What documents are needed to conduct Part 135 training? Posted on 6.20.246.28.24 by sjoyce Please provide these documents at least 2 weeks prior to training: • A031 showing the center you’re training at and the simulators approved for training • Approval letter from FAA confirming the training programs are approved • General Training Manual (GTM) • Aircraft Specific Training Manual (ASTM) • Check Airman letters signed by POI for each center and aircraft • Training Summary Checklist (TSC) • Contract Differences Training (CDT)