Honeywell !i!gr.c’
3. B. (7) (g)
When the autopilot is engaged and no
mode is selected, the autopilot will
winas level attitude. When the bank
lateral flight director
drive the aircraft to a
anale is less than
6 d;grees, the autopilot will fly headi~g hold. Heading hold
is discussed
in paragraph 3.B.(7)(g)a. The roll hold mode of
operation is discussed
in paragraph 3.B.(7)(g)~, turn knob is
discussed in paragraph 3.B.(7)(g)s, and the go-around mode is
discussed in paragraph 3.B.(7)(g)~.
~ Lateral Steering Command with Autopilot Disengaged
With the autopilot disengaged, the selected flight director
steering command is routed through the following:
● Rate Limiter
. Bank Angle Limit
● Roll Hold Switch
. Summing Point
● AP Engage Switch
. Roll Bar Bias Switch
The steering command is then routed to the symbol generator
through the ASCB to drive the flight director lateral
steering cue on the PFD.
As the
pilot banks the aircraft to follow the steering
command, roll attitude information is provided to the
summation point from the
IRS through the AP ENG switch.
As the steering command is satisfied, the flight director
lateral steering cue is centered on the PFD, and the
aircraft is now flying the flight director command.
As the aircraft approaches the selected heading or radio
beam center, the flight director command diminishes in size
and the roll attitude signal predominates. This causes the
flight director lateral steering cue to move out of center
in the opposite direction to the original command. As the
pilot flys the aircraft to satisfy the command, the
following is taking place:
. The aircraft is rolling back to a wings level attitude.
. The flight director command is satisfied.
● The roll attitude signal is going to zero.
● The flight director lateral steering cue is returning to
center.
Roll bar bias (RBB) is a fixed voltage level used to bias
the flight director lateral steering cue out of view to
prevent the pilot from flying invalid data. The lateral
steering cue is biased out of view if:
c No flight director mode is selected.
. The flight director is not valid.
22-14-00
Page 298.96
Aug 15/91
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