---
title: "CS-E 290 Hand Turning — CS-E · Avioverse"
description: "It must be possible to rotate the crankshaft in controlled slow motion."
url: "https://avioverse.aero/regulations/easa/cs-e/subpart-b/cs-e-290-hand-turning"
---

# CS-E 290 Hand Turning

Engines (CS-E) · CS-E · EAR revision 7 Dec 2023

IR Implementing rule

## CS-E 290 Hand Turning

It must be possible to rotate the crankshaft in controlled slow motion. Where this is effected by hand-turning gear as distinct from the Propeller, a means of safe guarding the operator against injury, if the Engine starts or kicks back, must be provided. It must not be possible to damage the Engine by use of the hand-turning gear.

IR — CS-E · ED Decision 2003/9/RM · CS-E Easy Access Rules · EAR revision 7 Dec 2023

[All rules in SUBPART B — PISTON ENGINES: DESIGN AND CONSTRUCTION](https://avioverse.aero/regulations/easa/cs-e/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 7 Dec 2023, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.