SNS3
Must be that calibrated wrist of yours that can sense 55 differential psi.
You misunderstand, I was talking about when one carries out a differential compression test using the correct tooling - but you knew that did you not?
This isn't really relevant to preflighting a powerplant, per the original poster's request. Perhaps you might stay on track.
QJB
From an old hand, keep up your current practices, your engineer will appreciate that you are interested in your machinery. If you are working your way up the food chain, you will at times find yourself working alone and away from resources.You will need to make decisions based on your own understanding of the machines you are flying
Cheers
Blackhand