TOKYO (Reuters) - Japan's two leading airlines grounded their fleets of Boeing 787s on Wednesday after one of the Dreamliner passenger jets made an emergency landing, the latest in a series of incidents to heighten safety concerns over a plane many see as the future of commercial aviation.
All Nippon Airways Co said instruments aboard a domestic flight indicated a battery error, triggering emergency warnings to the pilots. Shigeru Takano, a senior safety official at the Civil Aviation Bureau, said a second warning light indicated smoke.
Wednesday's incident, described by a transport ministry official as "highly serious" - language used in international safety circles as indicating there could have been an accident - is the latest in a line of mishaps - fuel leaks, a battery fire, wiring problem, brake computer glitch and cracked cockpit window - to hit the world's first mainly carbon-composite airliner in recent days.
"I think you're nearing the tipping point where they need to regard this as a serious crisis," said Richard Aboulafia, a senior analyst with the Teal Group in Fairfax, Virginia. "This is going to change people's perception of the aircraft if they don't act quickly."
ANA, which said the battery in the forward cargo hold was the same lithium-ion type as one involved in a fire on another Dreamliner at a U.S. airport last week, grounded all 17 of its 787s, and Japan Airlines Co suspended its 787 flights scheduled for Wednesday and Thursday.
The two airlines, which operate around half of the 50 Dreamliners delivered to date, said they would decide on Thursday whether to resume Dreamliner flights the following day.
COMPREHENSIVE REVIEW
The 787, which has a list price of $207 million, represents a leap in the way planes are designed and built, but the project has been plagued by cost overruns and years of delays. Some have suggested Boeing's rush to get planes built after those delays resulted in the recent problems, a charge the company strenuously denies.
Both the U.S. Federal Aviation Administration (FAA) and the National Transportation Safety Board (NTSB) said they were monitoring the latest incident as part of a comprehensive review of the Dreamliner announced late last week.
ALARM TRIGGERED
ANA flight 692 left Yamaguchi in western Japan shortly after 8 a.m. local time (2300 GMT Tuesday) bound for Haneda Airport near Tokyo, a 65-minute flight. About 18 minutes into the flight, the plane descended and made an emergency landing 16 minutes later, according to flight-tracking website Flightaware.com.
A spokesman for Osaka airport authority said the plane landed at Takamatsu at 8:45 a.m. All 129 passengers and eight crew evacuated via the plane's inflatable chutes. Chief Cabinet Secretary Yoshihide Suga said five people were slightly injured.
At a news conference - where ANA's vice-president Osamu Shinobe bowed deeply in apology - the carrier said a battery in the forward cargo hold triggered emergency warnings to the pilots, who decided on the emergency action. "There was a battery alert in the cockpit and there was an odd smell detected in the cockpit and cabin, and (the pilot) decided to make an emergency landing," Shinobe said.
In a statement later, ANA said the main battery in the forward electrical equipment bay was discolored and there were signs of leakage.
Passengers leaving the flight told local TV there was an odor like burning plastic on the plane as soon as it took off. "There was a bad smell as soon as we started and before we made the emergency landing there was an announcement and the stewardess' voice was shaking, so I thought this was serious," one passenger told TBS TV.
Another man told a local broadcaster: "There was a strong, burning smell, but the smoke appeared after they opened the emergency doors, after we landed."
Marc Birtel, a Boeing spokesman, told Reuters: "We've seen the reports, we're aware of the events and are working with our customer."
Robert Stallard, analyst at RBC Capital Markets, said lost revenue at the Japanese airlines could prompt compensation from Boeing. "What started as a series of relatively minor, isolated incidents now threatens to overhang Boeing until it can return confidence, and this looks to be a near-term challenge given the media's draw to all things 787," he said.
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