---
title: "ATS.TR.420 Information to the operator — SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES, ATM/ANS · Avioverse"
description: "When an area control centre or a flight information centre decides that an aircraft is in the uncertainty or the alert phase, it shall, when practicable…"
url: "https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b/ats-tr-420"
---

# ATS.TR.420 Information to the operator

SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

IR Implementing rule

## ATS.TR.420 Information to the operator

(a) When an area control centre or a flight information centre decides that an aircraft is in the uncertainty or the alert phase, it shall, when practicable, advise the aircraft operator prior to notifying the rescue coordination centre.

(b) Whenever practicable, an area control centre or flight information centre shall, without delay, communicate all information notified to the rescue coordination centre to the aircraft operator.

IR · ATS.TR.420 — Regulation (EU) 2017/373 · Commission Implementing Regulation (EU) 2020/469 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

[All rules in SUBPART B — TECHNICAL REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES (ATS.TR)](https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, 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.