display will indicate 952 and for a BARO setting of...

Страница 15: ...sh again as the airplane approaches within 300 feet of the selected altitude If the airplane s altitude deviates 300 feet from the selected altitude the chime will sound and the ALR annunciator will f...

Страница 16: ...the APR button on the autopilot programmer computer The NAV GPSS and APR annunciators will be illuminated Use HDG to accomplish a procedure turn Engage GPSS again to complete the approach VOR Tracking...

Страница 17: ...de can be manually armed by pressing the ALT button once Once capture is achieved GS annunciator will come on and ALT annunciator will go out Section 5 Performance There is no change to the airplane p...

Страница 18: ...ector will signal the autopilot to hold the selected altitude The altitude selector alerter receives uncorrected altitude data from the same altitude encoder used by the transponder In addition to the...

Страница 19: ...Indicator GPSS converts this information and sends this heading error directly to the autopilot In the GPSS mode the converter receives ground speed and bank angle digital signals that are calculated...

Страница 20: ...ll not engage if an autopilot roll mode is not engaged Altitude correction for enroute barometric pressure changes may be made by rotation of the VS knob on the autopilot programmer computer Clockwise...

Страница 21: ...coder are operating and then both the autopilot ALT and VS modes are selected The altitude selector also provides a vertical speed signal to the autopilot pitch computer that is proportional to the am...

Страница 22: ...this mode the autopilot will hold the last vertical speed selected Note It is not necessary to enter the DTA mode to change the vertical speed if vertical speed is coupled to the autopilot If this is...

Страница 23: ...or will command the autopilot to engage altitude hold Readout When the ALT button is pressed in the operate mode the SEL annunciator will go out and the display will show the baro corrected encoder al...

Страница 24: ...go out Repeated activation of the DH button alternately activates and deactivates the DH mode VS Vertical Speed At initial start up after self test pressing the Altitude Selector Alerter VS button ena...

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