The code for the (weather) condition that led to de-icing being requested, and possibly performed. The codes listed under "Legal values" should always be supported. Additional codes can be defined if necessary. Codes defined here are always two digits.
Legal values
The following list of codes are defined:
"01" - Frost removal
"02" - Light snow
"03" - Moderate snow
"04" - Freezing drizzle
"05" - Light freezing rain
"06" - Rain on cold soaked wings
"07" - Light frozen deposits
"08" - Moderate frozen deposits
"09" - Heavy frozen deposits
"10" to "29" are reserved for future use
"30" to "99" are reserved for airport specific codes
