Instruments - Honeywell Primus EPIC Software - Installation
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Embraer ERJ 190 aircraft must install the required Primus EPIC software updates within 48 months from the effective date of October 21, 2019. Installation must follow the specified Embraer service bulletins or ANAC-approved methods. Compliance must be recorded in maintenance logs, and alternative compliance methods require ANAC approval.
Summary
Brazilian Airworthiness Directive AD No. 2019-10-01 issued by the Agência Nacional de Aviação Civil (ANAC) mandates software updates for Honeywell Primus EPIC systems installed on Embraer S.A. ERJ 190 series aircraft. This directive applies to all serial numbers of ERJ 190-100 and ERJ 190-200 models equipped with specific versions of the Primus EPIC software. The directive addresses safety concerns related to erroneous engine parameter indications and autopilot anomalies.
What changed
This new directive requires operators to update the Honeywell Primus EPIC software to versions 25.8, 27.2, or 27.3 or higher depending on the aircraft model and autopilot configuration. It discontinues the use of software versions 27.1 and earlier versions up to 25.7, as well as version 27.2 for aircraft with Autoland function. The directive also specifies approved service bulletins and methods for installation.
Why it matters
The directive addresses critical safety issues including incorrect engine parameter displays and uncommanded autopilot pitch movements that could affect takeoff and landing phases. Compliance ensures flight safety by preventing potential misinterpretations by flight crews and autopilot malfunctions. Operators, maintenance organizations, and compliance teams must update software to avoid unsafe conditions and regulatory violations.
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