Pull ALT SET knob to engage altitude preselect mode. Observe ALT is
displayed in the ARM FMA’s.
Note: Altitude preselect mode provides automatic capture of a preselected altitude. The flight guidance system may be in any available pitch mode.
Approximately 750 feet from the preselected altitude, a steady amber light on each primary altimeter will come on. The light will go off when 250 feet from selected altitude. When capture threshold is reached, ALT CAP mode will engage and Pitch Profile Readout will read existing vertical speed. When ALT HLD mode engages, the Pitch Profile Readout will display zeros.
Deviation greater than 250 feet above or below the selected altitude causes alt advisory lights to flash, and a two-second tone to sound. Selecting a new reference altitude or flying back to within 250 feet of the selected altitude will extinguish the flashing lights and silence the tone warning.
The altitude preselect mode will disarm if the turbulence mode is selected, the glideslope is captured or if in the localizer only approach mode below 1500 feet AGL.
AUTOMATIC AUTOTHROTTLE MODE CHANGE
During climb, before reaching preselected altitude:
SPD MACH Readout ...........................................................................SET
Rotate SPD MACH select knob until desired speed or Mach is displayed in
SPD Mach Readout.
Note: When ALT CAP mode engages, the autothrottle system will automatically switch from EPR / CL mode to the airspeed or mach displayed in the primary SPD MACH Readout.
Pressing the ALT HLD button or selecting ALT HLD mode by rotation of the pitch select wheel will also cause automatic switching from EPR mode to SPD / MACH mode.
If primary SPD / MACH display is not as desired for cruise prior to ALT CAP mode engagement:
SPD / MACH Knob......................................................PUSH / RELEASE
Observe new primary display.
Continental
Rev. 12/01/00 #29 Flight Manual
FLIGHT DIRECTOR / AUTOPILOT TURBULENCE MODE
ENG IGN Selector ........... SYS A OR SYS B / GRD START & CONTIN
TURB Mode Button..........................................................................PUSH
Note: Pitch mode annunciator displays TURB and roll annunciator displays WNG LVL. Flight director command bars provide guidance to maintain pitch profile selected in Pitch Profile Readout. The command bars command wings level. The autothrottle system will disengage and THROTTLE OFF lights will flash. Pushing ATS disconnect button (on throttle) will turn off lights. FAST / SLOW indicates display deviation from reference airspeed displayed in SPD MACH Readout.
Automatic pitch trim function is inhibited when in TURB mode.
AUTO THROT Switch ....................................................................... OFF
Observe AUTO THROT switch automatically drops to OFF. Push ATS disconnect button (on throttle) to turn off flashing red THROTTLE lights.
Adjust throttles manually for desired airspeed. Change only for large airspeed variations. Do not chase airspeed.
Note: The maximum rough air speed is 285 KIAS or Mach .79, whichever is lower. Below 10,000 feet, 250 KIAS may be observed.
Do not fly less than minimum maneuvering speed for the configuration.
Yaw Damper Switch ............................................................................. ON
Verify YAW DAMP switch is in ON.
If flying flight director (autopilot off), fly attitude indicator as the primary pitch reference. Sacrifice altitude to maintain attitude. Do not chase altitude. Descend if necessary to improve buffet margin.
When turbulence mode is no longer desired, select any roll or pitch mode. Autopilot or flight director will engage into basic HDG HLD (heading hold) and ALT HLD (altitude hold) mode or VERT SPD (vertical speed).
DESCENT INITIATION VERTICAL SPEED MODE
With FD switches in ON, AP switch in ON, AUTO THROT switch on UP, and in MACH SEL mode.
ALT Readout........................................................................................SET
Rotate the ALT SET knob until level-off altitude is displayed in Alt
Readout.
Altitude Preselect Mode.....................................................................ARM
Pull ALT SET knob to engage altitude preselect mode.
SPD / MACH Knob..............................................................................SET
Rotate the SPD / MACH knob until the desired descent Mach is set. Push full in on the knob and set the indicated airspeed to be used later in the approach. Release knob and observe FMA’s display the selected Mach.
Pitch Profile Readout...........................................................................SET
Rotate pitch wheel toward AND to initiate descent until V-2500 appears in 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：MD-80 Flight Manual 麦道80飞行手册 2(142)
