Piston Engine Trend Monitoring Log
Piston Engine Trend Monitoring Log with structured readings per session — build the longitudinal trend record that single measurements can't provide.
The failure signatures are all RELATIVE — to the other cylinders and to last month — which makes the longitudinal log the diagnostic instrument.
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 piston engine trend monitoring log: structured per-session readings that build the trend record — because the failure signatures are all relative.
About Piston Engine Trend Monitoring Log
Engine-monitor data (CHT/EGT per cylinder, oil temp/pressure, fuel flow) carries early signatures: a cylinder's EGT drifting from its peers, CHTs climbing at constant OAT, oil pressure sagging at temperature. The corollary: the failure signatures are all RELATIVE — to the other cylinders and to last month — which makes the longitudinal log the diagnostic instrument. This log enforces the structure that makes trends readable — the same fields every session, dated, per aircraft — so the comparison that diagnosis depends on is a glance at the table instead of a dig through shop invoices and memory. Export the CSV before any maintenance conversation and your mechanic starts from data.
How to use Piston Engine Trend Monitoring 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 Piston Engine Trend Monitoring 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: the failure signatures are all relative
- ✓CSV export turns maintenance conversations into data reviews
Frequently asked questions
Which engine-monitor trends predict trouble?+
The classics: one cylinder's EGT rising relative to its peers (injector clogging or induction leak), a slow CHT climb at constant conditions (baffling deterioration or timing drift), widening EGT spread (fuel distribution), and oil pressure decaying at stable temperature (bearing wear or relief-valve issues). Each is invisible in a single flight and obvious across ten logged ones — the entire argument for this kind of record.
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.
Is this tool private — who can see my entries?+
Only you. Entries live in your browser's local storage and never leave your device, so there is no account, no cloud sync and no one else with access. Because the data is device-local, export a CSV backup before clearing browser data or switching computers.
What format does the export use and what reads it?+
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 engine condition record is never trapped here.
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