Boeing 787-8 - Page 502

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Automatic Flight -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
4.10.6 D615Z003-TBC
Autopilot Flight Director Roll and Pitch Controls
Push –
• arms, engages, or disarms LNAV as the roll mode
• displays LNAV as armed mode on PFD (in white) and HUD roll flight
mode annunciator. The previous engaged roll mode remains active
• LNAV engages if the airplane is above 50 feet radio altitude and:
• within 2.5 NM of the active leg
• if not within 2.5 NM of the active leg and on an intercept heading to the
active leg, remains armed then engages when approaching the active
leg
• when engaged, displays LNAV in green on the PFD and HUD roll
flight mode annunciator
• selection of LNAV with the airplane not on a heading to intercept the
active leg, displays FMC INTERCEPT HDG EICAS advisory message
• selection of LNAV when an active FMC route is not available displays NO
ACTIVE ROUTE in the CDU help window
• LNAV maintains current heading when:
• passing the last active route waypoint
• passing the last waypoint prior to a route discontinuity
• passing the last route offset waypoint
• activating the inactive route or activating an airway intercept and not
within LNAV engagement criteria
• on go-around when valid missed approach path exists, LNAV mode
engages automatically at 50 feet radio altitude with flight director only or
200 feet radio altitude with the autopilot engaged. LNAV is disengaged by
engaging any other roll mode or by disengaging the autopilot and turning
both flight directors off
1
Lateral Navigation (LNAV) Switch
F/D
ON
A/T ARM
LR
A/P
OFF
CLB/CON
LNAV
VNAV
FLCH
IAS MACH
XFR
A/T
A/P DISENGAGE
OFF
IAS
UL
200
250
MODE CONTROL PANEL
3
6
5
1
2
4
October 31, 2007