Not an accident an indecent requiring a SDR be filed. There is no information stated to suggest the source of the fault was the same. Fumes or smoke in the cockpit is much more common than most believe, the response by the airline to send the crew to the hospital is simply to prevent accusation of further liability at a later date. The manufacturer and CAA evaluate and collect SDR's and determine if there is enough of a trend to mandate further action. Of the thousands of heavy aircraft in the skies a few are bound to have a run of bad luck. No need to "flame" on the subject.