Alan Memley

I operate Eclipse N778TC, and over the past three years have accumulated over 800 flight hours on the aircraft, all on our Part 135 charter flying. We have a procedure that has prevented engine surges from occurring: WE DO NOT SELECT ANY TEMPERATURE HIGHER THAN 68 DEGREES ON THE ENVIRONMENTAL SYNOPTIC. This procedure keeps the cabin bleed valves from the engines in the LOW position. More airflow is left for combustion. NO engine surges. Restricting the altitude for the Eclipse to 30,000 feet will have an unintended consequence: more time flying IN clouds, especially in the summer. This increases the chances of inadvertent encounters with convective weather, creating a much greater hazard to flight operations. In summertime, 35-37,000 feet is needed to overfly most of the weather. I recommend that the FAA re-word the AD as follows: "When operating from 30,000 - 37,000 feet altitude, the cabin temperature selector will not be adjusted any higher than 68 degrees F." This solution will continue to allow flight above most weather, increasing safety, while still addressing the issue of engine surging.