The fact is, a failure of the belt that drives the hydraulic pump will result in the illumination of the hydraulic warning light and an immediate loss of hydraulic pressure. The accumulators are provided to allow for sufficient control of the aircraft to reduce airspeed to 65 KIAS. From this point forward control has to be maintained while overcoming between 15 and 26 lbs of lateral cyclic force. This is not trivial and is part of the justification for going to a duel hydraulic system in EC-130 and having the option for duel hydraulics in the AS-350 series.