> Ned wrote:

>>  From the ATSB prelim report -

>

>> Table 2: Details of the passenger oxygen cylinders fitted to VH-OJK at the
>> time of the occurrence
>> Location Serial No. Manufactured date Fitted to aircraft date
>> Right side #1 240341 Feb 92         16 Jun 07
>> Right side #2 ST30395 Oct 01         14 Jun 08
>> Right side #3 ST20539 Apr 01         19 Jan 07
>> Right side #4 535657 Feb 96         4 Jun 08
>> Right side #5 666845 Mar 99         01 Mar 06
>> Right side #6 240293 Dec 91         07 Jan 08
>> Right side #7 239949 Nov 91         07 Jan 08
>> R Fwd O/H 883198 May 89 07         Jan 08
>> L Fwd O/H 686764 May 98 01         Sep 06
>> R Mid O/H 805949 Sep 04 17         Nov 07
>> L Mid O/H 686716 Jun 99 28         Sep 05
>> R Aft O/H 679454 Apr 99 07         Jan 08
>> L Aft O/H 71505 Jan 91 22         Jul 07

>

>> I find it somewhat curious that with this level of detail, that neither
>> of the
>> words "inspected" or "tested", appear anywhere in the report.

>

>> Surely an organization with QANTAS much vaunted "safety culture" would
>> have a
>> record of when and where these bottles, some of them near 18 years old -
>> and
>> some older - were tested in accordance with CAR - wouldn't they?

>

>> And if so why not include it in the report.

>

>> Surely these dates are way more relevant than the date the bottle was
>> fitted to
>> the aircraft??

>

>> After all, I can't get my LP BBQ bottle refilled without evidence of
>> inspection.

>

>> Ned

>
> Did you also note that the cylinders are filled to a pressure of 1850psi
> and minimum 2.87 mm (0.113 inch) wall thickness.
>
> And you guessed that your LPG bottle does not have that pressure either.
>
> Gas cylinders (CIG) have something like 2500psi are a much thicker wall
> and tested on a regular basis.
>
> I can think of a few reasons metallurgically why they can fail. Pitty
> they don't have the bottle. They still have to find a reason as the why
> it failed. Is there any other instances of this type of failure.
>
> r