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The autothrottles will provide full takeoff thrust until TO mode is cleared.
TO mode can be cleared by selecting the AP on, or by selecting another vertical mode.
GO AROUND (GA) MODE
GA mode provides pitch and lateral commands for a transition from an approach to climb out condition, when a missed approach has occurred.
GA mode is activated by pushing one of the throttle-mounted TOGA buttons, while airborne. When GA mode is selected, autopilot is disengaged and all other lateral and vertical modes are cleared. The resultant AP disengage warning may be cancelled by pressing the AP DISC switch.
The GA mode is a heading submode of ROL. GA mode will track the current heading at the time of GA selection.
GA mode will capture the preselected altitude under the following circumstances:
. If a BARO minimum was not set on the coupled PFD, GA will transition to ASEL and capture the altitude preselector;
Volume 2 Flight Crew Operating Manual Rev 3, Apr 25, 2005
. If a BARO minimum was set on the coupled PFD and the altitude preselector is at least 500 ft higher than the BARO minimum, GA will transition to ASEL and capture the altitude preselector.
Vertical GA mode generates a fixed pitch attitude of 10° whether dual or single engine.
GA mode can be cleared by selecting the AP on, or by selecting another vertical mode.
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
AUTOMATIC FLIGHT CONTROL SYSTEM
AUTOMATIC EMERGENCY DESCENT MODE (EDM) ( OPTIONAL)
The EDM mode provides vertical and lateral commands to the AFCS to descend and level the airplane in the case of flight crew incapacitation due to loss of cabin pressurization.
The EDM mode will be automatically activated when the following conditions are met:
.
The autopilot is engaged
.
The airplane pressure altitude is above 25,000 feet
.
The cabin altitude exceeds 14,500 feet.
EDM
TARGET AIRSPEED
HDG BUG 90° LEFT OF CURRENT HEADING TARGET ALTITUDE
EMERGENCY DESCENT
GF0510_019
In EDM mode the aural warning EMERGENCY DESCENT will be generated and an EMERGENCY DESCENT warning message will be posted on EICAS. Pressing the Master Warning/Caution pushbutton will mute the aural warning. The aural warning CABIN ALTITUDE will be generated if the cabin altitude exceeds 9,000 feet. Pressing the Master Warning/Caution pushbutton will mute the aural warning. If both the EMERGENCY DESCENT and CABIN ALTITUDE aural warnings are being generated a single press of the Master Warning/Caution pushbutton will mute both aural warnings.
EDM will show as the flight director (FD) vertical mode and HDG will show as the FD lateral mode on the PFDs.
The preselected altitude will be automatically set to 15,000 feet or 4500 meters. The HDG bug will be automatically set to 90° left of the current heading. Both the HDG bug and the preselected altitude may be changed by the flight crew during emergency descent mode.
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