Dougie,
any Maldrop whether on the course or not meant impounding the a/c and an investigation by JATE. If I recall correctly this particular one was the WRAF parachute packer who goofed. I have mentioned this in an earlier post (Doubling up on the mouth ties of the anti swing parachute.).
It was late when the JATE team turned up and as we were flying on my qualifications I had sent the student home and I dealt with JATE.
Their initial suspicion that we had not rigged it properly was dispersed in the cold light of day when they inspected the anti swing chute.