On Friday, September 7, 2018 at 9:56:38 AM UTC-7, Brian wrote:
A Recording engine monitor might be best. As noted engine monitors do tend to increase the heads down time. And looking at the data after the flights might actually be much more useful.

They are quite good at identifying baffling that isn't installed or working right.

They are also very good at helping keep the engine cool, as most experts agree that keeping the CHT's under 400F will extend the life of the engine.

Brian

CHT is the critical measurement, with cooling rate a close second. It's good to give towpilots clear guidelines, and inform towpilots that engine monitor readings will be downloaded and checked, even if they are not....it will make them pay better attention to the engine parameters.