---
title: "CS-E 860 Turbine Rotor Over-temperature — CS-E · Avioverse"
description: "The most critical temperature conditions which the turbine rotor(s) can attain in the event of Failures of the cooling air supply must be established by…"
url: "https://avioverse.aero/regulations/easa/cs-e/subpart-e/cs-e-860-turbine-rotor-over-temperature"
---

# CS-E 860 Turbine Rotor Over-temperature

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

IR Implementing rule

## CS-E 860 Turbine Rotor Over-temperature

(a) The most critical temperature conditions which the turbine rotor(s) can attain in the event of Failures of the cooling air supply must be established by analysis and tests, as appropriate. Failure of individual components of the Engine that can be classified as Extremely Remote need not be included in the analysis or tests.

(b) Evidence to demonstrate that instrumentation is not required under CS-E 60(e) may be obtained from endurance running in an Engine or on rigs, or, where adequate margins can be demonstrated, by calculation. Where practicable, the duration of endurance running may be reduced by compensating increases in the test temperature.

IR — CS-E · ED Decision 2003/9/RM · 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.