Rolls-Royce says one part caused Qantas A380 blow-out
Rolls-Royce has said that a mid-air engine explosion during an A380 super-jumbo jet flight to Australia resulted from a single faulty component.
Rolls said it was correcting the fault, which is specific to its Trent 900 engine model and is not an issue on other engines.
The statement helped allay investors' concerns, with Rolls-Royce shares up almost 4% in midday trading.
But Rolls added that the problems were set to hit profit growth this year.
Australian airline Qantas grounded its fleet of six A380s after an engine broke apart on a flight to Australia on 4 November.
The plane was forced to make an emergency landing in Singapore, and the incident forced all A380 operators to check their planes.
Rolls-Royce said its investigations had led "to two key conclusions".
First, that only the Trent 900 was affected; second, that the engine failure "was confined to a specific component" which led to an oil fire and loss of turbine pressure.
Rolls-Royce said that corrective measures would "enable our customers progressively to bring the whole fleet back into service".
Profits to slow
The company's shares fell sharply immediately after the Qantas engine incident, in part because of concerns about a lack of information from Rolls-Royce about the cause.
However, following the latest update from the company, its shares rose in Friday morning's trading session.
The increase came despite Rolls' chief executive, Sir John Rose, saying that the engine problems would "have an impact on the group's financial performance this year".
In July, the company indicated that underlying profit growth for the year would be about 4%-5%.
But this will now by "slightly lower than previously guided," Rolls-Royce said.
Qantas' A380s are still grounded, but the airline said in a statement said that it hoped "it will be days rather than weeks before we are able to return the aircraft to service".
The carrier added: "It will take several days for Rolls-Royce to identify relevant engines as far as this modification is concerned and to source the necessary components."
Meanwhile, European planemaker Airbus, which makes the A380, said that deliveries of the aircraft may be affected by the engine problems.
"I would not rule out some impact on the delivery schedule," chief executive Tom Enders said. "I don't know how severe that would be."
But he added that he did not expect the engine incident to damage the reputation of the world's largest passenger aircraft.
"It is not an incident that makes us or airlines happy but I am absolutely sure, given the positive reception received so far from airlines and passengers... that the reputation of the aircraft will remain untarnished and increase in years ahead," Mr Enders said.
The comments came as Airbus's parent company, EADS, posted third-quarter profits of 13m euros ($18m; £11m), up from a loss of 87m euros for the same three months last year.
The Franco-German aerospace and defence company said its main revenue growth over the next few months would come from commercial aircraft sales.
Airbus took orders for 380 aircraft in the nine months to the end of September. It must deliver four more A380s to meet its target of handing over 20 of the super-jumbos to airlines by the end of 2010.