Today 2019-11-03, I had my 1st cutaway at jump 93. I was doing belly in a 6 way. Separated at 5500ft, tracked and then deployed.
My main started spinning right after opening. The spinning was violent as you can see in the video. I did not have time to pull toggles and I cut away around 2700ft.
After the jump, The rigger at my DZ and I found the main parachute and confirmed that toggles are perfectly set at that time. We checked the main and there are no tension knots at all. So toggle fire and tension knots should not be the reason for spinning. It makes me really uncomfortable about jumping in the future because I do not know if the mysterious spinning will happen again. I would like to ask other skydivers for ideas about the spinning. Many thanks.
Main: Pilot 168 ZP
DOM: 2018-Oct, 50 jumps on it.
Wingload ratio = 1.15
cutaway_jump93_191103.mp4