Thank you megan, actually I did read that thread earlier but it did not enlighten any more than the apparent stall.
What led to the stall and what were the findings of the (inevitable) investigation are the questions puzzling me (as were apparently the core of the debate years ago).
Edit: to give reasoning for my query to those that have not read or have forgotten what was discussed in this topic in 2006, there was a lot of debate on this thread of the accident, but many stated that they will not open the case any further until 30 years have passed since the accident. It's been 43 years now, and I am kindly asking if more details may be told now.