On a related note, the FAA has released an AD covering the AS350B3 post MOD 073254 (2B1) and the EC130B4 post MOD 073773. Effective November 18, 2010, AD 2010-21-07 requires a check of the forced idle micro-switches on the twist grip prior to conducting a practice autorotation or within 100 hours, and repetitively thereafter, every 600 hours. EASA issued a similar AD (2009-0256) on December 2, 2009.