Boeing Co’s 787 Dreamliner jet suffered a third mishap in as many days on Wednesday, heightening safety concerns after a string of setbacks for the new aircraft.

Japan’s All Nippon Airways said it was forced to cancel a 787 Dreamliner flight scheduled to from fly from Yamaguchi prefecture in western Japan to Tokyo due to brake problems.

That followed a fuel leak on Tuesday that forced a 787 operated by Japan Airlines to cancel take-off at Boston’s Logan International Airport, a day after an electrical fire on another 787 after a JAL flight to Boston from Tokyo.

Asian customers rallied behind the U.S. planemaker, however, saying such teething troubles were not uncommon on new planes and confirming they had no plans to scale back or cancel orders for the aircraft, which has a list price of $207 million.

Japan is by far the biggest customer for the Dreamliner to date, with JAL and All Nippon Airways (ANA) operating a total of 24 of the 49 new planes delivered to end-December. The aircraft entered commercial service in November 2011, more than three years behind schedule after a series of production delays. Boeing has sold 848 of the planes.

JAL spokesman Kazunori Kidosaki said the carrier, which operates seven Dreamliners, had no plans to change orders it has placed for another 38 aircraft. ANA, which has 17 Dreamliners flying its colors, will also stick with its orders for another 49, spokesman Etsuya Uchiyama said.

State-owned Air India, which on Monday took delivery of the sixth of the 27 Dreamliners it has ordered, said precautionary measures were already in place and its planes were flying smoothly. “It’s a new plane, and some minor glitches do happen. It’s not a cause of concern,” said spokesman G.Prasada Rao.

There was no immediate suggestion that the 787 Dreamliner, the world’s first passenger jet built mainly from carbon-plastic lightweight materials to save fuel, was likely to be grounded as investigators looked into the fire incident.

Air China, which sees the 787 as a way to expand its international routes, and Hainan Airlines also said they were keeping their orders for 15 and 10 of the planes.

“New airplanes more or less will need adjustments, and currently we have no plans to swap or cancel orders,” said an executive at future 787 operator Hainan Airlines, who was not authorized to talk to the media and did not want to be named.

Qatar Airways Chief Executive Akbar Al Baker, who has previously criticized technical problems or delays with Boeing or Airbus jets, said there were no technical problems with the five 787s currently in use by the Gulf carrier.

“It doesn’t mean we are going to cancel our orders. It’s a revolutionary airplane,” he said.

Other carriers already flying the Dreamliner are Ethiopian Airlines, LAN Airlines, LOT Polish Airlines and United Airlines.

40 GALLON SPILL

The fuel leak on Tuesday was noticed at about 12:25 p.m. ET (1725 GMT) after the plane had left the gate in preparation for take-off to Tokyo. About 40 gallons spilled, and the jet was towed back to the gate, where passengers disembarked, said Richard Walsh, a spokesman for the transportation authority.

The plane departed about four hours behind schedule and was due to arrive in Tokyo on Wednesday evening.

No passengers or crew were injured in either incident, though firefighters were called out on both occasions.

Boeing shares fell nearly 2.7 percent on Tuesday, following a 2 percent drop on Monday – wiping around $2.8 billion off its market value, or more than a dozen Dreamliners at list price.

While many Wall Street analysts rate Boeing stock a ‘buy’ or ‘outperform’ – the manufacturer has delivered jets faster than the market predicted – some noted the potential for the combination of a fire and a fuel leak to affect public perception of Boeing and the new aircraft.

(Reuters)