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Autothrottle EPR LIM mode is initiated by pressing the EPR LIM pushbutton if autothrottle is already engaged or by selecting T.O. or T.O. FLX on the thrust rating indicator, pushing the TO/GA button on either throttle lever, and engaging the autothrottle. The airplane must be on the ground greater than 20 seconds to initiate takeoff mode. Go-around mode is also initiated by pushing either TO/GA button as for takeoff mode except airplane must be airborne or on the ground for less than 20 seconds.
Upper and lower authority limits are provided for throttle control. The autothrottle function provides upper authority limits by means of EPR limit control modes. Lower limit authority is a function of THROTTLE LOWER LIMIT switches (not operative when PMS mode is engaged). The upper limit protects against exceeding EPR limits. The lower limit prevents the throttles from being driven to the idle stops. As a general rule, when the throttles are commanded beyond either authority limit, electrical power is removed from the servo motor until a command in the opposite direction is generated. Power is also removed from the servo motor whenever the autothrottle is engaged in the CLMP mode.
Continental
Rev. 12/01/00 #29 Flight Manual
A clutch mechanism permits manual positioning of either throttle lever with minimum force without disengaging the autothrottle.
Altitude Alert System
The altitude advisory system automatically alerts the Captain and First Officer that the airplane is approaching the preselected altitude or that the airplane is deviating from a previously selected and acquired altitude. An advisory light on each altimeter provides the alert for either of the above situations.
The system processes data from the CADCs. Although the system is part of the integrated FGS, the system is independent of the autopilot or flight director functions. An altitude select knob and readout are provided on the FGCP to select desired altitude.
The alert lights will illuminate (steady) when the airplane is at the altitude alert threshold. The threshold is approximately 750 feet from the selected altitude. When within 250 feet of the selected altitude, the advisory lights will extinguish. If the airplane subsequently deviates more than 250 feet from selected altitude, the alert lights will illuminate (flashing) and a continuing series of an aural tone alternating with the spoken word “ALTITUDE” will be heard. When the airplane is again within 250 feet of selected altitude, the lights will extinguish and the aural tone and spoken word will be reset. A different desired altitude may be preselected at any time. The alert lights and aural tone / vocal annunciation can be turned off by pushing the ALT select knob full in or by selecting another altitude.
The altitude alert function will be inhibited if the flaps are extended more than 26. or if the glideslope is captured when -920 or subsequent DFGCs are installed.
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
Effective for Some Airplanes
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
AUTOMATIC FLIGHT – CONTROLS AND INDICATORS
Autopilot And Flight Director
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT – CONTROLS AND INDICATORS
Autopilot And Flight Director
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOPILOT AND FLIGHT DIRECTOR
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
PERFORMANCE MANAGEMENT SYSTEM
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
PERFORMANCE MANAGEMENT SYSTEM
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
AUTOTHROTTLE
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
FLIGHT MODE ANNUNCIATOR
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
FLIGHT MODE ANNUNCIATOR
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
FLIGHT MODE ANNUNCIATOR
AUTOMATIC FLIGHT - CONTROLS AND INDICATORS
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