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But there were still plenty of glitches, including an onboard fire during a November 2010 test flight. Smoke had entered the cabin from an electronics panel in the rear of the plane. The fleet was grounded for six weeks. This month's safety problems appear unrelated.
Deliveries were pushed back yet again.
Passengers wouldn't first step aboard the plane until Oct. 26, 2011, three and a half years after Boeing first promised.
That first, four-hour journey — from Tokyo to Hong Kong — was more of a party than a flight. Passengers posed for photos as they climbed stairs into the jet. Alcohol flowed freely. Boeing executives were on hand, showing off the plane's new features. Everybody, it seemed, needed to use the bathroom if only to check out the bidet and giant window inside.
More airlines started to fly the plane. Each new route was met with celebration. Travelers shifted itineraries to catch a ride on the new plane.
Boeing had hoped by the end of 2013 to double production of the Dreamliner to 10 planes a month. There are 799 unfilled orders for the plane, which carries a $206.8 million list price, although airlines often negotiate deep discounts.
Then, this month, all the progress came to a jarring halt.
First, a battery ignited on a Japan Airlines 787 shortly after it landed at Boston's Logan International Airport. Passengers had already left the plane, but it took firefighters 40 minutes to put out the blaze.
Problems also popped up on other planes. There were fuel and oil leaks, a cracked cockpit window and a computer glitch that erroneously indicated a brake problem.
Then a 787 flown by Japan's All Nippon Airways made an emergency landing after pilots learned of battery problems and detected a burning smell. Both Japanese airlines grounded their Dreamliner fleets. The FAA, which just days earlier insisted that the plane was safe, did the same for U.S. planes.
Each new aircraft comes with problems. The A380 had its own glitches, including an in-flight engine explosion that damaged fuel and hydraulic lines and the landing flaps. But the unique nature of the 787 worries regulators.
American and Japanese investigators have yet to determine the cause of the problems, and the longer the 787 stays grounded, the more money Boeing must pay airlines in penalties.
"It's been a very expensive process, and it's not going to let up anytime soon," said Richard Aboulafia, an aerospace analyst with the Teal Group. "At this point, the aircraft still looks very promising. I don't think anybody is talking about canceling orders but people are nervous about the schedule."
As investigators try to figure out the cause of the plane's latest problems the world finds itself in a familiar position with the Dreamliner: waiting.
Scott Mayerowitz can be reached at smayerowitz(at)ap.org.