Hi Old-Duffer,
I was a QFI on RFS (Refresher Flying Sqn) at Leeming from '77 to '79 and remember 2 Ecuadorian Officers who came through us prior to the Jag OCU at Lossie. The timeframe sounds about right. One (my stude) was named Lieutenant Aguirre and the other, IIRC, was named Captain Moscoso. They were both fine ambassadors for their country, as well as being good eggs. They surprised us by saying that their air force planned to operate their Jags from Guayaquil airfield, which is some 10000ft AMSL - would have been interesting, to say the least! Sad to hear of this accident, but hopefully my info will go a little way to clearing things up.