Addis Ababa, Ethiopia – The engine for the Boeing 787 aircraft, which had just been delivered to Ethiopian Airlines in August 2012, had to be replaced because of technical problems a week ago, Fortune learnt.

The next generation General Electric (GEnx) engine that the Dreamliner uses had a problem with its hydraulics and oil leakage, according to sources.

This engine which had its first ran in 2006 by General Electric, was touted to be light weight, fuel efficient, and environmentally friendly reducing carbon emissions.

It is used in Boeing’s B777 and B787 aircraft along with Rolls Royce’s Trent 1000 engine.

General Electric is an American technology and financial services company. Its Aviation segment produces jet engines, aerospace systems and equipment for use in military and commercial aircraft.

The replacement of the Dreamliner engine had taken place at the wide body hangar of the Ethiopian Airlines, where the large B-787 and B-777 aircraft are serviced. There are two other hangars under the national carrier.

American and Japanese technicians from General Electric had flown in to Addis to replace the engine, according to sources close to the issue. Three trained Ethiopian technicians had also assisted in replacing the engine. The process to replace the engine started on Friday, September 21, 2012. Read more