Hi SD666,
Quote:
What evidence is there of a power supply failure?
(I shall assume that is not a rhetorical question.) Definitely at the end of flight; otherwise it reqiures the roughly-simultaneous loss of all AC generation. Assuming the APU was not running, this would involve the loss of both engine-driven AC generators (one per engine). In each case, that could be caused by a failure of either the generator itself or the engine. As you could tell me: to prevent an ACARS message being sent for the first failure, the second failure has to be very soon after the first. By definition, therefore, there can be no ACARS evidence of such a failure sequence.
Thanks for your informative and well-argued posts.