AOTW,
Since I can only find the reference by omission, I called Nelson H (Bell Customer Support Rep) this morning who agrees, and confirmed what I thought: but agrees that it is only referred to in the FM by what is not said, rather than what is said! There is a reference to the flight controls being locked prior to shut down, and an allowance for the cyclic to be used to minimise static stop contact, but not to allow collective movement.
He is asking Bell for a firm reference, and I will post the reply when it arrives.