Business

January 30, 2013

U.S. investigators ask Boeing for battery history

U.S. investigators said Jan. 30 they asked Boeing to provide a full operating history of lithium-ion batteries used in its grounded 787 Dreamliners after Japan’s All Nippon Airways revealed it had repeatedly replaced the batteries even before overheating problems surfaced.

National Transportation Safety Board spokesman Peter Knudson said the agency made the request after recently becoming aware of battery problems at ANA that occurred before two recent incidents involving the planes batteries. Boeing has already collected some of the information, he said.

All 50 of the Boeing 787s in use around the world remain grounded after an ANA flight on Jan. 16 made an emergency landing in Japan when its main battery overheated. About a week before that, a battery caught fire in a 787 parked at Boston’s Logan International Airport.

ANA said it had replaced batteries on its 787 aircraft some 10 times because they didn’t charge properly or connections with electrical systems failed, and informed Boeing about the swaps. Japan Airlines also said it had replaced 787 batteries. It described the number involved as a few but couldn’t immediately give further details.

The 787 is the first airliner to make wide use of lithium-ion batteries. They are prone to overheating and require additional safeguards to prevent fires. However, ANA spokeswoman Megumi Tezuka said the airline was not required to report the battery replacements to Japan’s Transport Ministry because they did not interfere with flights and did not raise safety concerns.

Boeing said Wednesday that replacing the batteries on a plane is not uncommon. The company said that it has not “seen 787 battery replacements occurring as a result of safety concerns.”

The ANA spokesman also said that replacing batteries on aircraft was not considered out of the ordinary.

Laura Brown, a spokeswoman for the U.S. Federal Aviation Administration, said in Washington that the agency was checking whether the previous battery incidents had been reported by Boeing.

GS Yuasa, the Kyoto, Japan-based manufacturer of the batteries, said it could not comment.

With 17 of the jets, ANA was Boeing’s launch customer for the technologically advanced airliner. The airline has had to cancel hundreds of flights, affecting tens of thousands of people, but has sought to minimize disruptions by switching to other aircraft as much as possible. ANA and Japan Airlines are among the biggest customers for the 787 and Japanese manufacturers make about 35 percent of the aircraft.

Boeing said batteries on the 787s were returned because of safety mechanisms that make sure the batteries can’t be used if they have been deeply-discharged or improperly disconnected.

Some batteries have also been returned because they exceeded their shelf life, the company said.

The battery problems experienced by ANA before the emergency landing were first reported by The New York Times.

Japanese and U.S. investigators looking into the Boeing 787′s battery problems shifted their attention this week from GS Yuasa to the manufacturer of a monitoring system. That company, Kanto Aircraft Instrument Co., makes a system that monitors voltage, charging and temperature of the lithium-ion batteries.

On Tuesday, the NTSB said it was conducting a chemical analysis of internal short circuiting and thermal damage of the battery that caught fire in Boston.

The probe is also analyzing data from flight data recorders on the aircraft, the NTSB said in a statement on its website.

LOT Polish Airlines and Ethiopian Airlines, two of the eight international carriers that fly the 787, said in separate statements Jan. 30 that they had not experienced any problems with the plane’s lithium ion batteries.

 




All of this week's top headlines to your email every Friday.


 
 

 

Headlines July 30, 2014

News: Software to power F-35 running as much as 14 months late¬†- Software needed to operate Lockheed Martin’s F-35 jet, the Pentagon’s costliest weapons system, may be as much as 14 months late for required flight testing, according to a Pentagon review.   Business: Lockheed will turn on JLTV production line In August; 6-D truck...
 
 

News Briefs July 30, 2014

U.S. military deaths in Afghanistan at 2,197 As of July 29, 2014, at least 2,197 members of the U.S. military had died in Afghanistan as a result of the U.S.-led invasion of Afghanistan in late 2001, according to an Associated Press count. At least 1,819 military service members have died in Afghanistan as a result...
 
 
Lockheed Martin photograph by Tom Reynolds

F-35B successfully completes wet runway, crosswind testing

Lockheed Martin photograph by Tom Reynolds F-35B aircraft BF-4, piloted by Lockheed Martin Test Pilot Dan Levin, starts down the runway as part of wet runway and crosswind testing at Edwards AFB, Calif. In an important program ...
 

 
boeing-chinook

Boeing delivers first U.S. Army multiyear II configured Chinook

Boeing July 29 delivered the first multiyear II configured CH-47F Chinook helicopter to the U.S. Army one month ahead of schedule. The delivery was celebrated in a ceremony at the production facility in Ridley Township, Penn. ‚...
 
 
Army photograph by SSgt. Angela Stafford

Engineers developing safer, more accurate tracer round

Army photograph Tracer rounds enable the shooter to follow the projectile trajectory to make aiming corrections. However, the light emitted by these rounds also gives away the position of the shooter. Engineers at Picatinny Ars...
 
 
NASA photograph by Carla Thomas

Katherine Lott awarded NASA Armstrong employee scholarship

NASA photograph by Carla Thomas Katherine Lott, the recipient of the 2014 NASA Armstrong Employee Exchange Council Joseph R. Vensel Memorial Scholarship, is congratulated by NASA Armstrong center director David McBride. Flankin...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>