Hello Sharpend,
Unless there was a similar event at Brawdy, It was your drouge pack at the SAAFA Airday at Aberporth in 84 or 85.
Either way the damage to the pack was incredible it was stoved in so badly there were tears in the aluminium. Even a lay man could see there was no way it would have worked after that.
So just as well you brought her down safely!