Superseded by FAA AD 2023-12-05
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must revise the limitations section of their airplane flight manuals to include prohibitions on dispatching or landing at airports with 5G C-Band interference as identified by NOTAMs. Compliance with these revisions is mandatory effective January 27, 2022. Operators should ensure pilots are familiar with these limitations and monitor relevant NOTAMs to maintain safe operations.
Summary
FAA Airworthiness Directive 2022-03-05 is a final rule addressing all Boeing Model 747-8F, 747-8 series, and 777 airplanes. It mandates revisions to the airplane flight manual to prohibit dispatch and landing operations at airports affected by 5G C-Band interference, which can disrupt radio altimeter functions critical to flight control systems. This directive aims to mitigate risks from erroneous radio altimeter data caused by interference from wireless broadband operations in the 3.7-3.98 GHz frequency band.
What changed
This new airworthiness directive introduces operational limitations in the airplane flight manuals of affected Boeing models, prohibiting dispatch and landing when 5G C-Band interference is present as indicated by Notices to Air Missions (NOTAMs). It expands on previous directives by addressing additional hazards including uncommanded pitch control inputs and multiple flight deck anomalies caused by radio altimeter interference. The AD requires immediate compliance to ensure flight safety in the presence of 5G interference.
Why it matters
This directive is critical for aviation professionals because 5G C-Band interference can cause erroneous radio altimeter data, leading to unsafe flight control inputs and misleading flight deck indications. Operators, maintenance, and compliance teams must understand and implement these limitations to prevent loss of safe flight and landing, especially during low altitude operations. The AD highlights the importance of monitoring NOTAMs for 5G interference and adjusting operations accordingly.
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