Fuel System Inspection Log
Fuel System Inspection Log with structured readings per session — build the longitudinal trend record that single measurements can't provide.
Cap seals are the silent culprit: hardened O-rings let rain through, and the water shows up at rotation, not at the sump check after a dry week.
No entries yet — add your first one above. Data stays in your browser.
⚠️ Not for operational decisions. This is a record-keeping and planning aid only — not certified avionics, not a source of regulatory truth. Always verify against official sources (FAA) and your operator's approved documents before flying.
Free fuel system inspection log: structured per-session readings that build the trend record — because cap seals are the silent culprit.
About Fuel System Inspection Log
Engine condition is a story told in series, never in snapshots: fuel contamination remains a leading cause of engine stoppage; the defences are mundane — sump samples, strainer inspection, cap-seal condition, vent checks — and effective exactly in proportion to their regularity. Put concretely — cap seals are the silent culprit: hardened o-rings let rain through, and the water shows up at rotation, not at the sump check after a dry week. Each entry here captures the same structured readings, building the longitudinal record automatically. Twelve months of entries costs an hour of logging and buys the early-warning system that catches problems while they're cheap.
How to use Fuel System Inspection Log
- 1Log the structured readings after each flight, sample or service event.
- 2Scan the table for drift against your own baseline before reacting to single values.
- 3Export the trend record for your mechanic, engine shop or analysis lab.
Why use Fuel System Inspection Log?
- ✓Identical structured fields every session — trends stay comparable
- ✓Per-aircraft/engine separation for multi-aircraft owners
- ✓12-month activity tile shows whether the record is staying alive
- ✓Captures the signal that matters: cap seals are the silent culprit
- ✓CSV export turns maintenance conversations into data reviews
Frequently asked questions
What does a meaningful fuel-system record capture?+
Recurring observations, not just annual sign-offs: what came out of the sumps and strainer (water? rust? rubber?), tank and cap-seal condition, vent patency, selector detent feel. A pattern of 'water after rain at the left cap' across three entries is an O-ring diagnosis nobody makes from memory. This log's structured items exist to make those patterns visible — they're cheap entries against an engine-stoppage class of risk.
How often should these readings be logged to be useful?+
Often enough that the series outweighs the noise: every oil change for analysis-type records, every flight or weekly for monitor-derived numbers, every annual for inspection-type checks. The honest rule is consistency over frequency — six identical-format entries a year beat sporadic bursts, because trend reading depends on comparable conditions and unbroken sequence more than on raw volume.
Do I need an account or internet connection?+
No account and no connection are needed once the page has loaded — records live in local storage on your device and every calculation runs in your browser. Data doesn't sync between devices, so export the CSV when you want to move or archive your records.
Can I get my data out if I switch systems later?+
Always — the CSV export is a complete, lossless dump of your engine condition record, generated locally in one click. Import it into commercial software, archive it with your files, or post-process it in a spreadsheet. No lock-in is deliberate: data you can't take with you isn't really yours.
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