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• localizer capture can occur when intercept track angle is within 120
degrees of the localizer course
Note: After localizer capture, flight director roll commands may appear
inconsistent with A/P roll maneuvers for one to two minutes.
Localizer mode can be disarmed before localizer capture by:
• pushing localizer switch a second time, or
• selecting another roll mode
Localizer mode can be deactivated after localizer capture by:
• selecting a roll mode other than LNAV
• pushing a TO/GA switch
• disengaging the autopilot and positioning both F/D switches off
2 Localizer Light
Illuminated – localizer roll mode armed or active.
3 Approach (APP) Switch
Push –
• AFDS captures and tracks localizer and captures glideslope mode upon
interception
• localizer captures when intercept track angle is within 120 degrees of
localizer course
• below 1,500 feet radio altitude, A/P systems powered by separate sources
with three A/Ps engaged
• arms, disarms, or captures localizer (LOC) as roll mode and glideslope
(G/S) as pitch mode
• displays LOC and G/S in white (armed) on PFD roll and pitch flight mode
annunciations prior to localizer and glideslope capture
• displays LOC and G/S in green (active) on both PFD roll and pitch flight
mode annunciations after each is captured
• either localizer or glideslope can be captured first
December 01, 1999
747 Operations Manual
Automatic Flight -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 4.10.13
• glideslope captures when the intercept track angle is within 80 degrees of
localizer course
• arms other A/P systems (CMD switch lights illuminated) for engagement
at localizer and glideslope capture and radio altitude less than 1,500 feet
Note: After localizer capture, flight director roll commands may appear
inconsistent with A/P roll maneuvers for one to two minutes.
Approach mode can be disarmed before localizer or glideslope capture by:
• pushing approach switch a second time, or
• selecting LOC, LNAV, or VNAV
Approach mode deselects:
• with localizer captured and glideslope armed, by selecting another roll
mode other than LNAV; selecting LOC mode initiates a localizer approach
• with glideslope captured and localizer armed, by selecting another pitch
mode other than VNAV
• after localizer and/or glideslope are captured, by selecting TO/GA mode
or disengaging autopilot and positioning both F/D switches off
4 Approach Light
Illuminated – approach modes (LOC and G/S) armed or active.
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
4.10.14 D6-30151-425
Automatic Flight -
Controls and Indicators
PFD Flight Mode Annunciations (FMAs)
Note: A/T, roll, or pitch mode changes are emphasized for 10 seconds by a green
box around the mode.
Note: An amber horizontal line displays through the affected ACTIVE pitch or
roll mode when a flight mode fault is detected.
Note: NO AUTOLAND displays on the PFD if failures cause the system to
degrade from multi-channel engage status (LAND 3 or LAND 2) to single
channel status during an autoland. The mode change is emphasized for 10
seconds by an amber box.
NO AUTOLAND also displays on PFD ifmulti-channel approach selected
but multi-channel engage status (LAND 3 or LAND 2) has not been
annunciated by 600 feet AGL. Under these conditions, flare and rollout
modes are not armed.
1 Autothrottle Modes (Active)
Displayed (green) –
• THR
• THRREF
• HOLD
• IDLE
• SPD
CMD
PFD
1 2 4
3
5
6
December 01, 1999
747 Operations Manual
Automatic Flight -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 4.10.15
2 AFDS Roll Modes (Active)
Displayed (green) –
• ATT
3 AFDS Roll Modes (Armed)
Displayed (white) –
4 AFDS Pitch Modes (Active)
Displayed (green) –
5 AFDS Pitch Modes (Armed)
Displayed (white) –
6 AFDS (Active)
Displayed (green) –
• HDG HOLD
• HDG SEL
• LNAV
• LOC
• ROLLOUT
• TO/GA
• LOC
• ROLLOUT
• LNAV
• TO/GA
• ALT
• V/S
• VNAVPTH
• VNAV SPD
• VNAVALT
• G/S
• FLARE
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