I’m curious as to why the Dc-10s weren’t included in the AD. Different pylon structure?

I don’t think any are still flying

The last FedEx MD-10 was pulled in December 2022. I do believe Orbis is operating the MD-10 still....

I believe some -10’s are used in fire fighting.

I went through course when still at American Eagle- was so impressed being taught by a top gun instructor… quickly learned it was bad advice- remember my first thought when AA crashed in JFK- I bet he stomped on rudders just like we were taught- very unfortunate

Yup. AMR got their pee-pee whacked on that one.

What's sad is that there are still a lot of CFI's and professional pilots that think that as long as you are at or below Va, maneuvering speed, you can push or pull on any control without damaging the aircraft. That's only true for positive g's, of course.

The popular misbelief is that a surface will stall before it will break at or below Va, and that just ain't true. That concept applies to a single input, but the generalization overlooks the fact that no consideration is given for reversals or structural flex following a reversal; it wasn't the load from a singular control deflection that broke the American flight; it was the reversal and subsequent induced load on the attach structure.

They are. They are also given a drastically reduced lifespan and taken out of service based on that applied life-limit. Many years ago a NASA study determined that airframes in aerial firefighting incur stresses at the rate of 500-1000 times that of the same airframe in commercial service; the airframe life is reduced accordingly and the aircraft subsequently scrapped upon reaching that low life-limiting value.

They are included now. https://drs.faa.gov/browse/ADFREAD/d...dalOpened=true

Yup.

Try standing up from a squatting position.

Then jump up in the air, land in a squat and try standing up as you bottom out. Actually don't do that, you'll probably injure yourself.