On Jan 17, 7:11*am, Andy wrote:
Yes A320 has a RAT and it automatically deploys on loss of AC bus 1
and 2 which would happen if both engines lost power (and the APU was
not running). *

Preliminary reports indicate the APU was running. The APU
manufacturer has even received a thank you message from one
passenger. I cannot see a deployed RAT in any of the salvage photos.
So either engines at or above idle, or the APU, would have been able
to provide normal electrical and hydraulic services.

Andy