Ground Instruction Log

When it supports an endorsement, yes in practice: knowledge-test endorsements (61.35), flight-review ground portions (61.56 requires a minimum hour of ground), and aeronautical-knowledge training for certificates all assume a documented record of what was taught. A subject-tagged ground log protects the instructor — if a student's knowledge-test endorsement is ever questioned, the session trail is the defence.

61.189(c) requires instructors to keep a record of endorsements for knowledge and practical tests, and solo endorsements, for at least 3 years — including the kind of test or check and the result. Many instructors keep them for their entire career because renewal-by-activity, Gold Seal applications and employment verification can reach back further than the regulatory minimum.

No — Part 141 schools and most 61 academies maintain their own official training records, and those remain the documents of record. This is the instructor's personal layer: your portable evidence of activity that survives job changes, school closures and software migrations, in a plain CSV you control. The two should agree; yours is the one you can produce in five seconds.

No account and no connection are needed once the page has loaded — all records are kept in local storage on your device and all calculations run in your browser. The trade-off is that data does not sync between devices, so export the CSV file when you want to move or archive your records.

Use the Export CSV button below the table: it downloads your full instruction record as a spreadsheet-ready file. From there you can print a clean copy, archive it with your training folder, or import it into any electronic logbook program. Exporting monthly is a good habit since the working data lives only in your browser.