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and Upper/Lower Surfaces
• Flaps, Flap Tracks and Flap Screwjacks
• Ground and Flight Spoilers
• Ailerons, Elevator and Rudder
• Engine Inlet
• All Cockpit Windows
• Antennas
• Fuselage
• AOA Probes, SAT-TAS Probe, Pitot Tubes and Static Ports
• Fuel Tank Vents
• Cooling, APU Air Intakes, Inlets and Exhausts
• 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).
6. 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 during
ground operation. Underwing frosting can occur at ambient temperatures 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 1/8 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.
7. “Car Wash” De-Icing Process:
Some domestic and international airports have a final de-icing check point that
employs either a ″car wash″ spray gantry or ground crews on ″snorkel″ trucks to
apply de-icing fluid just prior to takeoff. Gulfstream recommends that the APU be
shutdown with the inlet door closed, that the bleed air valves be closed, and that
the air conditioning system be shutdown prior to employing this type of de-icing
procedure. Additionally, ground crews should be cautioned to avoid spraying
de-icing fluids directly into the engine inlets. The engines should be at minimum
OPERATING MANUAL
07-01-00 ALL WEATHER OPERATIONS AND PROCEDURES
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Revision 8
power (idle) during these operations.
8. Exterior De-Icing with Engines or APU Operating:
• Ensure engines are left in IDLE during de-icing to reduce chances of injury
to personnel at inlet or exhaust areas.
• Ensure L / R COWL ANTI ICE switches are selected OFF.
• Ensure L ENG / R ENG / APU BLEED AIR switches are selected OFF.
• Ensure the outflow valve is CLOSED.
CAUTION
EXTREME CARE SHOULD BE TAKEN TO ENSURE
DE-ICING FLUID DOES NOT ENTER THE ENGINE
OR APU INLETS.
9. Holdover Times and Application Guidelines:
See the figures that follow for holdover times and application guidelines for SAE
Type I, II and IV Fluid Mixtures.
OPERATING MANUAL
ALL WEATHER OPERATIONS AND PROCEDURES 07-01-00
Page 5
October 11/02
Revision 8
Guidelines For Holdover Times Anticipated For SAE Type I Fluid Mixtures As A
Function Of Weather Conditions And Outside Air Temperature
Figure 1
OPERATING MANUAL
07-01-00 ALL WEATHER OPERATIONS AND PROCEDURES
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Revision 8
Guidelines For The Application Of SAE Type I Fluid Mixtures: Minimum Concentrations
As A Function Of Outside Air Temperature
Figure 2
OPERATING MANUAL
ALL WEATHER OPERATIONS AND PROCEDURES 07-01-00
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October 11/02
Revision 8
Guidelines For Holdover Times Anticipated For SAE Type II Fluid Mixtures As A
Function Of Weather Conditions And Outside Air Temperature
Figure 3
OPERATING MANUAL
07-01-00 ALL WEATHER OPERATIONS AND PROCEDURES
Page 8
October 11/02
Revision 8
Guidelines For The Application Of SAE Type I And Type IV I Fluid Mixtures: Minimum
Concentrations As A Function Of Outside Air Temperature
Figure 4
OPERATING MANUAL
ALL WEATHER OPERATIONS AND PROCEDURES 07-01-00
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October 11/02
Revision 8
Guidelines For Holdover Times Anticipated For UCAR ULTRA+ Type IV Fluid Mixtures
As A Function Of Weather Conditions And Outside Air Temperature
Figure 5
OPERATING MANUAL
07-01-00 ALL WEATHER OPERATIONS AND PROCEDURES
Page 10
October 11/02
Revision 8
Guidelines For Holdover Times Anticipated For OCTAGON MAXFLIGHT Type IV Fluid
Mixtures As A Function Of Weather Conditions And Outside Air Temperature
Figure 6
OPERATING MANUAL
ALL WEATHER OPERATIONS AND PROCEDURES 07-01-00
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October 11/02
Revision 8
Guidelines For Holdover Times Anticipated For KILFROST ABC-S Type IV Fluid
Mixtures As A Function Of Weather Conditions And Outside Air Temperature
　
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