It was a while ago and the memory is not what it used to be. It was I believe a mooney and was a UK accident. There was a problem with the trim running away and sticking and a contributary factor was that the new ANR headsets helped to mask the stall warning.
Maybe someone on here remembers exactly when it was? I will have a look around in the meantime, but as said the memory is not what it was.
Banjo