Honeywell
● The speed target is
MAINTENANCE
MANUAL
GULFSTREAM IV
changed to the descent
speed, provided
the
preselector is dialed down, just prior to the TOD if a
deceleration is required or at the TOD if no deceleration is
required. For any descent greater than 6500 feet, any
descent within 100 miles of the TOD, or
any descent past the
TOD, the speed target is changed to the descent speed (at
the beginning of the descent). Descents started more than
100 miles prior to the
TOD and descents with less than 6500
feet altitude change are considered cruise descents, and the
speed target remains at the cruise speed.
● During descent, the speed target is the descent speed
schedule selected during initialization, and the transition
to CAS is accomplished automatically. This speed schedule
is observed during any intermediate
level off.
. If a speed/altitude limit is entered, the speed target is
changed to the limit minus 10 knots prior to the limiting
altitude to allow for deceleration, provided the preselector
is set below the limiting altitude.
c
When the aircraft is within 20 NM flight plan distance from
the destination and less than 10,000 feet above the
destination elevation, the speed target is changed to the
placard speed for 10-degree flaps minus 10 knots. This
allows
for the pilot to start extending the flaps when
required.
. As the gear and flaps are extended, the
speed target is
changed to the placard minus 10 knots for the next expected
flap selection.
When landing flaps are selected, (39
degrees), the speed target is set to Vref plus 10 knots.
Typically, the speed would change to 240 knots at 20 NM, 210
knots when 10-degree flaps are selected, 160 knots when
20-degree flaps are selected, and some value between 133-158
knots when 39-degree flaps are selected.
. Vref displayed on the display controller and on the PFD is
calculated by the FMS and is always based on current weight
and configuration.
This Vref is accurate and valid even
below the 45,000 pound minimum landing weight.
.
If go-around is selected, the speed target is changed as
described
for climb.
22-14-00
Page 298.213
Apr 15/93
Use or disclosure of informationon this page is subject to the restrictions onthe title page ofthis document.
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