Fire and rescue workers who responded to a Boeing 787 lithium-ion battery fire at Logan Airport last week reported that it was difficult to access the battery for removal during extinguishing efforts, the NTSB said Monday, in an update on its investigation. All the workers who responded to the incident had previously received aircraft familiarization training on the 787. The board said investigators have examined the battery using radiographic and tomography scans to document its internal condition, and will disassemble it this week. The NTSB also has downloaded all the data from the airplane's flight data and cockpit voice recorders for analysis.
In addition, investigators took possession of burned wire bundles, the APU battery charger, and several memory modules. The maintenance and APU controller memory modules will be downloaded to obtain any available data. Investigators also documented the entire aft electronics bay, including the APU battery and the nearby affected structure where components and wire bundles were located. The Japan Airlines 787 had been in service for less than a month when the fire occurred. All passengers had disembarked before the fire was detected.