It was a major contribution to the fatalities after the Belgian AF crashed at Eindhoven. When I did the HEART job we visited Abbey Wood to ask a few questions ref the' J' which was still waiting to be introduced into service. They knew nothing of the insulation blanket problems nor of any of the other materials in the cargo compartment. They were also ignorant, among many other things of the noise problems on the 'J' which we had heard on the grapevine were much worse then the 'K' !