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Welcome to the Simulation Customer Services Portal.

Welcome to the L3 Commercial Training Solutions Customer Services Portal.

Please be advised that the address to send your parts for repair has changed to:

HTN (please include your part return Horizon ticket number here)
L3 CTS c/o Allport Cargo Services (ACS)
Unit 3
The Faraday Centre
Faraday Road
RH10 9PX

Creating a New Horizon Account
To register to use Horizon please ask a collegue who is already registered, or your L3 support manager, to request an account for you. You will need to provide your name, job title or role, company name and location, and your business phone and email contact details. Your information will be held and processed in line with our Privacy policy.

We have Updated our Privacy Policy
As the EU General Data Protection Regulation (GDPR) comes into effect, we have updated our Privacy Policy. This policy explains how we use your information and why it is important. At L3 we have always taken the security of your data very seriously, and we want you to know that you can trust us to respect your privacy and keep your personal information safe. You can read the updated Privacy Policy, Horizon Terms of Use, and L3 Conditions of Sale.

Visit our Website at and our Support Portfolio at For your parts needs visit our Simulator Lifecycle Support (SLS) Web Store.