737-600/700/800/900 TRAINING MANUAL CDS -- EFIS - ENGINE DISPLAY CONTROL PANEL finds this as a stuck switch, and the display changes
back to fuel flow.
Multi-function Display Switches
These are the multi-function switches:
-ENG (engine)
-SYS (system).
You can use the ENG switch to select on and off the secondary engine display on the lower display unit (DU).
You can use the SYS switch select on and off the system page on the lower DU.
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CDS - EFIS - ENGINE DISPLAY CONTROL PANEL
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CDS -- PRIMARY FLIGHT DISPLAY OVERVIEW General
The primary flight display (PFD) shows these indications:
-Airspeed
-Attitude
-Altitude
-Heading
-Vertical speed
-Autoflight mode annunciations
-Flight director commands
-Landing indications
-Radio altitude
-Time critical annunciations.
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CDS - PRIMARY FLIGHT DISPLAY OVERVIEW
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ALTEON PROPRIETARY - Copyright (c) - See title page for details
CDS -- PFD - AIRSPEED INDICATIONS Airspeed Indication
The airspeed indication on the primary flight display (PFD) shows computed airspeed and other airspeed related information from other airplane systems.
Speed Tape and Current Airspeed
The speed tape shows the computed airspeed from the air data reference section of the ADIRU on a moving scale. The total displayable range is 121 knots with indices every ten knots and numerical readouts every 20 knots.
Current airspeed shows as a digital readout in the center of the speed tape. The lowest value the digital readout can show is 45 knots.
If the current airspeed is equal to or less than the minimum operating speed as derived from the stall management yaw dampers (SMYD) then the highlight box around the digital readout will be amber. It will flash for ten seconds and then stay on steady until the underspeed condition no longer exists.
Airspeed Disagree Message
If the left and right airspeed indications disagree by 5 knots or more, the IAS DISAGREE message shows at the bottom of the speed tape on both the captain's and first officer's displays. The messages are amber.
737-600/700/800/900 TRAINING MANUAL
Mach Number
Mach number shows as a digital readout below the airspeed tape when the Mach number is more than 0.4. The display does not show when the Mach number is below
0.38 or if the Mach number display fails. Mach number is displayed in white.
Speed Trend Vector
The speed trend vector shows the value of the predicted airspeed in 10 seconds based on airplane current airspeed and inertial flight path acceleration. This vector shows when the speed trend is more than 4.5 knots. The trend vector is displayed in green.
Selected Speed/Selected Mach Number
There is a selected speed bug and a digital readout. The value of the selected speed or Mach number is the value the pilot selects on the DFCS mode control panel (MCP) or the value the FMCS calculates. The bug points to the selected speed on the speed tape. The digital readout above the speed tape shows the selected speed or the selected Mach number. The selected speed bug and readout are displayed in magenta.
When the selected speed or Mach number is off the scale, only half of the bug shows at the top or the bottom of the speed tape.
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CDS -- PFD - AIRSPEED INDICATIONS Takeoff Reference Speeds
The speed tape shows these reference speed bugs for takeoff:
-Reminder for airspeed callout at 80 knots
-V1 (takeoff decision speed)
-VR (takeoff rotation speed)
-V2 (single engine climb speed)
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