SESK: Stuff Everyone Should Know · sesk.info/pilot-runup-firm-surface
Why should a run-up be done on a firm surface free of debris?
The propeller can throw loose stones backward, damaging the prop and tail.
- The propeller can throw debris and damage the airplane ✔
- Grass makes the engine run hot
- The brakes only work on pavement
Why: At high rpm, the propeller can pick up pebbles, dirt or sand and hurl them backward. That nicks the prop and can damage the tail. Pick a smooth, paved or turf spot free of debris.
Huh, didn't know that: Small chips in a propeller's leading edge can grow into cracks if not fixed.
Why did the pilot avoid the gravel run-up? He did not want to start a rock band.
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References
Answer: The propeller can throw debris and damage the airplane. At high rpm, the propeller can pick up pebbles, dirt or sand and hurl them backward. That nicks the prop and can damage the tail. Pick a smooth, paved or turf spot free of debris.
- Airplane Flying Handbook FAA-H-8083-3C Chapter 2, Ground Operations www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/airplane_handbook/03_afh_ch2.pdf
the propeller may pick up pebbles, dirt, mud, sand, or other loose objects and hurl them backwards. This damages the propeller and may damage the tail of the airplane.
Checked 2026-10-09.
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