I've got 50 plus years in aviation but have never heard of such an incident before. On walk around at destination I've seen ice accumulation on drain masts or on the lavatory service vehicle access panel but these were a rarity.
Question:
1) When incident occurred was it still day light?
2) How were the flight deck crew able to determine (TCAS?) that it was an ice block that hit them versus some other object such as weather balloon, another aircraft's debris etc?
https://www.dailymail.co.uk/news/art...flying-it.html