Just read the new of hawaii as350 crash, high experience pilot, with Hydraulic Failure, apparently not being such a difficult procedure, results extrange to me, the sad final result.
Last week I was informed of the way an accident happened in France at SAF helicopters some time ago, with a helicopter property of Heliand.
High time instructor and a pilot training "Gov failure procedures" in a AS350B3.
At some point in flight, having normal rotorRPM variation due to flying in manual mode, helicopter started shaking violently and the controls were extremely difficult to move.(Just like with Hyd Failure but worse due to vibration).
Final result: crashed in a field, both survived.(helicopter completely destroyed)
Eurocopter explanation:Hydraulic system servos entered in resonance due to Hyd Fluid pressure variations caused by Rotor Rpm variations.
There is already an SB to solve it, that as far as i know is not aplied to new AS 350īs.
HOW MANY OF YOU KNOW OF SIMILAR HYDRAULIC SYSTEM FAILURES IN AS350B3??
AND WHAT EXPLANATION OF THE CAUSE WERE YOU GIVEN??
