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Function of Weather Conditions and OAT
CAUTION: THIS TABLE IS FOR USE IN DEPARTURE PLANNING ONLY AND IT SHOULD BE
USED IN CONJUNCTION WITH PRE-TAKEOFF CHECK PROCEDURES.
OAT
Manufacturer
Specific
Type IV Fluid
Approximate Holdover Times Under Various Weather Conditions (hours : minutes)
°C °F
Concentration
Neat-Fluid/Water
(Vol. % / Vol. %)
*Frost Freezing
Fog ♦Snow ***Freezing
Drizzle
Light
Freezing
Rain
Rain on Cold
Soaked Wing
‡Other
100/0 18:00 2:35-4:00 1:10-2:00 1:20-1:50 1:00-1:25 0:20-1:15
above 0 above 32 75/25 6:00 1:05-1:45 0:30-1:05 0:45-1:10 0:35-0:50 0:10-0:50
50/50 4:00 0:20-0:35 0:05-0:20 0:15-0:20 0:05-0:10
100/0 12:00 2:35-4:00 1:00-1:40 1:20-1:50 1:00-1:25
0 to -3 32 to 27 75/25 5:00 1:05-1:45 0:30-0:55 0:45-1:10 0:35-0:50
50/50 3:00 0:20-0:35 0:05-0:15 0:15-0:20 0:05-0:10
below below 100/0 12:00 0:45-2:05 0:45-1:20 **0:20-1:00 **0:10-0:30
-3 to -14 27 to 7 75/25 5:00 0:25-1:00 0:25-0:50 **0:20-1:10 **0:10-0:35
CAUTION:
Clear ice
may require
touch for
confirmation.
CAUTION:
No holdover
time guidelines
exist.
below
-14 to -25
below
7 to -13 100/0 12:00 0:20-0:40 0:40-1:10
below -25 below -13 100/0
KILFROST ABC-S Type IV fluid may be used below -25°C (-13°F) provided the freezing
point of the fluid is at least 7°C (13°F) below the OAT and the aerodynamic acceptance
criteria are met. Consider use of SAE Type I fluid when KILFROST ABC-S Type IV fluid
cannot be used.
°C Degrees Celsius OAT Outside Air Temperature
°F Degrees Fahrenheit Vol. Volume
RESPONSIBILITY FOR APPLICATION OF THESE DATA REMAINS WITH THE USER.
* During conditions that apply to airplane protection for ACTIVE FROST
** No holdover time guidelines exist for this condition below -10°C (14°F)
*** Use light freezing rain holdover times if positive identification of freezing drizzle is not
possible.
‡ Snow pellets, ice pellets, heavy snow, moderate and heavy freezing rain, hail
♦ Snow includes snow grains
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 MAY 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: KILFROST ABC-S TYPE IV FLUID USED DURING GROUND DE-ICING/ANTIICING
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-32 FAA APPROVED
11 October 2002
TABLE VIII
Guideline for Holdover Times Anticipated for SAFEWING MP IV 1957 Type IV Fluid Mixtures
as a Function of Weather Conditions and OAT
CAUTION: THIS TABLE IS FOR USE IN DEPARTURE PLANNING ONLY AND IT SHOULD BE
USED IN CONJUNCTION WITH PRE-TAKEOFF CHECK PROCEDURES.
OAT
Manufacturer
Specific
Type IV Fluid
Approximate Holdover Times Under Various Weather Conditions (hours : minutes)
°C °F
Concentration
Neat-Fluid/Water
(Vol. % / Vol. %)
*Frost Freezing
Fog ♦Snow ***Freezing
Drizzle
Light
Freezing
Rain
Rain on Cold
Soaked Wing
‡Other
100/0 18:00 1:05-2:15 0:35-1:05 0:40-1:10 0:30-0:45 0:15-1:10
above 0 above 32 75/25 6:00 1:10-2:10 0:35-1:05 0:35-1:05 0:25-0:40 0:10-1:00
50/50 4:00 0:25-0:50 0:15-0:30 0:15-0:25 0:05-0:15
100/0 12:00 1:05-2:15 0:30-0:55 0:40-1:10 0:30-0:45
0 to -3 32 to 27 75/25 5:00 1:10-2:10 0:30-0:50 0:35-1:05 0:25-0:40
50/50 3:00 0:25-0:50 0:10-0:20 0:15-0:25 0:05-0:15
below below 100/0 12:00 0:45-1:30 0:30-0:50 **0:35-0:55 **0:20-0:35
-3 to -14 27 to 7 75/25 5:00 0:25-1:10 0:20-0:40 **0:25-0:55 **0:15-0:30
CAUTION:
Clear ice
may require
touch for
confirmation.
CAUTION:
No holdover
time guidelines
exist.
below
-14 to -25
below
7 to -13 100/0 12:00 0:25-0:40 0:25-0:45
below -25 below -13 100/0
SAFEWING® MP IV 1957 Type IV fluid may be used below -25°C (-13°F) provided the
freezing point of the fluid is at least 7°C (13°F) below the OAT and the aerodynamic
acceptance criteria are met. Consider use of SAE Type I fluid when SAFEWING® MP IV
1957 Type IV fluid cannot be used.
°C Degrees Celsius OAT Outside Air Temperature
°F Degrees Fahrenheit Vol. Volume
RESPONSIBILITY FOR APPLICATION OF THESE DATA REMAINS WITH THE USER.
　
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