Re: Descending at vmo
You have exceeded an Aircraft Limit. Techniquilly speaking, you are supposed to write the aircraft up - unless you can find somewhere in the Regs an allowance in time or margin of exceedance - and I don't think you're going to find that. I'm not trying to be a stickler and I'll say that I've heard that noise lots of times and not written it up. It's just that if you have an Inspector on board and he hears it all the way down with no concern or action by the crew - you might be hearing from him.
This was dixcussed in a thread about flying in the vicinity of high moutain waves in larger jets with lots of inertia. It's possible to get the horn for a a relatively long period of time if - even when the throttles go to idle - if you fly into one.
LL