As Rolls Royce revealed that some 40 Trent 900 engines would require replacement on airlines using A380s across the globe, Qantas Airways gave indications that the national carrier would need to replace up to 14 engines currently employed by its entire A380 fleet, which remain grounded at this time.

Qantas chief executive Alan Joyce announced on Thursday that all its A380s would be inspected for possible engine swap but the airline still waits for the formal notice from Rolls Royce as to when the actual modifications would be undertaken.

Mr Joyce said that Rolls Royce is still determining which specific engines on the airline's A380s would require dismantling and replacement but he assured reporters gathered in Sydney that Qantas is in constant communication with the engine maker.

He is hoping that Rolls Royce would soon come up with specifics on the engine replacement scheme which should then enable Qantas to determine a particular timeline for its fleet of A380s continued grounding, though he conceded that the prohibition could still last for a few more days.

Qantas' six A380s were grounded on November 4 following an oil leak on a flight's engine that led to its blow out, which was followed by succeeding engine troubles on other A380s that stretched in a two-week span.

The superjumbos grounding, according to Qantas, had resulted to a four percent capacity reduction for the airline but Mr Joyce shared that they have made some adjustments to cope with the situation, specifying that "we have taken about four to five per cent of capacity off by scaling down the size of aircraft."

Qantas said that financial impacts of its current engine woes would be dealt with once the figures have been determined and its A380s start flying again as Mr Joyce revealed that the responsibility of maintaining Trent 900 engines being used by airlines rests on Rolls Royce.

While the engine maker has already identified the cause of the problem and has implemented changes on the design and manufacture of its new A380 engines to prevent oil leaks in the future, Rolls Royce has yet to implement the modifications on engines already installed on Qantas' A380s.

Qantas said that as precautionary measures, all Trent 900 engines would be taken off from its aircrafts pending the implementation of the modification, with the airline taking a step further by advising Airbus to replace a number of Rolls Royce engines with new ones on aircrafts ordered by the company but have yet to be delivered.