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QF Air Turnback - QE Engineering

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QF Air Turnback - QE Engineering

Old 19th Aug 2020, 04:00
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QF Air Turnback - QE Engineering

I find this one interesting. Qantas Engineering going 'above' the manufactures maintenance recommendations in what I presume was Qantas being 'proactive' and as a result, created a problem that led to an engine mishap. Worse part - Qantas did not inform GE of their practices which seems very odd to me i.e. to confirm if these practices would introduce new issues...

News: Engine surge and vibrations
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Old 19th Aug 2020, 04:43
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Caveat - I have no specific knowledge of the referenced matter.

Generally, an operator will run an NTO (No Technical Objection) request by the OEM before implementing a local protocol. If the OEM has a concern, that should be identified back to the operator. If not, the OEM generally will issue an NTO relating to the request.

It may be that the OEM didn't have all the story and made an inadequate call or that the operator didn't go through the usual processes - I would be surprised if that were the case for QF.
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Old 19th Aug 2020, 04:53
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That does seem odd.

QF Flight Operations consults with Boeing constantly.

Perhaps the "right people" in QF Engineering got "right sized" during the GFC.
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Old 19th Aug 2020, 05:02
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It was an A330 involved , wasn’t it ?
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Old 19th Aug 2020, 05:26
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Originally Posted by blow.n.gasket View Post
It was an A330 involved , wasnít it ?
Say no more then!
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Old 19th Aug 2020, 06:14
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Ah, I thought we were talking about engines, not boeing v airbus? I could be wrong, stood down at the moment, not being paid to think!
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Old 19th Aug 2020, 10:36
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Originally Posted by The Bullwinkle View Post
Say no more then!
Yes it was an A330 airframe, but the issue was the US made engine, as opposed to B787's and their British made engine issues
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Old 20th Aug 2020, 01:11
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From the report - " They sought clarification from the engine manufacturer prior to the occurrence, regarding the suitability of individual replacement, but reported they had not received a response."
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Old 20th Aug 2020, 11:02
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I've finally read the whole report.

From the ATSB News article in Post #1:

An operatorís proactive replacement of worn bushings inadvertently contributed to an Airbus A330ís 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...
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