> From the ATSB prelim report -
>
>
> 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??
> ...

> 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
> ...

> 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

>> You've got the very next best thing though. All of the other bottles
>> on the plane which should have the same number of hours and cycles -
>> as well as thousands of similar (and older) bottles around the world.

>
> Dave, there's a table in the PDF report that lists all the bottles
> that were on OJK at the time, with manufacturing dates, serial numbers,
> etc. They're not all from the same batch, actually they vary widely
> in age (and so probably cycles, etc). The report says there were about
> 90-odd bottles in the batch that the failed on came from, and words...

> 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 ...

> "Rob" mine.com.au> wrote in message
>
> news:48b87a64$1_9@news.peopletelecom.com.au...
>

>> 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

> ...

> On Aug 30, 6:38 am, Rob mine.com.au> wrote:

>> 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 understand that, but they can't fully determine exactly what has
> occurred to this bottle. Physical damage(scratches), actual wall
> thickness, inclusions in the material, correct heat treatment, so many
> things.
>
> It will be interesting what they come up with.
>
> Has anyone found the manufacturing specifications as yet?
>
>
> r

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