EASA AD BR-2022-05-04
Navigation - Primary Flight Displays - Software Installation
Summary
Brazilian Airworthiness Directive AD No. 2022-05-04 issued by ANAC mandates software updates for Honeywell Primus EPIC systems installed on Embraer S.A. ERJ 190100 and ERJ 190200 series aircraft. This directive addresses uncommanded barometric reference settings affecting primary flight displays across multiple ERJ 190 variants. The directive applies to all serial numbers equipped with specific software versions up to 25.8 and 27.1 through 27.3.
What Changed
AD No. 2022-05-04 introduces mandatory installation of updated Honeywell Primus EPIC software versions to correct unsafe conditions caused by data communication architecture issues in flight display systems. It specifies different software versions and service bulletins depending on aircraft model and equipment configuration, with a compliance window of 18 months from the effective date. This AD also supersedes previous software version requirements and covers compliance for ANAC AD 20191001.
Why It Matters
This directive is critical for maintaining flight safety by preventing erroneous barometric reference indications that could increase pilot workload and risk during critical flight phases. Operators and maintenance organizations must ensure timely software upgrades to avoid operating non-compliant aircraft. Compliance ensures adherence to Brazilian aviation regulations and reduces the risk of unsafe flight conditions related to primary flight display errors.
What To Do
Operators of affected Embraer ERJ 190100 and ERJ 190200 aircraft must update Honeywell Primus EPIC software to the specified minimum versions within 18 months of 2022-05-25. The update process must follow the approved Embraer service bulletins corresponding to each aircraft model and configuration. Maintenance teams should record compliance in aircraft logbooks and may seek alternative methods of compliance through ANAC if necessary.
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