Over 60 percent French have lost confidence in finding the true cause for Monday's disappearance of Air France Flight AF447, a latest poll published on Thursday showed.

Among the 18,604 persons inquired by French daily Le Figaro, 61percent answered "no" to the question that "Do you think it is possible to recover what caused the crash."

The major reason for their negative answers, they said, was the authorities' announcement that as there were massive difficulties in recovering the plane's black box recorders, people might never know the real reason for the disaster.

Some respondents expressed worries that some people might take earlier hypotheses on the cause of the crash as facts, making it impossible to find the truth.

On the other hand, 39 percent respondents gave positive answers, pinning their hopes on high technology and expertise in the 21st century.

Some people in the survey insisted that it was important to find the cause of the accident, to prevent similar tragedies in the future.

Air France Flight AF447, an Airbus A330, vanished early Monday morning over the Atlantic Ocean en route to Paris from Rio de Janeiro, with 228 people on board.

(Xinhua News Agency June 5, 2009)