Originally Posted by
OldnGrounded
Probably the regulators aren't taking the chance of letting those flights go without MCAS being inhibited (as far as anyone knows).
If I understand the situation correctly, having flaps out should do two things:
- inhibit the MCAS software
- ensure that the aerodynamic problems which MCAS was designed to mitigate cannot arise (by changing the airflow over the wing). *
So belt and braces [ US suspenders].
Peter
* In
https://leehamnews.com/2019/09/27/bj...-wire-part-10/
MCAS is not active on the 737 MAX when flaps are deployed. This is because when flaps are out the slats are out as well and these
diminish the disturbance to the pitch moment curve from the larger and further forward-higher slung engine nacelles.