In section 61.51, the FAR requires So do any of you sport pilots carry something other than your logbook? Any idea what the FAA would deem acceptable as "other evidence?" This is one of those questions that probably shouldn't be asked of the FAA, lest we not like the answer. I'd prefer not to carry my actual logbook on flights, lest I screw up and leave it in some rental aircraft or spill my beer onto it during a rough landing. I'm thinking that a photocopy of the logbook endorsements would suffice. Thoughts? Anyone know if the issue has ever come up?