In this hand hout computer-generated image provided by Boeing shows the company's new series Boeing 787 Dreamliner, Wednesday, April; 27, 2005. A senior Boeing Co. official on Wednesday brushed off the threat of European rival Airbus SAS's "superjumbo," saying orders for Boeing's smaller, more fuel-efficient Dreamliner were robust. (AP Photo/Boeing) ** EDITORIAL USE ONLY **
Boeing shares have fallen almost 3 percent in Wednesday trading.
Boeing spokeswoman Loretta Gunter says the company will stick to ground tests until it can pinpoint the cause of the incident.
The shares dropped $1.85, or 2.7 percent, to $67.40. In percentage terms, it was the worst performer in the Dow Jones industrial average.