The crash happend becuase at that stage before they carried load masters, basically it was 45 degrees C at 9000 ft and no wind .... just run out of power. I know this because I like many, flew with Jim "Turkey" Ayres who was PIC in the accident. He openly admitted the reason for the crash. Up drafts/down drafts no wind etc was normal.
This crash prompted the arrival of the 212's into Seis 4 as they supposedly had a better safety margin all round.
Loadmasters became the norm after this, so you fixed at night and flew as loadmaster during the day if you were an engineer.
I was with Nigel at Seis 4 but left before the Seis 7 contract began.
In the previous pictures you can see a Llama and a All III, these were Schreiner machines, brought in supposedly because the could put the wire carrying rigs into tighter spaces. That was fine at 7 in the morning but they could not lift them out in the heat of the afternoon when the 212 had to go in and use a longer strop to get them out. In the end the Schreiner machines became the transport for the German labo workers!!