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(32° AND 5°F)
ANY NOT
REQUIRED
(50°F) BELOW
-15°C (5°F) 1:15
BETWEEN
0° AND -7°C
(32° AND 19.4°F)
1:30
OFF BETWEEN
-7°· AND -15°C
(19.4° AND 5°F)
:30
REQUIRED
BELOW
-15°C ANY
Drain all the galley equipment which contains water, such as coffee makers and water
boilers/heaters.
You must operate the water taps several times to ENSURE that the supply lines are empty.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-21
31 May 2001
If the conditions to drain all the galley equipment cannot be carried out, the heating
recommendations should be used as follows.
RAMP
TEMPERATURE
EXTERNAL
HEATER
APU
HEAT
DRAINING OF
WATER SYSTEM
0°C (32°F)
TO
-5·C (23°F)
1 HOUR
EVERY
4 HOURS
1 HOUR
EVERY
4 HOURS
NO
-5°C (23°F)
TO
-10°C (14°F)
2 HOURS
EVERY
4 HOURS
2 HOURS
EVERY
4 HOURS
NO
-10°C (14°F)
TO
-15°C (5°F)
CONTINUOUS CONTINUOUS NO
BELOW
-15°C
(5°F)
CONTINUOUS AS REQUIRED YES
Toilets............................................................................................................................. DRAINED
All toilets should be drained to protect from freezing.
Life Rafts.................................................................................................................AS REQUIRED
If the life rafts are expected to be exposed to temperatures below -28°C (-20°F) it is
recommended that they should be removed from the airplane. At temperatures colder than this,
the CO2 cartridge may discharge.
Batteries........................................................................................................................ REMOVED
If the nickel-cadium batteries will be exposed to temperature below -18°C (0°F), the batteries
should be removed and stored in an area warmer than -18°C (0°F), but below 40°C (104°F).
Doors .................................................................................................................................CLOSED
The main cabin door, baggage compartment door and access doors should be closed to prevent
snow or rain from entering the airplane.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-22 FAA APPROVED
31 May 2001
GROUND DE-ICING/ANTI-ICING PROCEDURES
PREFACE
This section contains procedures for ensuring safe operation during icing conditions and for Deicing/
Anti-Icing a Gulfstream IV airplane.
INTRODUCTION
Federal Aviation Regulations prohibit takeoff when snow, ice, or frost is adhering to wings and
control surfaces of the airplane. The Pilot-in-Command (PIC) has ultimate responsibility to
determine that all critical components of the airplane are free of ice, snow, or frost formations.
To ensure a safe takeoff in conditions conducive to icing, an inspection of critical airplane
surfaces and components must be accomplished shortly before takeoff.
Airplane De-icing/Anti-Icing may be accomplished in either a One-Step or a Two-Step Process.
In the worst case scenario the airplane should be deiced, inspected, and depart within an
approximate two to five minute time period. Depending on current atmospheric conditions and
assuming worst case scenario, the coordination between the Flight Crew, the Ground De-icing
Crew and Air Traffic Control is vital.
Standard practice is to deice and, if required, anti-ice the airplane before takeoff. The use of
heated solutions of Freezing Point Depressant (FPD) fluids for de-icing followed by an anti-icing
process using a more concentrated solution produces a lower freeze point on the airplane
surfaces.
Maintenance concepts for Ground De-icing/Anti-icing may vary between FBO’s; however, basic
de-icing/anti-icing procedures prevail throughout the industry. FPD fluid manufacturers provide
recommended dilution mixtures based on Outside Air Temperature (OAT) and precipitation
conditions. The Pilot-in-Command should consult with the ground de-icing crew to verify that
the de-icing fluid mixture is suitable for the atmospheric conditions. Both Type I and Type II
FPD fluids are recommended for use on Gulfstream Airplanes. Only the Type IV fluids
specified herein are recommended for use on Gulfstream Airplanes. The use of other Type
　
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