Incorrect Processing of the Integrity Information Message by Collins Aerospace Satellite Based Augmentation Systems Receivers
- Published
- Replaces
- 2024-03
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Design approval holders using the affected Collins Aerospace SBAS receivers should assess the operational safety impact of the incorrect processing of Message Type 6 and consider any cascading effects on other systems. They should determine if operational mitigations or limitations are necessary and communicate these to operators. Preparations for future design changes to address the issue should be made if a solution becomes available. No specific compliance deadlines are stated in the bulletin.
Summary
EASA Safety Information Bulletin 2024-03R1 addresses an issue with Collins Aerospace Satellite Based Augmentation Systems receivers models GPS-4000S, GLU-2100, GLUS-2100, and GLUS-2100A. The bulletin highlights incorrect processing of the integrity information message (Message Type 6) under certain conditions, potentially affecting the notification of compromised GNSS position integrity. This issue was exposed following an update to the EGNOS ground system in November 2023 and applies to specific hardware and software part numbers listed in the bulletin.
What changed
EASA SIB 2024-03R1 revises the original SIB 2024-03 issued on 06 February 2024 to raise awareness about the potential relevance of the integrity message processing issue and to include recommendations for other SBAS systems with similar Message Type 6 transmission characteristics. It does not introduce mandatory actions but informs stakeholders of ongoing investigations and possible future measures.
Why it matters
This bulletin is important for aviation professionals because the affected SBAS receivers may fail to alert flight crews when the GNSS position integrity is compromised, potentially impacting navigation safety. Operators and maintenance organizations need to understand the implications for aircraft equipped with these receivers, especially when operating under EGNOS or similar SBAS coverage. Awareness and assessment of this issue help ensure continued operational safety and regulatory compliance.
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