545 

Federal Aviation Administration, DOT 

Pt. 25, App. C 

(c) 

Takeoff maximum icing. 

The maximum 

intensity of atmospheric icing conditions for 

takeoff (takeoff maximum icing) is defined 

by the cloud liquid water content of 0.35 g/ 

m3, the mean effective diameter of the cloud 

droplets of 20 microns, and the ambient air 

temperature at ground level of minus 9 de-

grees Celsius (

¥
9 

°

C). The takeoff maximum 

icing conditions extend from ground level to 

a height of 1,500 feet above the level of the 

takeoff surface. 

VerDate Mar<15>2010 

10:12 Mar 18, 2014

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