TCAS Vertical Speed Tape (red)
Tape turns red to indicate vertical speed values to avoid or exit during a TCAS resolution advisory.
Vertical speed pointer is red if it is within the vertical speed tape range. Supplements TCAS resolution advisory pitch commands on the attitude indication.
Copyright . The Boeing Company. See title page for details.

10.11.36  June 1, 2005

Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual
PFD - Heading and Track Indications Heading and Track Indications– General
The heading and track indications display current FMC/ADIRS heading, track and other information.

Current Heading Pointer (white)
Indicates current heading.

Track Pointer (white)
Indicates current track.

Selected Heading (magenta)
Digital display of the selected heading bug.

Selected Heading Bug (magenta)
Indicates the heading selected on the mode control panel. If the selected heading exceeds the display range, the bug parks on the side of the compass rose in the direction of the shorter turn to the heading.

Magnetic/True Heading Annunciation (green)
Displays selected heading reference:
.
MAG indicates display is oriented relative to magnetic north

.  
TRU indicates display is oriented relative to true north; a white box is
displayed continuously around TRU

.  
transition from TRU to MAG results in a green box around MAG for 10
seconds

.  
when TRU is displayed and the airplane descends more than 2000 feet at
a descent rate greater than –800 feet per minute, an amber box is drawn
around TRU; the box flashes for 10 seconds, then turns steady amber.

Copyright . The Boeing Company. See title page for details.
Flight Instruments, Displays -PFD/ND – Displays

PFD Failure Flags
The flag replaces the appropriate display to indicate source system failure or lack of computed information.
YA613 - YA687, YC153, YC154

Distance Measuring Equipment (amber)
The DME system has failed.

Selected Speed (amber)
The selected airspeed data is invalid.

Speed Limit Flag (amber)
Displays related with stick shaker or maximum operating speed has failed:
.  
if the stick shaker warning has failed, the red and black stick shaker speed bar is removed

.  
if the maximum operating speed has failed, the red and black maximum operating speed bar is removed.

Copyright . The Boeing Company. See title page for details.
10.11.38   March 28, 2005

Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual

No V Speeds Flag (amber)
V1 (decision speed) or VR (rotation speed) has not been entered or is invalid.

Speed Flag (amber)
The speed indication is inoperative. All indication markings are removed.

Pitch/Roll Comparator Annunciation (amber)
PITCH displayed when Captain’s and F/O’s pitch angle displays differ by more
than 5 degrees.
ROLL displayed when Captain’s and F/O’s roll angle displays differ by more than
5 degrees.

The flags flash for 10 seconds then remain steady.

Radio Altitude Flag (amber)
The radio altitude display has failed.

Localizer Flag (amber)
An ILS frequency is tuned and the ILS localizer deviation display on the attitude indication has failed.

Heading Flag (amber)
Heading information failed.

Flight Path Vector Flag (amber)
FPV is selected on the EFIS control panel, but has failed. De–selection of FPV removes the flag.

Flight Director Flag (amber)
The flight director has failed.

Glide Slope Flag (amber)
An ILS frequency is tuned and the ILS glide slope deviation display on the attitude indication has failed.

Altitude Flag (amber)
The altitude display has failed.
Copyright . The Boeing Company. See title page for details.
Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual

Vertical Speed Flag (amber)
Vertical speed has failed.

Attitude Flag (amber)
The attitude display has failed.

Landing Altitude Flag (amber)
The landing altitude input is not available or invalid. YA721 - YA809, YC411 - YK104

Distance Measuring Equipment (amber)
The DME system has failed.

Selected Speed (amber)
Invalid data.
Copyright . The Boeing Company. See title page for details.
10.11.40  June 1, 2005

Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual

Speed Limit Flag (amber)
　
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