EASA AD US-2025-23-51: Superseded by FAA AD 2025-23-53

What to do

Affected operators must immediately cease flight operations of Boeing MD-11 and MD-11F airplanes until inspections and all corrective actions are completed using FAA-approved procedures. Compliance is mandatory by December 1, 2025, for those not previously notified. Requests for alternative methods of compliance must be submitted to the FAA's Continued Operational Safety Branch for approval.

Summary

FAA Airworthiness Directive 2025-23-51 is a final rule addressing all Boeing Model MD-11 and MD-11F airplanes. It was issued following an accident where the left-hand engine and pylon detached during takeoff, prompting a safety directive to prevent further flight until inspections and corrective actions are completed. This directive aims to ensure continued safe flight and landing of these aircraft.

What changed

This new airworthiness directive prohibits further flight of affected Boeing MD-11 and MD-11F airplanes until they are inspected and any necessary corrective actions are performed using FAA-approved methods. It formalizes the requirements initially issued in Emergency AD 2025-23-51 and establishes December 1, 2025, as the effective date for operators who did not receive actual notice of the emergency AD.

Why it matters

This directive is critical for aviation professionals as it addresses a severe safety risk involving engine and pylon detachment, which could lead to catastrophic failure. Operators, maintenance organizations, and compliance teams must prioritize inspections and repairs to avoid grounding and ensure regulatory compliance. The directive also restricts special flight permits, impacting operational planning and aircraft availability.

What to do

Summary

What changed

Why it matters

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