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OAT.
CAUTION: THE TIME OF PROTECTION WILL BE SHORTENED IN HEAVY WEATHER
CONDITIONS. HEAVY PRECIPITATION RATES OR HIGH MOISTURE CONTENT,
HIGH WIND VELOCITY OR JET BLAST WILL REDUCE HOLDOVER TIME BELOW
THE LOWEST TIME STATED IN THE RANGE. HOLDOVER TIME MAY BE
REDUCED WHEN AIRPLANE SKIN TEMPERATURE IS LOWER THAN OAT.
CAUTION: SAE TYPE I FLUID USED DURING GROUND DE-ICING/ANTI-ICING IS NOT
INTENDED FOR AND DOES NOT PROVIDE PROTECTION DURING FLIGHT.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-25
11 October 2002 GIV-SP
TABLE II
Guidelines for the application of SAE Type I fluid mixtures.
Minimum Concentrations as a Function of Outside Air Temperature(OAT)
Concentrations in % V/V
OAT One Step Process Two Step Process
De-icing / Anti-icing Step 1: De-icing Step 2: Anti-icing1
- 3°C (27°F)
and above
Water or mix of fluid
and water heated to
60°C (140°F) minimum
at the nozzle.
below
- 3°C (27°F)
Mix of fluid and water
heated to 60°C (140°F)
minimum at the nozzle,
with a freeze point of at
least 10°C (18°F)
below OAT
FP of heated fluid
mixture shall not be
more than 3°C (5°F)
above OAT
Mix of fluid and water
heated to 60°C (140°F)
minimum at the nozzle,
with a freeze point of at
least 10°C (18°F)
below OAT
Note: Upper temperature limit shall not exceed fluid and aircraft manufacturers recommendations.
CAUTION: WING SKIN TEMPERATURES MAY DIFFER AND IN SOME CASES MAY BE LOWER THAN OAT.
A STRONGER MIX (MORE GLYCOL) CAN BE USED UNDER THE LATTER CONDITIONS.
(1) To be applied before first step fluid freezes, typically within 3 minutes.
°C = Degrees Celsius / °F = Degrees Fahrenheit / OAT = Outside Air Temperature / FP = Freezing Point
CAUTION: SAE TYPE I FLUID USED DURING GROUND DE-ICING/ANTI-ICING IS NOT INTENDED FOR AND DOES
NOT PROVIDE PROTECTION DURING FLIGHT.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-26 FAA APPROVED
GIV-SP 29 January 2002
FLUIDS FOR GROUND DE-ICING
The times of protection (the holdover times) for different de-icing fluids, vary considerably.
Furthermore, these times depend to a large extent on the meteorological conditions and methods
of application.
The time of protection will be shortened, for instance, by wet snow, increasing content of
moisture, wet airplane surface, relative high temperature of airplane surface and of the fluid
being used, or high wind velocity and unfavorable wind direction. All these conditions cause
unwanted run down of the protective film. If these conditions accumulate, the time of protection
can be shortened considerably.
CAUTION: DO NOT SPRAY DE-ICING FLUID IN AREAS WHERE SPRAY OR FLUID
MAY ENTER THE ENGINE OR APU AIR INLETS. DE-ICING FLUID MAY
BE USED TO CLEAR THESE AREAS PROVIDING IT IS THOROUGHLY
WIPED CLEAN BEFORE STARTING.
IF A DEICER SOLUTION IS INADVERTENTLY SPRAYED INTO THE
ENGINE OR APU INLETS OR CONTACTS THE EXHAUST WHEN THE
ENGINES OR APU ARE OPERATING, A POTENTIALLY UNSAFE
CONDITION COULD DEVELOP IN THE CABIN. ENGINE BLEEDS SHOULD
BE OFF AND DOORS AND OUTFLOW VALVE CLOSED DURING DE-ICING
OPERATIONS TO MINIMIZE THE RISK OF CABIN ENVIRONMENT
CONTAMINATION. IT IS RECOMMENDED APU NOT BE RUNNING AND
INLET DOOR CLOSED DURING DE-ICING OPERATIONS.
ONE OR TWO STEP PROCESS(ES)
ONE-STEP De-icing/Anti-Icing implements a heated, diluted de-icing/anti-icing fluid, both to
remove ice, snow, and/or frost from airplane surfaces and to protect the airplane from further
accumulation.
TWO-STEP De-icing/Anti-Icing implements hot water or a hot mixture of water-diluted de-icing
fluid followed immediately by treatment with anti-icing fluid. The Two-Step process is generally
accomplished using Type II FPD fluid.
CAUTION: TYPE II/IV FPD FLUID GENERALLY SHOULD NOT BE APPLIED
FORWARD OF THE LEADING EDGES OF THE WING. IF USED FOR DEICING,
DO NOT APPLY FORWARD OF COCKPIT WINDOWS. ENSURE
THAT RADOME AND COCKPIT WINDOWS ARE CLEAN.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-27
11 October 2002 GIV-SP
TABLE III
Guideline for Holdover Times Anticipated for SAE Type II Fluid Mixtures as a Function of
Weather Conditions and OAT
CAUTION: THIS TABLE IS FOR USE IN DEPARTURE PLANNING ONLY AND SHOULD BE
USED IN CONJUNCTION WITH PRE-TAKEOFF CHECK PROCEDURES.
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湾4飞机飞行手册AFM Gulfstream IV AIRPLANE FLIGHT MANUAL 2(65)
