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defogging of the windshield.
Radome
Since the radome is not de-iced, flight in icing conditions will allow ice to build up on the
radome. If this occurs, the radar picture will deteriorate.
Wing Anti-Icing
The wing anti-icing system is a hot leading edge system wherein hot air is distributed to the
leading edge of the wing to maintain the skin temperature sufficiently hot to prevent ice
formation. The system utilizes hot compressed air from the bleed air manifold. The system is
preset to maintain approximately 130°F in the wing plenum. The wing anti-icing system places
the highest demand on the bleed air manifold; therefore, it is imperative that the system be
selected off before ground starting either engine.
CAUTION: DO NOT ATTEMPT TO USE APU AIR FOR WING ANTI-ICING BECAUSE
THE APU IS BLEED AIR VOLUME-LIMITED. DAMAGE TO THE APU WILL
OCCUR.
APPROACH
Cowl/Wing anti-icing must be ON during flight operations when icing conditions exist or are
anticipated.
For airplanes SN 1320 and subs and previous airplanes with ASC 381 installed when the "wing
anti-ice" is ON, the warm exhaust air from the wing anti-ice system is directed aft through the
wheel well, across the wheels and then vents overboard. Wheel and brake assemblies that were
subjected to adverse weather conditions prior to takeoff may benefit from the warm wheel well
environment prior to gear extension.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-18 FAA APPROVED
GIV-SP 13 September 2000
BEFORE LANDING
It is recommended landing gear be extended earlier than normal.
Gear will assimilate the total air temperature in 3 to 5 minutes.
Perform several brake applications to 3,000 PSI.
Brake-by-Wire: Turn Anti-Skid OFF or use Brake Nutcracker Override Switch.
HMAB: Turn Anti-Skid OFF.
Ensure Anti-Skid is ON for landing.
Air Start Ignition...............if runway is covered with snow, slush, or standing water ................ ON
Ground Spoilers.......................................................................................................................ARM
LANDING
Perform firm touchdown to reduce strength of ice bond on brakes.
At main gear contact with the runway, Ground Spoilers should deploy automatically. Manual
speed brake deployment is a recommended back-up procedure.
Lower nose wheel to the runway immediately as the Ground Spoilers and Thrust Reversers are
being actuated.
Apply brakes smoothly and symmetrically with moderate-to-firm pressure until a safe stop is
assured.
Let the ANTI-SKID System perform its function. Do not attempt to cycle brake pedal pressure if
the anti-skid is "releasing". Maintain constant brake pedal pressure.
DO NOT use asymmetric reverse thrust on icy or slippery runways.
Be prepared for possible downwind drift on slippery runways with a crosswind when using
reverse thrust.
DO NOT attempt to turn off the runway until attaining safe, very slow, taxi speed.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-19
13 September 2000 GIV-SP
TAXI IN/PARKING
CAUTION: USE EXTREME CAUTION WHEN TAXIING ON ICE COVERED RUNWAYS
OR TAXIWAYS AS EXCESSIVE SPEED OR HIGH CROSSWINDS MAY
START A SKID. MAKE ALL TURNS AT REDUCED SPEED.
Cowl Anti-ice ..........................................................................................................AS REQUIRED
If severe icing conditions are present, Cowl Anti-icing should remain ON. During prolonged
ground operation, periodic engine run-up to 85% LP may be performed to reduce the possibility
of ice buildup. This is dependent on runway/taxi surface conditions and the proximity of other
airplanes.
Avoid puddles and slush.
Chock wheels.
Release Parking Brake.
If hangar space is available hangar the airplane as soon as possible.
SECURING FOR OVERNIGHT OR EXTENDED PERIODS ON RAMP
If remaining overnight at airports where normal support is not available, the flight crew should
assure that the following actions have been accomplished.
Outflow Valve ....................................................................................................................CLOSED
Position the pressurization mode selector to MAN and hold outflow valve switch to CLOSE until
the outflow valve indicator shows the valve has closed.
Wheel Chocks ...................................................................................................CHECK IN PLACE
Parking Brake............................................................................................................................OFF
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湾4飞机飞行手册AFM Gulfstream IV AIRPLANE FLIGHT MANUAL 2(62)
