A spokesman for All Nippon Airways Co. (ANA) said records show three damaged circuit boards on its fleet of Boeing 787 “Dreamliner” aircraft had to be replaced last year. It is unclear if the damaged circuit boards are related to a battery fire on one of the fleet’s 787 aircraft in January, which resulted in an emergency landing in Japan and eventual grounding of all Boeing 787 planes worldwide.
In addition to the ANA incident, a Japan Airlines Dreamliner was grounded in Boston in January because of a battery fire. The Dreamliner aircraft uses a new lithium-ion battery as part of a design intended to make the aircraft lighter and more fuel efficient.
ANA spokeswoman Megumi Tezuka told Bloomberg News the airline fixed three circuit boards prior to flights last year. Tezuka said one of the boards, replaced April 7, 2012, was seriously damaged and caused damage to the area around the circuit board. All of the circuit boards were burned.
Boeing has submitted a plan to the Federal Aviation Administration (FAA) that would implement changes to the lithium-ion battery system. The new system would require extensive testing to ensure the batteries are safe before the 787 Dreamliners could be returned to service.
This is the first time in 34 years an entire model of airplane has been grounded.