---
title: "CS-E 830 Maximum Engine Over-speed — CS-E · Avioverse"
description: "If approval of a Maximum Engine Over-speed for inadvertent occurrences is sought for a rotating system of the Engine, a test must be undertaken on a…"
url: "https://avioverse.aero/regulations/easa/cs-e/subpart-e/cs-e-830-maximum-engine-over-speed"
---

# CS-E 830 Maximum Engine Over-speed

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

IR Implementing rule

## CS-E 830 Maximum Engine Over-speed

(a) If approval of a Maximum Engine Over-speed for inadvertent occurrences is sought for a rotating system of the Engine, a test must be undertaken on a complete Engine. Alternatively, test evidence from an Engine of similar design may be provided.

(b) The test conditions must be as follows:

(1) A total of 15 minutes run at the Maximum Engine Over-speed to be approved. This may be done in separate runs, each being of at least 2.5 minutes duration.

(2) A turbine-entry gas temperature equal to the maximum steady state temperature to be approved for use during periods longer than 20 seconds and not associated with 30-Second or 2-Minute OEI Power Ratings. However, for the shaft system to be approved, if the maximum over-speed cannot occur at the maximum turbine-entry temperature, the highest temperature which could occur at the conditions of Maximum Engine Over-speed must be used.

(3) The declared maximum operating oil temperature.

(c) On conclusion of such tests, the stripped condition of the Engine must be satisfactory for continued running. (See AMC E 830(c))

(d) The test may be run, if desired, as part of the endurance test of CS-E 740 provided the conditions of CS-E 830(b) are satisfied.

\[Amdt No: E/1]

IR — CS-E · ED Decision 2007/015/R · CS-E Easy Access Rules · EAR revision 7 Dec 2023

[All rules in SUBPART E – TURBINE ENGINES: TYPE SUBSTANTIATION](https://avioverse.aero/regulations/easa/cs-e/subpart-e)

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.