737 Flight Crew Operations Manual
Automatic Flight -
Controls and Indicators
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 4.10.11
LNAV arming criteria on the ground:
• origin runway in flight plan
• active route entered in FMC
• track of first leg within 5 degrees of runway heading
• LNAV selected prior to TO/GA.
• LNAV guidance becomes active at 50 feet AGL
YK981 - YQ456
• bank angle is limited to 8 degrees below 200 feet and 30 degrees
above 200 feet AGL.
YW273, YW274
• bank angle is limited to 15 degrees below 200 feet and 30 degrees
above 200 feet AGL.
LNAV engagement criteria in flight:
• active route entered in FMC
• within 3 NM of active route, LNAV engagement occurs with any
airplane heading
• outside of 3 NM, airplane must:
• be on intercept course of 90 degrees or less
• intercept route segment before active waypoint.
LNAV automatically disconnects for following reasons:
• reaching end of active route
• reaching a route discontinuity
• intercepting a selected approach course in VOR LOC or APP modes
(VOR/LOC armed)
• selecting HDG SEL
• loss of capture criteria.
5 VOR Localizer (LOC) Switch
Push –
• commands AFDS roll to capture and track selected VOR or LOC course
• annunciates VOR/LOC armed or engaged as roll mode and illuminates
VOR LOC switch light.
VOR LOC Mode
Pushing the VOR LOC switch selects VOR mode if a VOR frequency is tuned or
selects LOC mode if a localizer frequency is tuned.
The VOR mode provides roll commands to track selected VOR course.
The LOC mode provides roll commands to track selected localizer course along
inbound front course bearing.
September 15, 2016
To Next Page
Loading...
