10261507 (reload cod
Motor case ruptured in threaded area of rear closure. Rear closure was expelled from the case and motor was released to travel upward through the rocket booster section and into the avionics bay.
Shortly after ignition, as the motor began to pressurize, the motor catoed. The case and propellant grains were expelled through the booster, blowing the payload/avionics section upward. The propellant grains were released from the case and continued to burn for a short period of time. I have photos, video and remaining propellant grains and delay grains.