737 Flight Crew Operations Manual
Flight Instruments, Displays Chapter 10
PFD/ND – Primary Flight Display Section 31
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31 PFD/ND – Primary Flight DisplayPFD/ND – Primary Flight DisplayFile Hig hlight
Introduction
The Primary Flight Displays (PFDs) present a dynamic color display of all the
parameters necessary for flight path control. The displays provide the following
information:
Failure flags are displayed for airplane system failures. Displayed information is
blanked or replaced by dashes if no valid information is available to the display
system (because of out–of–range or malfunctioning navigation aids). Failure flags
are displayed when aircraft systems cannot generate a reliable display.
Flight mode annunciations are described in Chapter 4, Automatic Flight.
Airspeed
Airspeed is displayed on a tape and in a digital window on the left side of the PFD.
The current Mach number is digitally displayed below the airspeed tape when the
current Mach number is 0.40 Mach or above. Ground speed is displayed when
airspeed decreases below 0.40 Mach. An airspeed trend vector indicates predicted
airspeed in 10 seconds. Selected airspeed is displayed above the airspeed tape.
Takeoff and landing reference speeds and flap maneuvering speeds are shown
along the right edge of the airspeed tape. Maximum and minimum airspeeds are
also displayed along the right edge of the airspeed tape.
During VNAV PTH descents, a magenta bar is added along the right edge of the
speed tape that indicates the FMC target airspeed. The band is displayed only for
flaps up configurations while the “VNAV PTH” FMA is displayed.
Attitude
The attitude indication displays the airplane pitch and roll attitude referenced to
the horizon.
Pitch attitude is displayed by an airplane symbol against a pitch scale. The pitch
scale is in 2.5 degree increments.
• flight mode annunciation
• airspeed
• altitude
• vertical speed
• attitude
• steering information
• radio altitude
• instrument landing
system display
• approach minimums
• heading/track indications
• TCAS indications
• GPWS annunciations
September 30, 2011
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