Last-hour review
FAA Powerplant last-hour refresher
Follow the cycle—not a memorized symptom. FAA-S-ACS-1; FAA-H-8083-32B, 2023 edition. Selected last-hour study reminders, not complete exam coverage.
Free edition · 2 of 8 sections
Start with something useful.
Four strokes, two revolutions
The four-stroke sequence is intake, compression, power, exhaust. One complete cycle takes two crankshaft revolutions, not one.
Valve-event timing varies by engine. Timing is expressed in degrees of crankshaft travel; a stated opening event is not necessarily the fully open position.
Raise pressure before combustion
The turbine-engine compressor raises the pressure of inlet air and supplies air to the combustion section. Pressure increase and fuel burning occur in different sections.
Accessory arrangements differ across engines. Similar functions do not imply identical component names, construction, or service instructions.
Two free sections from edition v2026-09-05. Independent AI edition review: 2026-09-05. Review method and corrections.
Full edition · 8 sections
One last, focused look.
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- Eight compact sections on important, easily confused ideas.
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- Larger-text PNG for reading on your phone.
- Independent AI review—not described as human or expert review.
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Selected reminders, not a full syllabus, official exam aid, or professional advice. Check your exam version and permitted materials. Never take this sheet into an exam unless the provider expressly permits it.