Takeoff and Go-Around Function (TO/GA)
Takeoff is a flight director only function of the TO/GA mode. Flight director pitch and roll
commands are displayed and the autothrottle maintains takeoff N1 thrust limit as selected
from the FMC.
Both flight directors (F/Ds) must be ON to engage the takeoff mode prior to starting the
takeoff. The F/D takeoff mode is engaged by pushing the TO/GA switch on either thrust
lever. The Flight Mode Annunciations (FMAs) display FD as the A/P status, TO/GA as the
pitch mode, and blank for the roll mode.
Option - Flight director commands HDG SEL on takeoff.
The Flight Mode Annunciations (FMAs) display FD as the A/P status, TO/GA as the pitch
mode, and HDG SEL as the roll mode.
During takeoff, pushing a TO/GA switch engages the autothrottle (A/T) in the N1 mode. The
A/T annunciation changes from ARM to N1 and thrust levers advance toward takeoff thrust.
The F/D can also be engaged in the takeoff mode with the F/D switches off. If a TO/GA
switch is pushed after 80 knots below 2000 feet AGL and prior to 150 seconds after lift–off,
the F/D command bars automatically appear for both pilots.
