Whilst I agree Aldee,
it clearly shows itself as a knee jerk reaction.
How many other countries issued an AD grounding the -7 fleet?
Maybe better handled as a Service Bulletin, bringing awareness to the potential problem, and getting people to pay more attention, with an AD maybe pending.
Not saying CAANZ and CASA were wrong in their decisions, but they certainly weren't 100% wrong either..... Just a poorly handled response to an active investigation's observation......its too early to even declare it a finding.