Auxiliary power unit

An Update On Yesterday’s 787 Fire

A number of media outlets are reporting that yesterday’s fire on a parked (and empty) JAL 787 at Boston Logan Airport point to a battery that is used to start-up the APU, or auxiliary power unit. If this is true, it’s an important distinction.  While a battery fire could happen at anytime, the auxiliary power unit is built to power the plane when it’s parked and the engines are off, not when the plane is flying, making it unlikely to cause a problem in-flight.  Not impossible, but less likely. I […]