As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, 3 OF 4 VALVE WINDOWS FAILED BY SEPARATING AT SEAMS. UPON SEPARATION, REMAINING WINDOW MATERIAL MELTED AWAY, THUS CREATING 3 LARGE HOLES IN THE TOP OF THE BALLOON, WHICH RAISED INTERNAL TEMP, AND CAUS HIGH (EXTREME) FUEL CONSUMPTION AND RENDERED THE AIRCRAFT UNCONTROLABLE AND UNAIRWORTHY. ALL ABOVE WITHIN 42 MINUTES OF FLIGHT.