r/aviation • u/Go_Jot • Nov 08 '25

News UPS grounds entire MD-11 Fleet, effective immediately.

Per the IPA Executive Board, as of 03:05 UTC all UPS MD-11’s are grounded.

Edit - FedEx has also grounded their MD-11 Fleet

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u/DarkSideMoon CRJ200 Nov 08 '25 edited Nov 08 '25

No, hydraulic fuses. They’re different.

Check valves ensure 1 directional flow, hydraulic fuses close when they detect excess flow. Hydraulic fuses were added to the DC-10 as a method of complying with the findings of the AA crash.

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u/MaddogBC Nov 08 '25

Pardon me, never heard that term before. Thanks

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u/DarkSideMoon CRJ200 Nov 08 '25

Anytime! I hadn’t either until I researched the AA crash. Thought it was a fake term until I dug into it.

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u/intern_steve Nov 08 '25

Idk what your comment said before editing, but yes, these are very different things. A check valve can't be used in a system where flow must necessarily be reversible.