So Hoser.... RE:2017 KC-13-T Mmississippi crash report......

[Ridge]

It sounds like it was just shear failure, that thrown prop blade just tossed around the plane so sharply that it overstressed the prop hub on the other side, and then the fuselage buckled.

[USMC88-93]

I don't understand how an entire propeller can cut loose. I'm not familiar with the mechanical assembly connecting the propeller to the engine.

Instantaneous in this case is a relative term, as perfectly balanced as propellers are, I would imagine the vibration of one missing a blade would send all kinds of instantaneous effects across the entire airframe causing a domino effect of catastrophic damage.

[Gman]

Wow. That's just awful.

[spqrzilla]

The report was quite an infuriating piece to read regarding how sloppy Warner Robins record keeping and processes were.

[BushMasterBoy]

If the disintegrating propeller, cuts the control lines, catastrophic failure can occur.
Just my 2 cents.

"Each engine is equipped with a Hamilton Standard, four-blade, electro-hydromatic, full-feathering, reversible-pitch propeller. The propeller operates as a controllable-pitch propeller for throttle settings below flight idle and as a constant-speed propeller for throttle settings of flight idle or above. The major components of the propeller system are the propeller assembly, the synchrophasing system, the control system, and the anti-icing and deicing system"

https://info.publicintelligence.net/USNavy-C130T.pdf

[Ridge]

It didn't cut the control lines, it cut into the longeron, a structural assembly that goes along the length of the aircraft fuselage. Essentially, these props cut the plane's spine.

[USMC88-93]

It didn't cut the control lines, it cut into the longeron, a structural assembly that goes along the length of the aircraft fuselage. Essentially, these props cut the plane's spine.

I've described it similarly but substituted keel instead of spine using naval terms on how a ship can break its back.

[Justin]

What a terrible way to go.

[Gman]

It didn't cut the control lines, it cut into the longeron, a structural assembly that goes along the length of the aircraft fuselage. Essentially, these props cut the plane's spine.

That's a good way to describe it. Once the forward portion of the fuselage separated, control lines meant nothing.

[BushMasterBoy]

Has anyone actually commanded a C-130 as PIC in this thread?