Abidjan: A mid-flight engine failure forced an Air France A380 jet with more than 500 passengers on board to turn back to the Ivory Coast capital, Abidjan, where it landed without further incident early on Sunday.

"We were flying over Niger (to Paris)... I saw a ball of flame for a few seconds and then a large bang on the left side of the aircraft," Baudelaire Mieu, a journalist with Bloomberg News, told AFP.

Technically, it is what is called an engine blow-out. It is a well known problem

- West Africa Jean-Luc Mevellec, Air France-KLM manager, on Air France return to Abidjan

"The plane began to roll, everything was shaking and people started to panic. The pilot came on and said 'We have just lost a left side engine. We are returning to Abidjan," Mieu said.

The Air France-KLM manager for West Africa Jean-Luc Mevellec confirmed the incident.

"Technically, it is what is called an engine blow-out. It is a well known problem," Mevellec told AFP.

"It happens from time to time. It is a well known phenomenon, well understood and crew are well trained on simulators all year long to deal with this time of fault," he added.

Mieu said the giant four-engined aircraft, the world's biggest passenger jet, "continued to vibrate all the way back to Abidjan. People were praying."

"It was a close call. I have never been so frightened!"