2023 Taipan helicopter crash software upgrade found "unacceptable" risk during safety test.

A safety test found a software upgrade used in an MRH-90 Taipan helicopter crash to be "unacceptable" risk, according to inquiry hearings. The upgrade was tested on the TopOwl helmet worn by pilots during the crash in July 2023, which led to the early retirement of the Taipans last year amid previous fleet-wide groundings and serious incidents. The incident occurred during Exercise Talisman Sabre.