The reported fault on the KC-46 may affect the aircraft operation, but am not aware that BAC is the OEM of the locks etc, I would have expected those to be mission equipment provided by OEM's such as Ancra etc.
Post Max, there seems to be no reticence in blaming BAC for issues that arise in the operation of their products. Would we blame them if the coffee cup doesn't say "HOT LIQUID", as coffee is an item that surely deserves it's own ATA in the MEL,
Or not... No coffee, no go...