FAA Grounds Boeing 787 in US

2 Responses

  1. Nalliah Thayabharan says:

    The Boeing 787 Dreamliners’ final assembly is in Everett, Washington, but much of the its individual components are manufactured by subcontractors in several countries like wings in Japan by Mitsubishi and carbon fiber airframes in Italy. The Boeing 787 Dreamliner is the first commercial airliner to deploy lithium ion batteries. The lithium ion batteries used in the 787 were not only chosen because they provide twice the capacity and half the weight of NiCad batteries, but also because of their ability to be charged back to full capacity faster than competing battery technologies.Japanese manufacturer GS Yuassa builds these lithium ion batteries.
    Boeing chose to use Lithium Cobalt Dioxide as the cathode in the lithium ion batteries on these planes.This cathode chemistry is far more energetic, but; therefore, far more potentially hazardous than the Lithium Iron Phosphate cathode chemistry that is employed in the Government Motors (GM) Volt. Boeing 787 Dreamliner design was finalized and accepted by the FAA before the Lithium Iron Phosphate chemistry became acceptable. It would seem to me that if Boeing replaced the Lithium Cobalt Dioxide cathode batteries with the Lithium Iron Phosphate cathode batteries, the chance of potential fires would be greatly reduced.
    Lithium ion battery technology has been problematic and caused fires and explosions in less critical applications such as the AT&T broadband cabinets (Canadian made Avestor battery fires) and laptop computers. Three cargo plane crashes have been attributed to lithium ion battery fires in the cargo compartment including a UPS new Boeing 747 in 2010 in Dubai . What concerns more is the Aluminum wiring.
    If Boeing cannot come up with a reliable fix then the Airbus A350 will pose a serious threat to the backlog of Boeing 787 orders since Airbus chose to retain the pneumatic system in A350 instead of electrical system.

  2. Chris Hansen says:

    Government Motors, heh. :)

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