PFD Instrument Landing System Indications
YA613 - YA809, YC411 - YK104
Copyright . The Boeing Company. See title page for details.
10.11.22 June 1, 2005
Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual
YC153, YC154
Approach Reference
Displays the selected ILS identifier or frequency, approach front course, and ILS/DME distance.
If the tuned ILS frequencies disagree, the frequency turns amber with an amber horizontal line through it.
If the approach courses entered in the MCP disagree, the course turns amber with an amber horizontal line through it.
Localizer Pointer and Deviation Scale
The pointer:
.
indicates localizer position relative to the airplane
.
in view when the localizer signal is received
.
fills in solid magenta when within 21/2 dots from center.
Copyright . The Boeing Company. See title page for details.
Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual
The scale:
.
indicates deviation
.
in view when the localizer frequency is tuned
.
expands when the localizer is engaged and deviation is slightly more than
one–half dot.
At low radio altitudes, with autopilot engaged, the scale turns amber and the pointer flashes to indicate excessive localizer deviation.
Below 1,000 feet AGL, with LNAV engaged and LOC armed, the localizer scale turns amber and the pointer flashes if the localizer is not captured.
Each pilot’s deviation alerting system self-tests upon becoming armed at 1500 feet radio altitude. This self-test generates a two second LOC deviation alerting display on each attitude indicator.
Marker Beacon symbol
Flashes when over one of the marker beacons:
OM (cyan) - an outer marker beacon
MM (amber) - a middle marker beacon
IM (white) - an inner marker beacon.
Glide Slope Pointer and Deviation Scale
The pointer:
.
indicates glide slope position.
.
in view when the glide slope signal is received.
.
fills in solid magenta when within 21/2 dots from center.
.
not displayed when the track and the front course on the mode control
panel differ by more than 90 degrees (backcourse).
The scale:
.
indicates deviation.
.
in view when the localizer frequency is tuned.
At low radio altitudes, with autopilot engaged, the scale turns amber and the pointer flashes to indicate excessive glide slope deviation.
Each pilot’s deviation alerting system self-tests upon becoming armed at 1500 feet radio altitude. This self-test generates a two second G/S deviation alerting display on each attitude indicator.
Copyright . The Boeing Company. See title page for details.
10.11.24 March 28, 2005
Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual
Rising Runway (green with magenta stem)
Displayed when:
.
localizer signal usable and pointer is in view.
.
radio altitude is less than 2500 feet. Rises towards airplane symbol when radio altitude is below 200 feet.
Expanded Localizer Indications
Expanded Localizer Scale
Displayed when the autopilot or flight director is in LOC mode, deviation is
slightly more than one half dot and track is within 5 degrees of the MCP selected
course.
As deviation increases, the deviation pointer remains filled in solid magenta and
parks at the limit of the expanded scale. Once the deviation reaches the equivalent
of 2.4 dots from center on the standard scale, the pointer becomes unfilled.
Reverts to standard scale when out of LOC mode, and groundspeed is less than 30
knots or radio altitude is greater than 200 feet.
A rectangle equals 1/2 dot deviation.
PFD Radio Altitude Indications
YA613 - YA687, YC153, YC154
Copyright . The Boeing Company. See title page for details.
March 28, 2005 10.11.25
Flight Instruments, Displays -PFD/ND – Displays 737 Flight Crew Operations Manual
YA721 - YA809, YC411 - YK104
Radio Altitude YA613 - YA687, YC153, YC154
Displays current radio altitude:
.
displayed below 2500 feet AGL
.
box highlighted white for 10 seconds upon descent below 2500 feet
.
turns amber when below radio altitude minimums.
Radio Altitude – Round Dial YA721 - YA809, YC411 - YK104
Displayed below 2500 feet AGL:
.
digital display from 2500 to 1000 feet AGL
.
box highlighted white for 10 seconds upon descent below 2500 feet
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