Runaway Diesel - Engine Blown?

[IronRobi]

TLDR: Turbo leaking oil, motor runaway for around 5s, stalled when slamming brakes, no engine won't crank at all. Blown?

Last week the wife had a runaway situation on the highway. She was cruising around 120km/hr when all of a sudden it started accelerating on it's own. At around 150km/hr she slammed the brakes, the engine stalled, and she pulled off to the side of the road safely.

Towed it to the local euro indy shop, and the next morning they called to tell me they popped off the intake pipe and it was covered with oil, and they could see oil leaking from the turbo. They suspected the turbo let go but couldn't look at it until today.

They pushed it in today, and before starting the process of tearing down the turbos and putting in new ones they wanted to make sure it didn't take the motor out at the same time. They can't get the motor to crank at all. Even jumping the starter does nothing. They didn't have the specialized crank tool on hand to try turning it over at the crank and it'll take a few days to get it in.

I've seen runaways where the engine sits and revs for minutes. This whole scenario was done in a matter of seconds. My hope was when she slammed on the brakes the ASV did it's job and shut down the engine and I'd have my excuse to put in a set of hybrid turbos. But now, if the engine is shot with it, the cost to repair will outweigh the value of the vehicle.

I know nobody can say for certain without the vehicle in front of them, but wondering if anybody has any insight on other possible scenarios where the engine won't even attempt to turn over that could give me some hope?