A dozen flights from Heathrow airport had been canceled early Friday in the continuing disruption caused by a crash landing at Europe's busiest airport. Investigators were analyzing why a British Airways Boeing 777 made a crunching touchdown short of the runway on Thursday, ripping off the plane's landing gear and severely damaging the two engines and wings. Nineteen injuries were reported among the 152 people aboard. The crumpled aircraft remained at the end of one of Heathrow's two runways Friday. British Airways said it expected to operate all of its long-haul flights from Heathrow on Friday and 90 percent of short-haul operations. "The number of flight cancellations at Heathrow so far today is 12, affecting short-haul services," airport owner BAA PLC said at 0630 GMT.