Surely a precision approach is only one that is referenced by ILS/MLS/GLS guidance?
That's right, but this is not an NPA, it is a 3D approach because of the vertical guidance.
I don't fly the 'bus but, if the FDs are providing vertical guidance on the Baro-VNAV path and (pretty accurate) lateral NAV guidance, why wouldn't you leave them on?
Leaving FDs on in HDG/VS mode is SOP at this operator flying an RNP AR approach.
I didn't notice any mode changes...
That voice...