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FUSELAGE
Remove snow top-to-bottom. Avoid spraying heated fluids directly on cabin and cockpit
windows. Ensure that the radome area is clean. If using mechanical means, special care should
be taken to avoid damage to antennas. Remove any fluid runoff from cockpit windows and
radome prior to departure. Avoid spraying directly on pitot tubes, static ports, and Angle-of-
Attack probes. Do not spray into APU inlets, engine inlets or ram air inlets.
CAUTION: IF APU/ENGINES ARE RUNNING WHEN SPRAYING OF DE-ICING
FLUIDS IS IN PROGRESS, TURN BLEED AIR OFF AND CLOSE OUTFLOW
VALVE AND DOORS.
WING
Clean wing from wing tip to wing root. If using the spray method, ensure that runoff is away
from aileron balance bay area to prevent accumulation of melted snow/ice in this area. Ensure
that leading edge is free of ice. The Pilot-in-Command should conduct a hands-on inspection to
verify leading edge, upper and lower wing surfaces are clean.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-35
31 May 2001
ENGINE
Snow/ice removal from the engine inlet should be accomplished using mechanical means. Any
frozen deposits that may be bonded to inlet/intake surfaces or fan blades must be removed by hot
air. Do not spray de-icing fluid directly into the engine core.
LP Fan must be verified to be free to rotate. If not the Engine must be pre-conditioned prior to
start.
CAUTION: DO NOT USE DE-ICING FLUID. AFTER DE-ICING ENGINE, START
ENGINE(S) IMMEDIATELY TO PREVENT ANY RE-ICING CONDITION.
SELECT ENGINE ANTI-ICE ON AFTER ENGINE IS STARTED.
LANDING GEAR
The tires, wheels, brakes, struts, side braces and uplocks should be free of snow/ice.
CAUTION: DO NOT USE DE-ICING FLUID ON THE BRAKES AND/OR WHEELS.
DOORS
Main door and baggage compartment door seals, hinges and tracks should be free of snow/ice.
Ensure proper operation to prevent re-freezing in flight.
ANTI-ICING
If desired, apply ground Anti-Icing process immediately after the airplane is deiced. This
involves applying a mixture of SAE or ISO Type II and water to critical surfaces of the airplane.
This step may increase "Holdover" Time(s) between Anti-Icing and estimated departure time.
Any time the recommended Holdover Time is exceeded, a Pre-Takeoff Inspection is
required. Refer to Holdover Time(s) Tables for Type I/Type II Fluids.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-36 FAA APPROVED
31 May 2001
PREFLIGHT DE-ICING INSPECTION CHECKLIST
Perform Preflight De-icing Inspection IMMEDIATELY following Ground De-icing or during
Anti-Icing process.
All items below should be free of snow, ice and/or frost accumulation.
1. Conduct a "hands-on" inspection to verify that all surfaces are clean. Wing leading edges,
upper and lower surfaces, trailing edges, around flight control actuators, and push rods.
2. Vertical and horizontal stabilizers including leading edges, side panels, and upper/lower
surfaces.
3. Flaps, flap tracks and flap screwjacks
4. Ground and Flight Spoilers
5. Ailerons, Elevator and Rudder
6. Engine Inlet
7. All Cockpit Windows
8. Antennas
9. Fuselage
10. Angle-of-Attack Probes, SAT-TAS Probe, Pitot Tubes and Static Ports
11. Fuel Tank Vents
12. Cooling, APU Air Intakes, Inlets and Exhausts
13. Landing Gear
Once the Preflight Inspection is complete, the airplane is clean and adequately protected, the
airplane should depart as soon as possible. This is especially important in conditions of
precipitation or high relative humidity (small temperature/dew point spread).
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-37
31 May 2001
UNDERWING FROST
Underwing frost may form between the forward and aft wing spars following extended high
altitude flight. This frost may also occur at low altitude and during ground operation. This wing
frosting can occur at ambient temperature well above freezing and may be the forerunner of clear
ice formation on the upper wing. Frost in this area can be melted by refueling with warmer fuel.
Gulfstream recommends removal of underwing frost in excess of 1/8th inch (3.2 mm) thickness
and all frost on the leading edges and upper surfaces. Depending on atmospheric conditions, it is
recommended that the wings be de-iced prior to departure.
CAR WASH DE-ICING PROCESS
Some domestic and international airports have a final de-icing check point that employs either a
　
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