It was by the way a complete hydraulics failure ( as seen by the big puddle under the a/c) when on stand. Nothin the crew could do at this point.
Does the ATR have no backup for that? Every Cessna I flew has a nitrogen bottle and an emer brake lever that acts as a backup for hydraulic wheel brake failure....
Genuine question - probably the time to react to the hydr failure would have been to short anyhow even if a backup is fitted.