Is that true even if the passengers don't pay more than their fair share of the operating costs?
One instance I can think of are the EAA "young eagle" flights where kids can come to the airport and get a flight with a pilot. Those are definitely advertised, but since they aren't done for profit, my impression was that they are clearly part 91. (I don't know if those flights are completely free, though.)
EDIT: nm, saw the post above about "common purpose" rule.
One instance I can think of are the EAA "young eagle" flights where kids can come to the airport and get a flight with a pilot. Those are definitely advertised, but since they aren't done for profit, my impression was that they are clearly part 91. (I don't know if those flights are completely free, though.)
EDIT: nm, saw the post above about "common purpose" rule.