Peter,
Spot on it was odd. We lived at RAF Seletar 1960-1963 and dad spent his whole time abseiling out of Wessex's to recover RAF aircrew where planes like the Hastings kept piling in, into remote jungle areas. Something to do with a major pin failure in the tail section well known about apparently. The same issue Peter, if you remember as the fatal crash near Abingdon I think it was called Little Bawden in 1965 killed 40 PARA's and RAF crew.
I went back in 1973 with 2 PARA on a Jungle Warfare course based at Pulada Malayan Army Barracks north of Jahore Bahru. We were issued live rounds as insurgents were pushing south at the time of our course, so we were really on live ops and not training. Really strange, and you know its going to be hairy when the Malays let you take the lead