US safety board probes Boeing 787 battery - lithium ion battery manufacturers

S. security officials investigating a battery fire on a Boeing 787
A one-day public hearing to study the groundbreaking lithium
Design and approve the use of an ion battery system.
787 three months after a global shutdown due to overheating of the battery, the National Transportation Safety Board (NTSB) is reviewing a demonstration by Boeing, contractors and the Federal Aviation Administration (FAA.
"NTSB is holding a hearing to explore the original design and certification of the battery," said Debbie Hersman, chairman of the safety committee on Tuesday . ".
"We are here to understand why after the design planning and certification process led by one of the world's leading manufacturers, 787 of the batteries had an unexpected failure --
Respected by the international aviation community.
"Investigators have not yet determined the cause of the fire on the battery of air Japan line 787, which was parked at Boston airport on January 7, which was an incident investigated by NTSB.
On January 16, after battery smoke forced the full-day air carrier 787 aircraft to make an emergency landing in Japan, the FAA and other regulators ordered All 50 Boeing 787 aircraft to be grounded.
Last Friday, the FAA approved Boeing's battery repair program, an important step in restoring this cut --
Flying to the edge of the sky
On Tuesday, the European Aviation Safety Agency announced approval for the transformation of the Boeing battery system.
Japanese regulators said on Tuesday that a final decision would be made as early as this week to allow flight 787 to fly.
"After studying the results of the NTSB hearing, we will finally decide whether to resume operations," Transport Minister Ota hiro Ota told reporters in Tokyo . ".
The largest 787 carriers, air all and Japan Airlines, have begun replacing new battery systems on troubled aircraft after the FAA approved the changes.
As airlines resume their flights on June, it may take two months to revise, ANA said.
JAL did not give a timetable to restart the flight.
United Airlines is the only American airline on Flight 787.
At Tuesday's NTSB hearing, officials heard about lithium-
Ion batteries and FAA certification processes that rely heavily on Boeing's tests and conclusions.
The FAA approves the use of batteries under "special conditions", stating that there are not sufficient or appropriate safety standards in the airworthiness regulations.
Critics believe that the FAA is too dependent on company testing and should strengthen its own regulation.
NTSB chief Hersman said the safety committee is looking for "lessons learned not only for the design and certification of failed batteries, but also for the knowledge that can be applied to emerging technologies in the future"
"Today, with the rapid development of new technologies and the increasing complexity of components and systems, it is more important than ever to understand how best to supervise their development and certification.
Boeing shares rose 1.
Afternoon trade in New York was 4%.
The company will report first-
Quarterly earnings before Wednesday's opening.