The ATSB could not replicate the explosion.
The Australian Transport Safety Bureau (ATSB) says it has found no evidence of systemic safety problems with oxygen bottles like those involved in a Qantas incident last year.
An oxygen cylinder blew a hole in a Qantas jumbo jet on a flight from Hong Kong to Melbourne in July.
Flight QF30 was forced to land in Manila after an explosion blew a gaping hole in the side of the plane in front of the starboard wing.
A preliminary report confirmed that an exploding oxygen tank was responsible for the incident and that some oxygen masks failed.
Another interim report released today, says the ATSB have not been able to replicate the cylinder failure, using five oxygen cylinders obtained from the same manufacturing lot.
The original one was lost over the South China Sea.
The ATSB is continuing to conduct tests on the cylinders, examining them for mechanical and manufacturing flaws.
The ATSB's final report is expected some time next year.