---
title: "AMC E 320 Performance Correction — CS-E · Avioverse"
description: "An acceptable method for calculating performance corrections is defined in ISO 1585:2020, Road vehicles - Engine test code - Net power."
url: "https://avioverse.aero/regulations/easa/cs-e/subpart-c/amc-e-320-performance-correction"
---

# AMC E 320 Performance Correction

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

AMC Acceptable means of compliance

## AMC E 320 Performance Correction

(1) An acceptable method for calculating performance corrections is defined in ISO 1585:2020, Road vehicles - Engine test code - Net power.

(2) Since the effect of free water on power output is within ±1% over the range of water/air ratios normally encountered in operation, and the amount of free water is exceedingly difficult to measure, no corrections for free water need to be made.

\[Amdt. No.: E/1]

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

[All rules in SUBPART C — PISTON ENGINES, TYPE SUBSTANTIATION](https://avioverse.aero/regulations/easa/cs-e/subpart-c)

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.