Originally Posted by
BelArgUSA
I vaguely recall most FAA certificated airplanes to be able to handle light/moderate icing only.
Lots of dust in my CAR 4b and FAR 25 pages...
xxx
However would mention that the L-188 Electra could handle "heavy icing".
At least is what I recall vaguely from a classroom discussion 35+ years ago.
Maybe our illustrious
411A can clarify the certification of the superior Lockheed product.
Happy contrails
Nope.
By definition,
NO a/c can handle "heavy" (or. "severe") icing because it's defined as aircraft specific, and heavy is when it overpowers whatever anti-/de-ice systems you have.
Severe icing: The rate of accumulation is such that deicing/anti-icing equipment fails to reduce or control the hazard. Immediate flight diversion is necessary
But the light/moderate/heavy/severe is a subjective, aircraft-dependent scale, and not directly related to actual LWC etc. conditions.
See
here fo a discussion on the terminology.