Hi HazelNuts39,
The language is not specific, though I anticipate changes in the text.
"....must incorporate a monitoring and warning feature....etc."
The operant is "for dispatch". Since charging is not prohibited, specifically, it leaves rhe option open. BUT, any use of the battery would drop the voltage below minimum (possibly) and instantly violate the condition.
However, "for dispatch" is a threshold.
The meaning of "backup" stands alone, it must take precedence over any function that is not part of the definition. So launching, having met the threshold, implies that the voltage should be available throughout the flight, barring malfunction.
FAA regs are minimums, so I fall back on TURIN......"The Main Bat is only connected to a live bus when no other electric source is available and Bat Switch 'on'. Therefore it is not discharging unless there is a power failure."
A guess would be that ANA charged the batteries to legal, isolated (sel off), and took off. The runaway having begun prior to T/O, the charger would not be in use, but the die was cast....why would one charge after T/O? If the voltage drops below minimum, I suppose the battery could be charged, but still isolated from live bus.......that may change.
The solution is in the interface between FAA and Boeing, each working at cross purpose, but theoretically in concert. Cross purpose is not defeating, it is entirely logical, they have a different mission. FAA has to walk the tighter line, imo; they want Boeing to succeed, (promote aerospace business), while ensuring high standards of safety.
Each of them work to the edge of the mission, and the result is safe prosperous travel....
Last edited by Lyman; 28th January 2013 at 22:46.