They (training center) are two sims down (A300 and B757) and backed up in training. One of the Feb classes was sent home for a week due to bottleneck. And one of the March classes is, or will be sent home for 3 weeks due to the back up. Training center is full tilt....with sims down, they can’t keep up. Sims are down due to switching them over to the new avionics. The last 757 sim hasn’t even began the switch yet. All new hires are LDS (new avionics) trained only.