The All Nippon Airways (ANA) Boeing 787 lithium ion battery that failed
Jan. 16 exhibits signs of “thermal runaway,” according to Japanese
investigators. Additionally, Boeing is asking US FAA to allow it to
conduct 787 test flights.
The Japan Transport Safety Board (JTSB) told reporters that the badly burned ANA 787 battery experienced an “uncontrollable high temperature” associated with thermal runaway, according to multiple reports from Tokyo. The US National Transportation Safety Board (NTSB) has said the Japan Airlines (JAL) 787 lithium ion battery that sparked a fire in Boston Jan. 7 similarly shows indications of thermal runaway.
The JTSB and NTSB both have been unable to determine a root cause of the lithium ion battery failures.
As part of the effort to determine what happened on the two aircraft and facilitate the process of lifting the worldwide Dreamliner grounding, Boeing is asking FAA for permission to operate 787 test flights. An application for 787 test flights is “under evaluation” by FAA, a Boeing spokesperson told ATW. The company is not commenting further on the proposed flight testing.
The ANA event—involving the main battery in the forward electronic equipment bay—occurred inflight and caused an unusual smell to permeate the aircraft, prompting an emergency landing. The JAL 787 event—involving the battery used to start the auxiliary power unit—led to an onboard fire while the aircraft was parked following a Tokyo-Boston flight.
atwonline.com
The Japan Transport Safety Board (JTSB) told reporters that the badly burned ANA 787 battery experienced an “uncontrollable high temperature” associated with thermal runaway, according to multiple reports from Tokyo. The US National Transportation Safety Board (NTSB) has said the Japan Airlines (JAL) 787 lithium ion battery that sparked a fire in Boston Jan. 7 similarly shows indications of thermal runaway.
The JTSB and NTSB both have been unable to determine a root cause of the lithium ion battery failures.
As part of the effort to determine what happened on the two aircraft and facilitate the process of lifting the worldwide Dreamliner grounding, Boeing is asking FAA for permission to operate 787 test flights. An application for 787 test flights is “under evaluation” by FAA, a Boeing spokesperson told ATW. The company is not commenting further on the proposed flight testing.
The ANA event—involving the main battery in the forward electronic equipment bay—occurred inflight and caused an unusual smell to permeate the aircraft, prompting an emergency landing. The JAL 787 event—involving the battery used to start the auxiliary power unit—led to an onboard fire while the aircraft was parked following a Tokyo-Boston flight.
atwonline.com
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