Rolls said in a statement that the failure was confined to a specific component in the turbine area of the engine. This caused an oil fire. The British company added that it would replace the faulty part. Safety continues to be Rolls-Royce’s highest priority. See their statement
Qantas is grounding its Airbus A380 superjumbos until further notice, and Singapore Airlines is grounding 3 of its A380s. EASA is calling for inspections. See the directive.
What Happened
The cause of the Rolls Royce engine failure has been pinned down to a faulty bearing box, the underlying cause of the oil leak. The bearings allow the drive shaft to move. The leaking bearing box dripped oil into the QANTAS A380 whose engine exploded (uncontained) into the wing, and dropping its turbine onto a house in Batam. The wing damage included electrical cables and hydraulic lines inside the wing, so that pilots were dealing with hydraulic damage (inability to close the landing gear doors), and electrical damage (trouble shutting down the engine beside the damaged one.)
The Qantas meltdown is one of at least five documented A380 engine malfunctions.
- Qantas A388 near Singapore on Nov 4th 2010
- Lufthansa A388 near Frankfurt on Aug 6th 2010, engine shut down in flight
- Emirates A388 near Zurich on Jul 13th 2010, engine shut down in flight
- Singapore A388 near Krakow on Sep 27th 2009, engine shut down in flight
- Singapore A388 near London on May 25th 2009, engine failure
Newer Trent 900 engines have a different bearing box. Although the new box promises to eliminate the problem, newer models also have system software to shut down the engine before the leak causes a meltdown similar to the QANTAS A380 event over Singapore.
George’s Point of View
Although one might say that regulators did not adequately check the engine before approving it for commercial use, I think of Boeing’s response to its recent 787 test flight, and I point out that no one made Boeing step back and pull the 787 back on to the drawing board for more tests and adjustments. Boeing did that, because such remediation is what testing is all about. It is part and parcel of the paradigm of safety in design. It is up to each manufacturer that every item off of their assembly lines be as well designed and as safe as humanly possible. This includes fixing design flaws as soon as they are known. So I wonder, if newer Trent 900 engines have an improved bearing box, this of course begs the question why the older ones were not replaced.
