US 787 probe puts spotlight on Arizona battery firm

Boeing 787 Dreamliner

Tucson, Arizona-based Securaplane Technologies Inc, which makes a charger for batteries used on the Boeing Co's 787 Dreamliner, said on Sunday it would support an investigation into battery issues that have grounded the new planes.

Securaplane, a unit of Britain's Meggitt Plc, first began working on the charger in 2004, but suffered millions of dollars of damages in November 2006 after a lithium-ion battery used in testing exploded and sparked a fire that burned an administrative building to the ground.

The U.S. National Transportation Safety Board on Sunday ruled out excess voltage as the cause of a battery fire on the 787 at the Boston airport this month.

It said investigators would travel on Tuesday to Tucson, Arizona, where Securaplane is based, to test and examine the charger and download memory from the controller for the auxiliary power unit. They also plan to travel to Phoenix and carry out similar tests at the site where a unit of United Technologies Corp builds the power unit.

Fiona Greig, a spokeswoman for Securaplane, said the company had been invited to "contribute to the investigation process" and planned to fully support it.

"In line with the NTSB's practices, however, it would not be helpful to that investigation to comment further," she said in a statement provided to Reuters.

The U.S. Federal Aviation Administration (FAA) on Sunday said it had investigated safety complaints leveled by a former Securaplane employee in 2008 and 2009 but determined that the allegations focused on prototypes that were not ultimately used in the new lightweight airliner.

Shubhayu Chakraborty, president of Securaplane, earlier told Reuters that his company's lithium-ion battery charger was currently only in use on the Boeing 787, although it is developing different systems for use on other aircraft.

Securaplane is building a lithium-ion battery system for the KC-390 military transport plane being developed by Brazil's Embraer SA, which is due to have its first flight in 2014. Embraer declined comment.

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