here's a scenario, go up for a x-country flight and start getting engine roughness (very light, just something the student and I had not experienced before) about 10 miles after takeoff. just so happens that we were directly over an airport @ 6000 with plenty of landing options, so I wasn't terribly worried. Trouble shooted and couldn't get the engine to smooth out to how it was before. To me it was more of a nuisance than anything else but the student made a prudent decision to discontinue the flight and return to base and I commended him on his decision. Wrote in his logbook, X-C planing, diversions, and .8 hrs of time. Should the school eat the bill for the flight or the student pay for the time? I'm going to bill it regardless. Don't know what the problem was or whether mx was able to reproduce the problem on the ground.
The student can argue that he will have to redo the trip and that the .8 was not necessary, the school can argue that it was beneficial to the student's experience and will count toward his TT anyhow... Just curious what you guys think.