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The world is being quietly rearranged by people who write very long documents.

Federal Register · August 27, 2025
The title they went with Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes Noisy translates that to

Airlines must now check two systems before flying with a broken hydraulic pump

What happened
US aviation regulators have tightened rules for certain ATR airplanes. Airlines can no longer fly these planes if a main hydraulic pump is broken and another electrical system is also faulty.
Why it matters
Previously, airlines could dispatch these planes with a broken main hydraulic pump, assuming other systems would cover it. This rule change means they must now actively check for a specific electrical failure that could compound the problem. It closes a loophole that could lead to multiple system failures in flight.
The signal
Watch for any reported incidents involving these specific ATR models that highlight hydraulic or electrical system failures, especially if they occur after this rule takes effect.
If you insist
Read the original →