European aviation regulators on Monday refocused their directive to check the engines on Airbus 380 planes, turning instead to the oil tubes that lubricate the Rolls-Royce Trent 900 engine, dpa reported.
The Trent 900 has been in the spotlight ever since one caught fire on a Qantas A380 on November 4, blowing off a casing, damaging a wing and control lines and leading to an emergency landing in Singapore.
The European Aviation Safety Agency in Cologne, Germany said it was revising its November 10 emergency airworthiness directive to world airlines to check the engines every 20 flight cycles.
The first directive required mechanics to check four parts of the engine: turbine blades, a case drain, an air buffer cavity and oil service tubes in order to detect any abnormal oil leakage.
The second directive says mechanics now only have to do close study of the latter two parts: the air buffer cavity and oil tubes.
"The incident investigation has progressed and inspection data from in-service engines has been gathered and analysed. The results of this analysis show the need to amend the inspection procedure," EASA said in the revised statement.
A spokesman said the incident investigation was still continuing.
"The requirements ... are considered interim action as the investigation led by the Australian Transport Safety Bureau (has) yet to deliver its final conclusions," the statement said.
Rolls-Royce has said that the failure was confined to a component in the turbine.
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