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SAE Type II Fluid
Concentration Approximate Holdover Times Under Various Weather Conditions (hours:minutes)
°C °F Neat-Fluid/Water
(Vol. % / Vol. %)
*Frost Freezing
Fog
♦Snow ***Freezing
Drizzle
Light
Freezing
Rain
Rain on Cold
Soaked Wing
‡Other
100/0 12:00 0:35-1:30 0:20-0:55 0:30-0:55 0:15-0:30 0:05-0:40
above 0 above 32 75/25 6:00 0:25-1:00 0:15-0:40 0:20-0:45 0:10-0:25 0:05-0:25
50/50 4:00 0:15-0:30 0:05-0:15 0:05-0:15 0:05-0:10
100/0 8:00 0:35-1:30 0:20-0:45 0:30-0:55 0:15-0:30
0 to -3 32 to 27 75/25 5:00 0:25-1:00 0:15-0:30 0:20-0:45 0:10-0:25
50/50 3:00 0:15-0:30 0:05-0:15 0:05-0:15 0:05-0:10
below below 100/0 8:00 0:20-1:05 0:15-0:35 **0:15-0:45 **0:10-0:30
-3 to -14 27 to 7 75/25 5:00 0:20-0:55 0:15-0:25 **0:15-0:30 **0:10-0:20
CAUTION:
Clear ice
may require
touch for
confirmation.
CAUTION:
No holdover
time guidelines
exist.
below
-14 to -25
below
7 to -13
100/0 8:00 0:15-0:20 0:15-0:30
below
-25
below
-13
100/0
SAE Type II 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 SAE Type II 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: SAE TYPE II FLUID USED DURING GROUND DE-ICING/ANTI-ICING IS NOT
INTENDED FOR AND DOES NOT PROVIDE PROTECTION DURING FLIGHT.
Quick Reference Handbook
NORMAL PROCEDURES REVISION 8
Page NI - 4 Oct 11/02
Guidelines for Holdover Times Anticipated for Type IV
De-icing Fluid Mixtures as a Function of Weather
Conditions and Outside Air Temperature AFM APPENDIX E
SOURCE DOCUMENTATION: GIV AFM Appendix E, based on FAA
Bulletin No. FSAT 02-05: FAA-Approved Deicing Program (Winter 2002-2003
Update), dated 09/23/02.
UCAR ULTRA+ Type IV De-icing Fluid Mixtures:
CAUTION: THIS TABLE IS FOR USE IN DEPARTURE PLANNING ONLY AND IT SHOULD BE
USED IN CONJUNCTION WITH PRE-TAKEOFF CHECK PROCEDURES.
OAT
SAE Type IV Fluid
Concentration Approximate Holdover Times Under Various Weather Conditions (hours : minutes)
°C °F Neat-Fluid/Water
(Vol. % / Vol. %)
*Frost Freezing
Fog
♦Snow ***Freezing
Drizzle
Light
Freezing
Rain
Rain on Cold
Soaked Wing
‡Other
100/0 18:00 1:35-3:35 0:40-1:25 0:45-1:35 0:25-0:40 0:10-1:20
above 0 above 32 75/25
50/50
100/0 12:00 1:35-3:35 0:35-1:15 0:45-1:35 0:25-0:40
0 to -3 32 to 27 75/25
50/50
below below 100/0 12:00 1:25-3:00 0:25-0:55 **0:45-1:25 **0:30-0:45
-3 to -14 27 to 7 75/25
CAUTION:
Clear ice
may require
touch for
confirmation.
CAUTION:
No holdover
time guidelines
exist.
below
-14 to -24
below
7 to -12 100/0 12:00 0:40-2:10 0:20-0:45
below -24 below -12 100/0
UCAR ULTRA+ Type IV fluid may be used below -24°C (-12°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 UCAR ULTRA+ 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
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湾流4快速检查单QRH GULFSTREAM IV QUICK REFERENCE HANDBOOK 1(31)
