曝光台 注意防骗
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EFFECTIVITY
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VNAV cannot be active on the ground.
V/S
In this mode, the A/P commands the airplane to climb or
descend at the MCP selected vertical speed.
ALT HLD
In this mode, the A/P commands the airplane to hold the altitude
that the airplane was at when the crew selected ALT HLD or the
MCP selected altitude.
LVL CHG
In this mode, the airplane changes altitude with the A/P and the
autothrottle (A/T). LVL CHG commands the airplane to the MCP
selected altitude at the selected airspeed. The A/P commands
airspeed and the A/T controls the thrust.
Roll and Pitch CWS
You can also engage the A/P in roll and/or pitch CWS. In CWS,
the pilot controls the airplane as if the autopilots are
disengaged. Control of the airplane is from CWS force
transducers that send signals through the FCCs to the A/P
actuators.
DFCS - OPERATION - CLIMB/CRUISE/DESCENT INTRODUCTION
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DFCS - OPERATION - CLIMB/CRUISE/DESCENT INTRODUCTION
DFCS - OPERATION - CLIMB/CRUISE/DESCENT INTRODUCTION
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General
The LNAV commands come from the FMC and guide the
airplane on the assigned flight path. When the DFCS is in the
LNAV mode, the LNAV mode annunciation shows on the FMA.
LNAV Active
To make the LNAV active, push the LNAV mode selector switch
on the MCP. These conditions must be valid for LNAV to
engage:
* LNAV is valid
* Baro corrected altitude is valid
* Data to calculate the lateral guidance command in the FMC
is valid
* The airplane heading is towards the flight path before the
next waypoint or is within 3 nm of the flight plan path.
Deselect LNAV
You can deselect LNAV if any of these conditions occur:
* Push the LNAV mode selector switch when the LNAV mode
selector switch light is on
* Set the A/P to CMD with a F/D command more than 14
degrees
* A force more than 10 pounds on the control wheel with the A/
P in CMD
* Activate another roll mode
* LNAV is not valid
* The airplane did not capture the localizer
* The airplane reaches the final waypoint or a route
discontinuity.
DFCS - OPERATION - LNAV
EFFECTIVITY
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22-11-00-085
DFCS - OPERATION - LNAV
DFCS - OPERATION - LNAV
EFFECTIVITY
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General
The crew uses the heading select mode to change the airplane
heading. The heading that the airplane will go to is the heading
value in the MCP heading indicator. The maximum bank angle
in the turn is the bank angle limit set on the MCP.
The crew can engage the HDG SEL mode when they push the
HDG SEL mode selector switch on the MCP. The DFCS
automatically goes into the HDG SEL mode when the crew
pushes the TO/GA switch for takeoff and the flight directors
come on.
These are the two ways to use the mode:
* Set heading before you push the HDG SEL mode selector
switch
* Push the HDG SEL mode selector switch and then set the
heading.
Set Heading Before Mode
Set a heading in the heading indicator and push the HDG SEL
mode selector switch. These things happen:
* HDG SEL shows on the FMA
* The airplane turns in the direction for minimum heading
change
* The airplane captures and holds the heading set on the MCP.
Select Mode Before Heading Is Set
Push the HDG SEL mode selector switch and set a heading in
the heading indicator. These things happen:
* HDG SEL shows on the FMA
* When the pilot turns the heading knob clockwise, the
airplane banks to the right
* When the pilot turns the heading knob counterclockwise, the
airplane banks to the left
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