WASHINGTON Jan 20 U.S. officials investigating
a battery fire on a Boeing Co 787 Dreamliner will travel
to Phoenix, Arizona, for equipment tests at a facility run by
Pratt & Whitney, a unit of United Technologies Corp, a
spokesman for the U.S. National Transportation Safety Board said
NTSB spokesman Peter Knudson said investigators would carry
out functional testing and memory downloads of the auxiliary
power unit, or APU, built by Pratt & Whitney Power, known as
Hamilton Sundstrand until United Technologies took over Goodrich
last year. He said he did not have a date for that trip.
The safety board earlier 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 the maker of the battery charger, Securaplane, a
unit of Britain's Meggitt Plc is based.