Airworthiness DirectiveEASA AD US-2023-12-10

Aircraft Flight Manual - Limitations / Operating Procedures - Amendment

Published: Jun 23, 2023
Effective: Jun 21, 2023
Deadline: Jun 30, 2023
Replaces: 2022-02-16

Boeing 787 8 9 10

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Operators of Boeing 787-8, 787-9, and 787-10 airplanes must revise their airplane flight manuals to incorporate the new limitations and operating procedures as specified in the amendment. Compliance with these revisions is mandatory by June 30, 2023. Affected stakeholders should monitor FAA Domestic Notices for updates on 5G mitigated airports and may request approval for alternative methods of compliance if applicable.

Summary

The Aircraft Flight Manual - Limitations / Operating Procedures - Amendment is a final rule issued by the Federal Aviation Administration (FAA) addressing Boeing Model 787-8, 787-9, and 787-10 airplanes. It updates airworthiness directives related to limitations and operating procedures in the airplane flight manual due to interference from 5G C-Band wireless broadband operations affecting radio altimeters. This amendment aims to enhance safety by mitigating risks associated with degraded landing performance caused by 5G interference.

What changed

This amendment supersedes Airworthiness Directive 2022-02-16 and requires revising the limitations section of the airplane flight manual to prohibit certain landings and the use of specific minimum equipment list items for affected Boeing 787 models. It retains the previously required operating procedures for calculating landing distances in the presence of 5G C-Band interference. The amendment also introduces new limitations applicable at all airports for non-radio altimeter tolerant airplanes and allows some operations at 5G mitigated airports for radio altimeter tolerant airplanes.

Why it matters

This amendment is critical for aviation professionals because 5G C-Band interference can cause radio altimeters to malfunction, leading to improper system transitions during landing and increased landing distances. Operators, maintenance, and compliance teams must understand and implement these limitations to prevent runway excursions and ensure safe aircraft operations. The directive addresses an evolving risk due to expanded 5G deployment across the United States.

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