Wonder if it was fuel related?
This accident reminds me of one UAL (Convair) had in the early sixties.
In that incident, the Captain had been trying to transfer fuel from one tank to another, in complete contravention of instructions in the AFM.
Both engines quit due to fuel starvation, and the aircraft was deadsticked into a carrot patch just north of the SanFernando valley in California, with little damage.
Flown out four days later by a UAL management crew.
The report should be interesting reading.
The 580 is normally a very reliable machine.