I read somewhere, Faceache perhaps, that the Sea Kings cabin roof panels were the problem, or part of it. My Sea King memory is 40 years ago but if I remember correctly they were rigid/ish and had some kind of padding behind, probably wrong though. My S61 time is more recent, ten years ago but 30 years on them. The cabin trim was totally differerent and made of different materials depending on the maker, I remember quilted trim that weighed next to nothing, except when oil soaked, to full Metair (blimey that name came from down deep) that was the dogs whatsits at the time. I recall that had some sort of rigid foam backing fronted by vinyl?? on metal frames. Whether asbestos was used anywhere in any of the 61s remains to be seen. I am sure Mr. Bristows top boys will be looking into it along with CHCs and all other 61 operators. Time will tell, probably too late for some people sadly.
3D