http://www.lesoir.be/actualite/belgi...5-603435.shtml
In French.
To summarize, the writer states that the Service fédéral de la Mobilité concluded that a loss of power on one engine was experienced during take-off.
Based on the first reports (Pilot in charge and ATC), it is likely that an engine surge occurred which I haven't found in the report published yesterday.
As for the safety margin in the industry, the purpose of taking into account a safety factor which might range from 1,5 to 5 times is to cope with lack of accuracy of the data fed to the computation. Safety coefficients decreased last century with the extended use of computers.
Comments welcome and regards.
Willy