CHIRP continues to get reports such as this where turnrounds are required to run like clockwork to make the route work. On the face of it, the theoretical plan works but, in reality, the time taken requires the use of commander’s discretion. The CAA do monitor AT routes closely, and take a strong interest if, over a season, the actual operation of a scheduled route exceeds the maximum FTL for 33% of the times. If this happens, then the operator is required by the CAA to make changes to the route structure (ORO.FTL.110 (j) refers).