Ultralight Maintenance Log (Part 103)

Part 103 vehicles fly outside the certification system: no annual, no AD list, no required records — so the conscientious owner's log IS the airworthiness program, typically built around the manufacturer's schedule and two-stroke engine realities. The tracking implication: no certification means no mandated maintenance — which makes the self-imposed record the entire airworthiness system for a Part 103 vehicle. A record structured around those realities — cycles beside hours, the operation's specific recurring items, per-aircraft history — predicts failures and budgets honestly where a generic date/work diary just accumulates lines.

Make entry friction near-zero (this log's seven fields take thirty seconds), assign the habit to a role rather than a person ('whoever closes the cowl logs the work'), and review the board on a fixed rhythm — weekly in season. Shared operations decay by skipped entries, not wrong ones; the visible next-due badges and entry counts here make skips conspicuous, which is most of the cure.

Clearing site data deletes locally stored entries — that's the price of a genuinely private, server-free design. Protect yourself with the one-click CSV download before any cleanup, OS reinstall or device change: re-importing history later beats reconstructing it from memory.

A plain CSV with one row per entry and labelled column headers — the most portable format there is. Spreadsheets open it directly, most specialised software can map it on import, and a printed copy is perfectly legible to a human reviewer. Nothing proprietary means your fleet maintenance history is never trapped here.