Excuse me for not being an engineer, but wasnt the subject about Jack Stall, not Retreating Blade Stall?? If I recall Jack Stall was something found in the AS350 after lots of cyclic movement and may commonly be known as a Hydraulic Hiccup or Cyclic Lock. Leave it alone for a few seconds untill hydrualics get back to normal??.
OK, now make me look stupid..........