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26th February 2004 | 05:10

#13 (permalink)

bookworm

Joined: Aug 2000

Posts: 3,648

Likes: 2

From: UK

"known ice" is a shorthand to mean that the aircraft is "certified for flight in known icing conditions".

TKS is a type of anti-icing system in which glycol is secreted on to the wing via pores in the leading edge.