737 Flight Crew Operations Manual
Automatic Flight -
System Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
4.20.20 D6-27370-866-EGP
TO/GA mode termination from A/P go–around:
• below 400 feet RA, the AFDS remains in the go–around mode unless
both A/Ps and F/Ds are disengaged
• above 400 feet RA, select a different pitch or roll mode.
• if the roll mode is changed first:
• the selected mode engages in single A/P roll operation and is
controlled by the A/P which was first in CMD
• pitch remains in dual A/P control in TO/GA mode.
• if the pitch mode is changed first:
• the selected mode engages in single A/P pitch operation and is
controlled by the A/P which was first in CMD
• the second A/P disengages
• the roll mode engages in CWS R.
• the A/T GA mode is terminated when:
• another pitch mode is selected
• ALT ACQ annunciates engaged.
Note: The pitch mode cannot be changed from TO/GA until sufficient
nose–down trim has been input to allow single channel A/P
operation. This nose–down trim is automatically added by the
A/P to reset the trim input made by the A/P at 400 feet RA and
at 50 feet RA during the approach.
With pitch mode engaged in TO/GA, ALT ACQ engages when approaching the
selected altitude and ALT HOLD engages at the selected altitude if the stabilizer
position is satisfactory for single A/P operation.
• if stabilizer trim position is not satisfactory for single A/P operation:
• ALT ACQ is inhibited
• A/P disengage lights illuminate steady red
• pitch remains in TO/GA.
Note: To extinguish A/P disengage lights, disengage A/Ps or select
higher altitude on MCP.
F/D Go–Around
If both A/Ps are not engaged, a manual F/D only go–around is available under the
following conditions:
• inflight below 2000 feet RA
• inflight above 2000 feet RA with flaps not up or G/S captured
• not in takeoff mode.
September 15, 2016
To Next Page
Loading...
