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As the aircraft nears the Selected Altitude, the flight director transitions to Selected Altitude Capture Mode, indicated by the green ‘ALTS’ annunciation flashing for up to 10 seconds.
The green ‘ALT’ annunciation flashes for up to 10 seconds upon reaching 50 feet from the Selected Altitude; the autopilot transitions to Altitude Hold Mode and levels the aircraft.
4) The autopilot flies the holding pattern after the missed approach is activated. Annunciations are displayed in the Navigation Status Box, above the AFCS Status Box.
410 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Automatic utomatic utomatic Flight Control System ystem
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Figure 7-45 Go Around/Missed Approach3412KCOSMOGALGA ModeGPS NAV Mode
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 411
Automatic utomatic utomatic Flight Control System ystem
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
7.7 AFCS Annunciationsnnunciations and Alerts
AFCS Statustatustatus Alerts
The annunciations in Table 7-6 (listed in order of increasing priority) can appear on the PFDs above the Airspeed and Attitude indicators. Only one annunciation may occur at a time, and messages are prioritized by criticality.
Figure 7-46 AFCS Status AnnunciationAFCS Status Annunciation
Alert Condition
Annunciation
Description
Rudder Mistrim Right
Yaw servo providing sustained force in the indicated direction
Rudder Mistrim Left
Aileron Mistrim Right
Roll servo providing sustained force in the indicated direction
Aileron Mistrim Left
Elevator Mistrim Down
Pitch servo providing sustained force in the indicated direction
Elevator Mistrim Up
Emergency Descent Mode
AP engaged when aircraft altitude above 30,000 ft and cabin pressurization is lost
Selected Heading set 90° left of current heading; Selected Altitude set to 15000 ft
Pitch Trim Failure
(or stuck MEPT Switch)
If AP engaged, take control of the aircraft and disengage AP
If AP disengaged, move MEPT switches separately to unstick
Yaw Damper Failure
YD control failure; AP also inoperative
Roll Failure
Roll axis control failure; AP inoperative
Pitch Failure
Pitch axis control failure; AP inoperative
System Failure
AP and MEPT are unavailable; FD may still be available
Preflight Test
Performing preflight system test; aural alert sounds at completion
Do not press the AP DISC Switch during servo power-up and preflight system tests as this may cause the preflight system test to fail or never to start (if servos fail their power-up tests). Power must be cycled to the servos to remedy the situation.
Preflight system test failed; aural alert sounds at failure
Table 7-6 AFCS Status Alerts
412 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Automatic utomatic utomatic Flight Control System ystem
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Overspeed Protectionrotection
While Pitch Hold, Vertical Speed, Flight Level Change, Vertical Path Tracking, or an altitude capture mode is active, airspeed is monitored by the flight director and pitch commands are limited for overspeed protection. Overspeed protection is provided in situations where the flight director cannot acquire and maintain the mode reference for the selected vertical mode without exceeding the certified maximum autopilot airspeed.
When an autopilot overspeed condition occurs, the Airspeed Reference appears in a box above the Airspeed Indicator, flashing a yellow ‘MAXSPD’ annunciation. Engine power should be reduced and/or the pitch reference adjusted to slow the aircraft. The annunciation disappears when the overspeed condition is resolved.
Figure 7-47 Overspeed AnnunciationAirspeed Indicator
Emergency Descent Mode (EDM)
The Cessna Citation Mustang is equipped with an Emergency Descent Mode (EDM), available during high-altitude flight while the autopilot is engaged. EDM is automatically activated when cabin pressurization is lost at altitudes above 30,000 feet MSL. Throttles should be reduced to idle and speed brakes extended to achieve a maximum rate of decent. EDM is annunciated as the AFCS Status Annunciation and the following AFCS modes are selected:
• Flight Level Change Mode with the Selected Altitude set to 15,000 feet
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Cessna Citation Mustang Pilot’Guide 2(45)
