HomeUncategorizedDisaster 1st-Person View
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azlibertarian
azlibertarian
1 month ago

One of the YouTube channels that I follow is run by a guy named Juan Browne. Juan is a 777 First Officer and I believe also an A&P Mechanic. Anyway, every time that there is an aviation accident, Juan’s channel is one of the first places that I go to for an accurate explanation.

With regard to UPS 2976, Juan has several videos up, but his most recent explains what failed.
https://youtu.be/q5OQzpilyag?si=Yp_CBeJw83bRThOs

ghostsniper
ghostsniper
1 month ago
Reply to  azlibertarian

Watched it. Was better than I expected.
Can’t help it. I’m a structural engineer and tend to view EVERYTHING through structural eyes.

Knowing almost nothing about aircraft, when looking at the crossectional drawing of the rear engine mount I was surprised at how UNrobust it seemed. The 3 parts in question, RED bearing, BLUE race, YELLOW lug.

The lug is the overall engine mount and must be very strong. The bearing allows the spinning engine shaft to turn fluidly. The race acts as a slippery surface for the bearing to turn.

In the pic of the interior surface of the race there was severe pitting causing instant and massive wear on the bearing surface. I have seen pitting like this before, in a motorcycle engine. It was caused by lack of lubrication AND seemingly a flaw in the metal make up of the race though the flaw may have been causal to the lack of lubrication.

The narrator pointed out a zerk fitting that may have not been addressed in the required maintenance causing the inadequate lubrication to the race.

Read Michael Crichton’s book “Airframe” for some scary stuff behind the scenes in how the entire commercial aircraft stuff is put together. Pretty scary. I’ll never fly on one.

The common nitwit retort is that commercial airlines are by miles flown the safest means of transportation. While that may be true it is not evidence of the overall safety.

The question should be about “survivability” in the event of a crash. Number of miles is irrelevant. Long ago, I walked away from 3 car crashes. How many people have walked away from 3 plane crashes?

DT
DT
1 month ago
Reply to  ghostsniper

I once worked for large aircraft manufacturer. I hate that company with a deep passion. I’m surprised there aren’t more crashes. Essentially a buyer of large airplanes has two choices: low-bid union labor (and save-a-buck management) or a consortium of govt committees. Doesn’t help that maintenance is not a profit center.

I agree with you on “safety” statistics. As the pilot tells his passengers: “We’ll beat the ambulances to the scene” (Sorry azlib!)

Add in all the other crap associated with flying commercial … I drive cross-country.

jean
jean
1 month ago

I made it through 30 minutes.. 🙁

jean
jean
1 month ago

‘flashover’…is there a story there?