Reminded me of the Flybe incident where the IAS and altitide indications became erroneous due to the pilots forgetting to activate the pitot/static probe heat.
The first planes I flew were 1940s technology and they all had pitot heat switches which had to be turned on by hand. All planes with 1950s (and later) technology had automatic pitot heat, i.e., it was ALWAYS ON.
Why the change? Why go back to manually operated pitot heat?
