---
title: "AMC E 790 Rain and Hail Ingestion — CS-E · Avioverse"
description: "For the purposes of interpreting the words ‘unacceptable mechanical damage’ and ‘unacceptable power or thrust loss' in CS-E 790(a)(1), (a)(2), (b) and…"
url: "https://avioverse.aero/regulations/easa/cs-e/subpart-e/amc-e-790-rain-and-hail-ingestion"
---

# AMC E 790 Rain and Hail Ingestion

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

AMC Acceptable means of compliance

## AMC E 790 Rain and Hail Ingestion

(1) For the purposes of interpreting the words ‘unacceptable mechanical damage’ and ‘unacceptable power or thrust loss' in CS-E 790(a)(1), (a)(2), (b) and (c), see paragraphs (5)(c)(vi), (5)(c)(vi)(A) and (B) in AMC E 790(a)(2).

(2) For the purposes of interpreting the words ‘flameout, rundown, continued or non-recoverable surge or stall’ in CS-E 790(a)(2) and (b), see paragraphs (1) and (5)(c)(vi) in AMC E 790(a)(2).

(3) For the purposes of interpreting the words ‘sudden encounter’ in CS-E 790(a)(2) and the words ‘suddenly commencing’ in CS-E 790(b), see paragraphs (5)(c)(iv)(D) and (G) in AMC E 790(a)(2).

(4) For the purposes of interpreting the words ‘rapid acceleration’ and ‘rapid deceleration’ in CS-E 790(b)(2) and (b)(4) should be interpreted as meaning a throttle movement in not more than one second.

(5) If the Engine is certified under the assumption that the protection device considered under CS-E 790(d) is provided by the aircraft installation and if the compliance with CS-E 790(a) to (c) is waived, then the Engine approval would be endorsed accordingly and the Engine instructions for installation would need to impose the conditions of CS-E 790(d)(1) to (3) to the installation.

\[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 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.