Engine & maintenance

Your engine. Every trend.

Oil analysis, compression, engine monitor data, inspections and your own reminders, on one engine graph and one list of what's due.

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Engine · N4521R2026-10-03Block / air 1.02 / 0.85 hFuel 8.1 galMax CHT 403°FAlerts 0 warnings · 1 cautionsSample flight

Loading the flight…

Drag across a chart to zoom; double-click to reset; Ctrl/⌘ + wheel zooms. Keys: ← → pan, + − zoom, 0 reset, 1–4 cylinders, n / p next / previous alert.

Engine trends · N4521RSample data
Iron Copper Aluminum
  • Oil changeIn 12.4 h
  • AnnualMar 31, 2027

Illustrative sample data

Every trend, over the engine's life.

Oil analysis, compression and oil use on one graph, by date or by engine hours. A sample pilot's N4521R.

Plot against
Oil analysis wear metals
Compression
More
Oil analysis wear metals (ppm) Iron Copper Aluminum Lead (from avgas), right axis
Show the numbers
DateIronCopperAluminumLead (from avgas)
Apr 3, 202514.74.65.13,907
Jul 30, 202515.54.553,429
Oct 30, 202515.75.56.93,348
Apr 25, 202615.94.56.43,639
Sep 6, 202618.75.25.93,854

Watch the engine. Stay ahead of what's due.

The numbers your mechanic asks about, kept and compared for you.

Oil analysis, read from the lab's report.

Upload the lab's PDF or a photo. Every sample is read with AI, each metal compared with the sample before, and you check the figures before they're added.

Iron, copper, aluminum, chromium, nickel, silicon and lead.

Upload the report or a photo. Review the readings before saving.

SampleIronCopperAlum.Lead
Mar 211343,100
Jun 913 (+2)343,250
Aug 2016 (+3)4 (+1)5 (+1)3,300
A sample oil analysis report

Compression, cylinder by cylinder.

Each cylinder's reading and the number it's out of, compared with the last check. Add as many cylinders as the engine has.

Twins: left and right engines logged together, compared separately.

Compare each reading with its last check.

EngineCyl 1Cyl 2Cyl 3Cyl 4
Left76/8075/8072/80 (−4)77/80
Right74/7976/7975/7973/79 (−1)
  • Cyl 176/80
  • Cyl 275/80
  • Cyl 372/80
  • Cyl 477/80

Engine monitor files, graphed.

Each flight's engine file adds its oil temperature, oil pressure and fuel used to the engine graph, by date or by engine hours. CHT and EGT per cylinder, RPM and fuel flow are graphed over the flight, on its page.

Files with unfamiliar column names are read with AI.

Oil temperature, pressure and fuel used, flight by flight.

185 °FCruise oil temp
62 psiOil pressure
9.4 galFuel used
Hours per quart of oil11.8 h
  • Cruise oil temp185 °F
  • Oil pressure62 psi
  • Hours per quart11.8 h

Inspections and reminders on time.

Annual, ELT, transponder, pitot-static and VOR checks with the date each comes due, your own reminders by months or hours, and when the engine reaches TBO.

Track due dates and your own reminders.

  • Oil change (every 50 h)Due soonin 12.4 h
  • VOR checkDue soonOct 30, 2026
  • Annual inspectionCurrentMar 31, 2027
  • Transponder · pitot-staticCurrentJun 30, 2027
  • Oil changeIn 12.4 h
  • VOR checkOct 30, 2026
  • AnnualMar 31, 2027

From records to a useful history.

  1. 1Add recordsUpload reports, readings and files.
  2. 2Review detailsCheck values before saving.
  3. 3Follow trendsBy date or engine hours.

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Stay ahead of your engine.

Every check and every trend, in one place your mechanic can read.

Start free See a sample pilot

30-day free trial, then $9.99 a month. Card required. Cancel anytime.