......nor is that the missing bottle was checked and tested in recent memory. Check the final report on that.
You don't need to check the final report. They've already said that the bottle had recently been serviced, and had been installed in OJK about 5 weeks prior to the incident.
26 May 2008 Inspection and fifth hydrostatic testing – accepted
14 Jun 2008 Refitted to VH-OJK (right sidewall #4)
From the interim report, page 26.