inetdog
The battery bus might also be powered from the charger (BCU) if the battery goes open circuit, but apparently when the battery fails in a short circuit mode or high enough level fault alarms go off the battery bus cannot receive external power and so the APU cannot run.
So if in an emergency, the APU is powering the aircraft, and the APU BATT decides to short circuit, it takes the APU along with?
What?
Also...
The exemplar has (so far) only been subjected to non-invasive examination.
I suppose "Exemplar" could be defined in more than one way. I assume it is used as: Undamaged, unused, for comparison. The Main Battery in JAL is not strictly speaking an exemplar, it is involved in the circuitry intrinsically.
Definition of EXEMPLAR: one that serves as a model or example: as . a: an ideal model . b: a typical or standard specimen
It (JAL008 MAIN) really is not an 'exemplar'.
Right, picky.
