As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A FUEL CELL SEAM FAILED WHILE ACFT WAS PARKED ON THE RAMP EMPTYING THE CONTENTS SUDDENLY. THERE WERE NO PRIOR INDICATIONS OF A PREFAILURE SUCH AS LEAKS NOTED. THERE WERE NO INDICATIONS OF IMPROPER INSTALLATION OR OTHER DAMAGE. THE BULK OF THE FUEL FOLLOWED THE MAIN SPAR INTO THE BELLY OF THE ACFT THEN OUT THROUGH DRAIN HOLES, VENTS, AND SEAMS IN THE SKIN. (K)