I'm glad I found this post - lots of good information on something I'm trying to figure out -
Part of my job is to travel around the state collecting water samples from city wells. This is always a 1-person job, and I usually drive, but I've brought up the possibility of renting a plane to make these trips, on the grounds that some of the sites are so far away that I could visit 2 or more sites in a single day rather than multiple days. I remember from PP training that as long as the flight as incidental, then being reimbursed for flying is alright, as I could just as easily drive, or take a motorcycle, or a boat - my agency has different reimbursement rates for those things. After some digging, I even found they have a reimbursement rate for personal aircraft (to the HR lady's surprise - apparently nobody's used it since she's been here). I've used that personal aircraft reimbursement rate as evidence that, at some point, people have used it before. My supervisor thinks it's a great idea, and I've been tasked with writing an actual agency policy specific regarding use of private aircraft for this kind of fielwork. Everything seemed fine - I'd be flying myself between sites, no passengers, and the airplane is just a mode of transportation.
The one issue that's come to mind (after reading through these posts) would be the water samples. I collect a few bottles of water at each site, and we test them back where I work. Would this then be in violation of Mangiamele's intepretation of 61.113(b)(2)? Are the water samples somehow "delivering freight", even though really I'm just delivering them back to my own agency?