As it was, the shrapnel appears to have damaged electrical cables and hydraulic lines inside the wing, Goglia said. Pilots were unable to close the landing gear doors, an indication of hydraulic damage, and had difficulty shutting down the engine next to the engine that disintegrated, an indication of an electrical problem, he said. The A380 has four engines.
Photos and video of the incident and its aftermath show the shrapnel clearly ruptured a hydraulic line and an electric line in the wing, cutting off the pilots' control of half the brake flaps and the remaining engine on the affected wing, along with the door of the landing-gear compartment, said Joerg Handwerg, a spokesman for the pilots' union for Lufthansa.
In its trading update Friday, London-based Rolls-Royce said the incident will cause full year profit growth "to be slightly lower than previously guided," but it also said that the company's other operations will help to offset any losses. Back in July, the company said that its underlying profits would grow by 4-5 percent compared to 2009.
Shares in the company rose after the update - a signal that investors are happy to see a definitive statement after days of silence from the world's second-biggest engine maker behind General Electric and one of the last globally important industrial manufacturing companies in Britain.
Rolls-Royce shares were up 4 percent at 607.5 pence ($9.74) in midmorning trade on the London Stock Exchange.
Handwerg said that minor problems are routine for any jet engine, but it is possible that the issues were an indication that regulators did not adequately check the engine before approving it for commercial use.
"When you see we have a problem with not just one of these engines but several then it points towards that we have a problem in the certification process," Handwerg said.
Associated Press Reporters Michael Weissenstein in London and Joan Lowy in Washington contributed to this report.
Rolls-Royce has indicated that number to be 40 engines worldwide.
A380s would be kept off routes to Los Angeles from Australia's two largest cities - Sydney and Melbourne.
European manufacturer Airbus, which on Monday predicted about $3.2 trillion (euro2.4 trillion) in new aircraft will be needed over the next 20 years.
Engineers have discovered oil leaks in the turbine area of three engines on three different A380s.