JUKI LK1900HS Broken machine

Question

We currently have a computerized JUKI bartack and we had a needle break and now the presser foot is stuck in the down position. We have looked in the manual and cannot find any topic that covers this problem and are sort of in a dire situation as we are with a parachute team at the United States Military Academy in West Point, NY and have equipment that needs repairs using a bartack.