Cessna Citation XLS+ — Airworthiness Directives

This Special Airworthiness Information Bulletin (SAIB) addresses an airworthiness concern related to the Honeywell GPS sensor used in various navigation systems. It highlights a potential issue where a missed Global Positioning System (GPS) Non-Precision Approach (NPA) may occur during flights exceeding five hours if no backup navigation system is available. The bulletin is not a mandatory directive but provides recommendations for pilots to ensure they are prepared for alternative navigation methods should the situation arise. The document revises a previous SAIB by updating the models and part numbers affected by this issue, primarily focusing on the Honeywell GPS sensors used in the Cessna Citation XLS and other aircraft.

• Pilots should be aware of the potential for GPS navigation loss during flights over five hours without backup systems.
• The issue is linked to Honeywell GPS sensors, specifically the VIDL-G Navigation Receiver.
• The FAA does not consider this issue an unsafe condition warranting mandatory action.
• Pilots are advised to prepare for alternative navigation methods if GPS issues occur.
• Affected Honeywell models include GNS-XES, GNS-XLS, KLN-900, and others.