I am searching for:

  1. The use of CSTR PB on Airbus FCU &
  2. During what phase is it used?



It's a Constraints button that When pressed shows altitude or speed constraints at a certain waypoint.

It would normally be used on departure or arrival from or into an airport when there are many constraints that need to be met.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.