The reports I've read say that AIPA wrote to the Qantas CEO to say that AIPA has lost confidence in Goyder and the Board. That tactic doesn't make sense to me.
The CEO doesn't hire and fire the Chairman or Board members. It's the other way around. And even if it weren't, the current CEO would be unlikely to sack the Board which appointed her.
The shareholders hire and fire the Board. The shareholders should be firing the lot.