ion battery Japan probe finds miswiring of Boeing 787 battery Japan probe finds miswiring of Boeing 787 battery Japan probe finds miswiring of Boeing 787 battery

TOKYO —
Japan's Ministry of Transport said on Wednesday that an investigation into the overheating of the lithium-ion battery of the air carrier Boeing 787 found that the battery was improperly wired.
The Transport Safety Board said in a report that the battery of the aircraft auxiliary power unit was not properly connected to the overheated main battery, although the protection valve would prevent damage to the power supply of the auxiliary unit.
The flashing of tail and wing lights after the aircraft landed and the fact that the main battery was turned off led investigators to conclude that the auxiliary power unit had an abnormal current due to mis-wiring.
More analysis is needed to determine what causes the main battery to overheat and emit smoke that caused January, the agency said.
The emergency landing of domestic flights and the global landing of Boeing 787.
They said they were consulting Boeing on the issue.
Due to the ANA incident, the Federal Aviation Administration and aviation authorities in other countries suspended 787 fleets after a battery fire broke out on a 787-foot plane parked in Boston earlier in January.
Boeing's 787 of what it calls Dreamliner is the first aircraft to widely use lighter-weight lithium-ion batteries, charging faster and more energy than conventional batteries of similar size.
However, the battery is also more prone to overheating. TOKYO —
Japan's Ministry of Transport said on Wednesday that an investigation into the overheating of the lithium-ion battery of the air carrier Boeing 787 found that the battery was improperly wired.
The Transport Safety Board said in a report that the battery of the aircraft auxiliary power unit was not properly connected to the overheated main battery, although the protection valve would prevent damage to the power supply of the auxiliary unit.
The flashing of tail and wing lights after the aircraft landed and the fact that the main battery was turned off led investigators to conclude that the auxiliary power unit had an abnormal current due to mis-wiring.
More analysis is needed to determine what causes the main battery to overheat and emit smoke that caused January, the agency said.
The emergency landing of domestic flights and the global landing of Boeing 787.
They said they were consulting Boeing on the issue.
Due to the ANA incident, the Federal Aviation Administration and aviation authorities in other countries suspended 787 fleets after a battery fire broke out on a 787-foot plane parked in Boston earlier in January.
Boeing's 787 of what it calls Dreamliner is the first aircraft to widely use lighter-weight lithium-ion batteries, charging faster and more energy than conventional batteries of similar size.
However, the battery is also more prone to overheating. TOKYO —
Japan's Ministry of Transport said on Wednesday that an investigation into the overheating of the lithium-ion battery of the air carrier Boeing 787 found that the battery was improperly wired.
The Transport Safety Board said in a report that the battery of the aircraft auxiliary power unit was not properly connected to the overheated main battery, although the protection valve would prevent damage to the power supply of the auxiliary unit.
The flashing of tail and wing lights after the aircraft landed and the fact that the main battery was turned off led investigators to conclude that the auxiliary power unit had an abnormal current due to mis-wiring.
More analysis is needed to determine what causes the main battery to overheat and emit smoke that caused January, the agency said.
The emergency landing of domestic flights and the global landing of Boeing 787.
They said they were consulting Boeing on the issue.
Due to the ANA incident, the Federal Aviation Administration and aviation authorities in other countries suspended 787 fleets after a battery fire broke out on a 787-foot plane parked in Boston earlier in January.
Boeing's 787 of what it calls Dreamliner is the first aircraft to widely use lighter-weight lithium-ion batteries, charging faster and more energy than conventional batteries of similar size.
However, the battery is also more prone to overheating.