Airworthiness DirectiveEASA AD US-2023-12-15

Aircraft Flight Manual - Limitations / Operating Procedures - Amendment

Published: Jun 23, 2023
Effective: Jun 21, 2023
Deadline: Jun 30, 2023
Replaces: 2022-09-18

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What to do

Affected operators must revise their airplane flight manuals to incorporate the updated limitations and operating procedures as specified in the amendment. These revisions must be implemented by June 30, 2023, to ensure compliance with the new requirements before increased 5G C-Band transmissions begin. Operators should review the specific procedures related to ILS and non-precision approaches, ground spoiler deployment, and go-around maneuvers to align with the amended guidance.

Summary

The Aircraft Flight Manual - Limitations / Operating Procedures - Amendment is a final rule issued by the Federal Aviation Administration (FAA) that supersedes Airworthiness Directive 2022-09-18. It applies to Boeing Model 707, 717, 727, DC-8, DC-9, DC-10, MD-10, MD-11, MD-81, MD-82, MD-83, MD-87, MD-88, and MD 90-30 airplanes. The amendment requires revisions to the airplane flight manual to address interference from 5G C-Band wireless broadband operations affecting certain flight systems during approaches and go-arounds.

What changed

This amendment supersedes AD 2022-09-18 by requiring updated revisions to the limitations and operating procedures sections of the airplane flight manual. The changes incorporate specific procedures for instrument landing system approaches, non-precision approaches, ground spoiler deployment, and go-around and missed approaches due to increased 5G C-Band interference. It extends the applicability of these procedures to all affected airports for non-radio altimeter tolerant airplanes and modifies requirements for radio altimeter tolerant airplanes at 5G mitigated airports.

Why it matters

This amendment is critical for aviation professionals because 5G C-Band interference can degrade the performance of radio altimeters and other airplane systems, increasing flightcrew workload and potentially compromising safe flight operations during critical phases such as approach and landing. Operators, maintenance, and compliance teams must ensure that flight manuals reflect the updated procedures to mitigate these risks and maintain regulatory compliance. Failure to comply could lead to unsafe flight conditions and regulatory penalties.

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