In March and April PSA picked up about 900 hrs of flying. Management should have seen that we were unable to staff the additional hrs of flying due to pilots being pulled off the line and into the training department to train the pilots we need for the 900s. In addition SAP is a great benefit, but the downfall for management is when pilots don't pick up the additional flying after they drop down to 65 hrs thus creating more open time. We are not having trouble filling classes and classes will continue, there just might be a few more instructors flying this month and next to cover the critical days that we are understaffed.