737 Flight Crew Operations Manual
Flight Instruments, Displays -
PFD/ND – Displays
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D6-27370-866-EGP 10.11.7
When current airspeed decreases into the minimum maneuver speed amber bar:
• airspeed readout box turns amber and flashes for 10 seconds
YK993 - YW274
(SB Changes YK981 - YK992 . Aural alert is added when SB is
completed.)
• voice alert annunciate “Airspeed Low, Airspeed Low” once
• box returns to white when airspeed is above minimum maneuver speed.
4 Maximum Operating Speed (red and black)
Bottom of the bar indicates the maximum speed as limited by the lowest of the
following:
• Vmo/Mmo
• landing gear placard speed
• flap placard speed.
5 Maximum Maneuver Speed/High Speed Buffet (amber)
When flaps are up, the bottom of the amber bar indicates the maximum maneuver
speed. This airspeed provides 1.3g maneuver capability to high speed buffet (or
an alternative approved maneuver capability set in the FMC maintenance pages).
The bar may be displayed when operating at high altitude at relatively high gross
weights.
Note: 1.3g maneuver capability occurs at 40 degrees of bank in level flight.
6 Speed Bug (magenta)
Points to the airspeed:
• manually selected in the IAS/MACH window
• indicates the FMC computed airspeed when the IAS/MACH window is
blank.
When the selected speed is off scale, the bug is parked at the top or bottom of the
tape, with only one half bug visible.
7 Current Mach/Groundspeed (white)
Indicates current Mach or groundspeed:
• displays Mach when airspeed is 0.40 Mach and above
• displays groundspeed when airspeed decreases below 0.40 Mach
• when transitioning from Mach to groundspeed or from groundspeed to
Mach, a white box shows around the numeric value for 10 seconds.
September 15, 2016
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