Flight Controls - Flight Control Electronics Common Block Point 5 Software - Installation
- Published
- Effective
- Deadline
- Replaces
- 2015-14-07
- Replaces
- 2016-07-10
- Replaces
- 2016-24-09
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must install the FCE CBP5 software as specified in Boeing Alert Requirements Bulletin B787-81205-SB270044-00 RB, Issue 002, by November 13, 2020. They must also complete concurrent or prior required actions per referenced service bulletins and may credit prior installations done under earlier service bulletin versions. Compliance with this AD terminates the requirements of the superseded ADs.
Summary
Airworthiness Directive 2020-20-09 is a final rule issued by the Federal Aviation Administration addressing certain Boeing 787-8 and 787-9 airplanes. It requires the installation of flight control electronics common block point 5 (CBP5) software to correct deficiencies in the flight control module software, including issues with unannunciated dual symmetric inboard slat skew and erroneous airspeed data. This directive supersedes previous ADs 2015-14-07, 2016-07-10, and 2016-24-09.
What changed
This AD supersedes three prior ADs and mandates installing updated FCE CBP5 software that resolves multiple unsafe conditions such as erroneous airspeed displays, potential simultaneous resets of all flight control modules, and unannunciated slat skew. It also updates service bulletin references and clarifies compliance requirements, including allowing credit for prior actions done under earlier service bulletin issues.
Why it matters
This AD is critical for operators and maintenance teams to ensure continued safe flight and landing of Boeing 787-8 and 787-9 airplanes by addressing software deficiencies that could lead to loss of flight control or adverse handling. Compliance prevents sudden airspeed drops and temporary loss of controllability, thereby enhancing operational safety and regulatory compliance.
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