At this point it is difficult to determine exactly what caused this mishap. D-49 provides a very compelling scenario for a late-night flight with some element of get home itis. Without speculation, does anyone know if this specific AS-350B2 was equipped with a dual hydraulic system. If not so equipped, it could be argued that an instantaneous hydraulic fail could have compromised the control of the aircraft at such an altitude that control was not regained prior to impact with the terrain. Thus, it would not have been a CFIT situation but rather a compromised control issue.