EASA SIB BEA-2024-05
Indicating/Recording Systems: Load 7.5 version for PRIMUS EPIC field-loadable software system
Summary
BEA 2024-05 is a Special Airworthiness Bulletin addressing the PRIMUS EPIC field-loadable software system Load 7.5 version for EMBRAER S.A. ERJ 190-300 and ERJ 190-400 airplanes. It informs the civil aviation community about improvements and fixes in this software version, including safety-related corrections. The bulletin is informative and does not impose mandatory requirements or an Airworthiness Directive under RBAC 39 at this time.
What Changed
The PRIMUS EPIC software Load 7.5 (P/N PS60003155-0105) introduces several system improvements such as engine fan speed synchronization to reduce noise, correction of file generation issues, fixes for uncommanded Primary Flight Display selections, faster Crew Alerting System message activation, and enhanced autothrottle performance. It also resolves a critical unsafe condition where barometric pressure settings could change without crew input, potentially causing erroneous altitude indications and risks including loss of control or controlled flight into terrain. Additionally, this version enables new optional features like Autoland and Steep Approach operations.
Why It Matters
This bulletin is important for operators and maintenance organizations because reinstalling software versions prior to Load 7.5 could reintroduce serious safety risks related to incorrect altitude information and flight crew spatial disorientation. Ensuring the latest software version is installed helps maintain flight safety and compliance with manufacturer recommendations. It also prevents potential operational hazards and supports the safe management of critical flight parameters on EMBRAER ERJ 190-300 and ERJ 190-400 aircraft.
What To Do
Operators, airplane owners, and certified maintenance organizations must avoid reinstalling any PRIMUS EPIC software version earlier than Load 7.5 on ERJ 190-300 and ERJ 190-400 airplanes. EMBRAER S.A. is advised to establish procedures to prevent distribution of earlier software versions to these aircraft owners and operators. No specific compliance deadline is stated, but adherence to these recommendations is critical to prevent recurrence of the unsafe condition.