Dbate,
Is that specific to Airbus? Reason I ask is we are allowed up to 1/8 inch of frost on control surfaces/fuselage our 727-200F's. Matter of fact, last night we kicked out 16 727's covered with frost, and none requested de-icing. Upper wing and top of fuselage were covered with heavy frost (not hoar frost)
Not questioning your post, as I'm sure you posted info available to you, but is it airline, type, or industry standard?
I've been de-icing for 4 years now, and have seen everything from J-41 to 757 leave with snow, and/or frost, and not needing de-iced, to the same type wanting de-iced with little or no snow/ frost present.
Not questioning, just curious.
nverted