The FAA expanded an emergency airworthiness directive first issued last week for Boeing MD-11 and MD-11F aircraft, extending the order to include MD-10 and multiple DC-10 variants.

The updated directive, released Friday, cites structural similarities in the engine-pylon design across the models. For this reason, it requires operators to halt further flight until each airplane completes an FAA-approved inspection and any necessary corrective actions. The agency said the broader grounding is an interim measure and noted that the cause of the original failure remains under investigation.

According to the FAA, the action supersedes the prior AD, which was issued on November 8 following the crash of a UPS MD-11 during takeoff in Louisville, Kentucky. In that earlier directive, regulators proh

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