4. C. (6) (b) Autothrottle Arm, Takeoff, and Hold Mode Select (Figure 268).
~ Autothrottle Arm Mode
With A/T ARM ON on the GP-820 Flight Guidance Controller,
and the autothrottle disengaged, the A/T outputs white arm
mode annunciations in the A/T mode annunciation window on
the PFD. These annunciations turn green when an
autothrottle mode is engaged.
~ Autothrottle Takeoff Mode
Takeoff (TO) mode is used to advance and set takeoff r.)ower.
On
●
●
TO
the g~ou~d, this mode is armed by:
Selecting A/TARMON on the GP-820
Selecting flight director TO mode with TO GA switch on
either power lever.
is annunciated in green in the PFD vertical mode window
and in white in the PFD autothrottle mode window.
Takeoff is captured following ARM by:
. Advancing both power levers above 1.17 EPR
. Selecting A/T ENG with either power lever mounted
ENG/DISENG switches.
The white TO annunciation in the autothrottle window changes
to green and is
boxed for 5 seconds.
~ Autothrottle Hold Mode
The hold mode is automatic during takeoff. The autothrottle
clamps the power levers when 60 knots is achieved. This
mode is annunciated on the PFD in green as HOLD. The
power
levers remain in
HOLD until 400 feet AGL as a minimum and
will stay in HOLD until another mode is selected.
22-14-00
Page 298,191/298.192
Aug 15/91
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