Power Plant Mounts — Yoke Washer — Replacement

Published: Nov 22, 2023
Effective: Dec 6, 2023
Deadline: Dec 6, 2023

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

What to do

Operators of affected Falcon 7X and Falcon 8X aeroplanes must inspect the specified washers before exceeding 6,000 flight cycles since the aircraft's first flight. If any non-conforming washers are detected, they must be replaced before the next flight according to Dassault Service Bulletin 7X-564. Alternative methods of compliance may be approved upon request and substantiation.

Summary

EASA Airworthiness Directive 2023-0208 is an airworthiness directive affecting Dassault Aviation Falcon 7X aeroplanes, including Falcon 8X models with specific manufacturer serial numbers. It addresses the replacement of double countersink washers installed on engine 1 and engine 3 forward yokes. The directive mandates inspection and potential replacement of these washers to ensure continued airworthiness.

What changed

This new airworthiness directive introduces a one-time inspection requirement for the double countersink washers with part number F7XC541221115A2 installed on the forward yokes of engines 1 and 3. If non-conforming washers are found, they must be replaced before the next flight. The directive is based on Dassault Service Bulletin 7X-564 and is a newly issued regulation with no superseded ADs.

Why it matters

This directive is critical for aviation professionals because non-conforming washers may cause cracks in bolts or engine forward yokes, potentially leading to loss of a lateral engine. Operators and maintenance organizations must ensure compliance to prevent unsafe conditions and maintain aircraft airworthiness. Compliance helps avoid operational disruptions and ensures regulatory adherence.

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