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

Federal Register · June 23, 2025
The title they went with Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes Noisy translates that to

Old airplanes need more frequent crack checks, but there's a way out

What happened
The US aviation regulator wants to make inspections for cracks on certain De Havilland DHC-8-400 series airplanes more frequent. This means airlines will have to repeat these checks, unless they install a specific fix that makes the inspections unnecessary.
Why it matters
Airlines operating these specific planes will face higher maintenance costs and more downtime for inspections. This proposed rule offers a way to avoid those recurring costs by investing in a one-time modification. It shifts the economic choice from ongoing operational expense to a capital expenditure.
The signal
Watch for how many airlines choose the optional terminating action versus continuing with repetitive inspections, which will indicate the perceived cost-benefit of the modification.
If you insist
Read the original →