(For Sample Questions Only)
TABLE 1 - SAE TYPE I FLUID HOLDOVER GUIDELINES FOR WINTER 2003-2004
THE RESPONSIBILITY FOR THE APPLICATION OF THESE DATA REMAINS WITH THE USER
|OAT||Approximate Holdover Times Under Various Weather Conditions (minutes)|
|°C||°F||Frost2||Freezing Fog||Very Light Snow1||Light Snow1||Moderate Snow1||Freezing Drizzle3||Light Freezing Rain||Rain on Cold Soaked Wing||Other4|
|-3 and above||27 and above||45||11 - 17||18||11 - 18||6 - 11||9 - 13||4 - 6||2 - 5|
|below -3 to -6||below 27 to 21||45||8 - 13||14||8 - 14||5 - 8||5 - 9||4 - 6|
|below -6 to -10||below 21 to 14||45||6 - 10||11||6 - 11||4 - 6||4 - 7||2 - 5||CAUTION:
No holdover time guidelines exist
|below -10||below 14||45||5 - 9||7||4 - 7||2 - 4|
|°C = Degrees Celsius||°F = Degrees Fahrenheit||OAT = Outside Air Temperature||FP = Freezing Point|
|1||To use these times, the fluid must be heated to a minimum temperature providing 60°C (140°F) at the nozzle and an average rate of at least 1 L/m2 (2 gal./100 sq. ft.) must be applied to deiced surfaces, OTHERWISE TIMES WILL BE SHORTER.|
|2||During conditions that apply to aircraft protection for ACTIVE FROST.|
|3||Use light freezing rain holdover times if positive identification of freezing drizzle is not possible.|
|4||Heavy snow, snow pellets, ice pellets, moderate and heavy freezing rain, and hail.|
|5||Type I Fluid/Water Mixture is selected so that the FP of the mixture is at least 10°C (18°F) below OAT.|
- 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 also be reduced when aircraft skin temperature is lower than OAT.
- The only acceptable decision criteria time is the shortest time within the applicable holdover time table cell.
- Fluids used during ground deicing do not provide ice protection during flight.