---
title: "NCO.OP.170 Ice and other contaminants – flight procedures — Part-NCO · Avioverse"
description: "The pilot-in-command shall only commence a flight or intentionally fly into expected or actual icing conditions if the aircraft is certified and equipped…"
url: "https://avioverse.aero/regulations/easa/air-ops/part-nco/subpart-b/nco-op-170"
---

# NCO.OP.170 Ice and other contaminants – flight procedures

ANNEX VII (Part-NCO) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

IR Implementing rule

## NCO.OP.170 Ice and other contaminants – flight procedures

(a) The pilot-in-command shall only commence a flight or intentionally fly into expected or actual icing conditions if the [aircraft](https://avioverse.aero/glossary/easa/aircraft) is certified and equipped to cope with such conditions as referred to in 2.a.5 of Annex IV to Regulation (EC) No 216/2008.

(b) If icing exceeds the intensity of icing for which the aircraft is certified or if an aircraft not certified for flight in known icing conditions encounters icing, the pilot-in-command shall exit the icing conditions without delay, by a change of level and/or route, and if necessary by declaring an emergency to ATC.

IR · NCO.OP.170 — Regulation (EU) No 965/2012 · Regulation (EU) No 800/2013 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

GM Guidance material

## GM1 NCO.OP.170(b) Ice and other contaminants – flight procedures

KNOWN ICING CONDITIONS

Known icing conditions are conditions where actual ice is observed visually to be on the [aircraft](https://avioverse.aero/glossary/easa/aircraft) by the pilot or identified by on-board sensors.

GM · GM1 NCO.OP.170(b) — Regulation (EU) No 965/2012 · ED Decision 2014/016/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in SUBPART B: OPERATIONAL PROCEDURES](https://avioverse.aero/regulations/easa/air-ops/part-nco/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, 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.