Dear Sirs
With reference to the incident:
ASN Aircraft accident McDonnell Douglas MD-81 OY-KHO Gottrra
First of all let me say: "Chapeau" to the exceptional skill of the innocent crew who brought the airplane on ground with 0 kill.
Let me add that after that accident some woolen threads were installed at the roots of the wings of the MD80, free to shake into the wind, in order to facilitate the identification of subtle icing Vetrone by the crew, often unnoticed.