The Airbus presentation to accident investigators of the damage done to QF32 on November 4 gives new technical insights into this near disaster involving a Qantas A380 with 466 persons on board.

The examination of the damage is far from complete, as the presentation makes clear. It doesn’t deal with the other dimensions of this serious incident, which are the loss or impairment of various systems on the giant airliner, and the emerging difficulties the crew faced from fuel load imbalance caused by some of those failures.

The diagrams need to be compared to the photos shown later in this report

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One thing needs to be kept firmly in mind. Rolls-Royce, the maker of the Trent 900 engine which disintegrated, knew about the faults that the current airworthiness directive concerning these engines says are likely to have caused an intense oil fire in a structural cavity in the intermediate pressure turbine area of the engine.

Rolls-Royce had designed and was introducing a fix for the oil leak issues for this into the engines at its own speed. Qantas was left in the dark. It is fair to suggest that Qantas needs to review relationships with engine manufacturers in which it pays for power by-the-hour and leaves much of the maintenance and oversight of those engines to the designer and manufacturer.

To emphasise the obvious: the interests of the engine maker and holder of the service agreements are not the same as those of the airline. A carrier might want to correct and replace inadequate design features to a different, more urgent timetable that the party that benefits from the support contract, and has its own brand image to protect.