Navigation — Airborne Collision Avoidance System Display Software — Update
- Published
- Effective
- Deadline
- Replaces
- 2019-0179
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must amend the applicable Airplane Flight Manual or supplements within 30 days after 31 July 2019 to restrict ACAS operation to 'TA ONLY' mode and install appropriate placards. Within six months after 31 July 2019, they must install the updated FDSA-6500 software following approved instructions. After modification, the temporary AFM changes and placards must be removed and replaced with updated manuals as specified. Compliance with these actions is mandatory to continue operation.
Summary
EASA Airworthiness Directive 2019-0179R1 is an update addressing the Rockwell Collins FDSA-6500 flight display software used in Textron Aviation B200, B300, and C90GTi aeroplanes, among others. The directive mandates software updates and operational changes to the Airborne Collision Avoidance System (ACAS) display to correct conflicting indications during Resolution Advisory scenarios. It applies to aircraft modified by specific Supplemental Type Certificates and production modifications involving the Collins FDSA-6500 system.
What changed
This revision of EASA AD 2019-0179 includes references to BHE & Associates Ltd Service Bulletins as acceptable compliance methods for certain aircraft modified under EASA STC 10060629. It also incorporates Textron Aviation Mandatory Service Bulletin MTB-34-02 and introduces related post-modification Airplane Flight Manual Supplements. The update refines compliance instructions and expands acceptable modification procedures.
Why it matters
The directive addresses a safety issue where the ACAS Fly-To Cue display may conflict with aural alerts, potentially leading to pilot misinterpretation and incorrect maneuvering during collision avoidance. Compliance ensures that pilots receive consistent and accurate ACAS information, maintaining safe separation and reducing risk of mid-air collisions. Operators and maintenance organizations must update software and manuals to meet regulatory requirements and maintain airworthiness.
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