Originally Posted by
FlyingStone
FFS if only people bothered to open the forbidden manual called FCTM.
Great reference, but not all airlines use the generic Boeing FCTM. My airline has a tailored manual that does not provide these bullet notes on the Airspeed Unreliable NNC. I’m curious if either Ethiopian or Lion Air used this manual because one of the ongoing debates in the 737 MAX thread on the R&N side is whether the crews should have retracted the flaps given that they were initially dealing with an unreliable airspeed issue.
As far as the takeoff scenario, throttling back to 80% is no worse than losing an engine. That being said, in this situation one must be mindful of obstacle clearance, so the pilots should consider following any engine-out routing that might apply for the particular airport.