pitot static blocked

[pineteam]

I found that drawing very useful to get the answer very fast. Sorry I’m not very good at drawing. But it’s supposed to be an aircraft climbing on the left and descending on the right. I have highlighted in green the pitot and static ports. So on the left, when the aircraft is climbing: if Pitot is blocked, IAS. Will over read and if static is blocked then IAS will under read. In a descent : if Static is blocked, IAS will over read. And if Pitot is blocked, IAS will under read.

Do the drawing yourself and you will never need to think about it again. = )