I've finally read the whole report.
From the ATSB News article in Post #1:
An operator’s proactive replacement of worn bushings inadvertently contributed to an Airbus A330’s engine experiencing excessive vibration, an ATSB investigation found.
No, it didn't!
What a shocking article.
The investigation found that the operator's proactive replacement of worn bushings had NOTHING to do with the engine incident, as no bushings on that engine had been replaced.
In fact, the ATSB have no idea what caused the incident, nor do they have any idea what caused an identical incident the previous year.
The ATSB went on to criticise the operator for replacing worn bushings, on the grounds that if worn bushings were replaced, the operator would never know when they had reached the 50% threshold of worn bushings required for replacement of a complete set.
Unless, of course, the operator kept a record of bushing replacements...
