Engine manufacturer Rolls-Royce had already identified the potential problem and was talking to customers about providing a solution before Friday’s incident involving a London-bound Airbus superjumbo, they said.

Rolls-Royce said earlier it was working with Qantas to provide support and technical assistance and a spokesman declned any further comment on the cause of the incident.

The location of the leak is seen as significant because it appears to fall in a cooler and less dangerous part of the engine than an internal oil leak which led to a fire and engine explosion on a Rolls-powered Qantas A380 exactly one year ago.

Qantas said earlier the two incidents were not related.