Western Railroad Discussion > Tehachapi Derailment

There's a reported derailment in Tehachapi on the Mojave subdivision at the Cable Crossovers. Preliminary info. reports approximately 20 cars, accordioned and stringlined. This is milepost 358.

Great, hopefully I won't have to work!


PT

Which happened first; stringline or accordion?

Posted from Android

Hookdragkick Wrote:
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> Which happened first; stringline or accordion?
>
> Posted from Android


Guess it depends on if it was up, or down.


V

SLOCONDR

Phil, you should be OK, things look pretty "frogged"!

GEU50C Wrote:
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> There's a reported derailment in Tehachapi on the
> Mojave subdivision at the Cable Crossovers.
> Preliminary info. reports approximately 20 cars,
> accordioned and stringlined. This is milepost 358.

I'm sure the homeowners that live on the streets close to the Cable crossovers are "thrilled". Hope there's no hazmat involved...


Allen

Train involved is the MWCRVX 06.

UP 5215 North ZLCBR? is reported on the Coast Line at Gemco with a high wide issue?

DRGW Wrote:
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> UP 5215 North ZLCBR? is reported on the Coast Line
> at Gemco with a high wide issue?

Sounds like it is the ZLCBR, Matt. Must have reversed course if it's at Gemco. They can't run two stacked 53 foot domestic boxes on the Coast. Won't clear some of the tunnels north of SLO.


Allen

Derailment is right west of Tucker St. overpass around Iris St. Photo is of end of train units sitting below Tulip Ct.

Tehachap
Cable House
Tehachapi above Cable

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Correction on description of train photo -- units shown were heading NORTH. Train has been separated at the derail, and lead unit plus cars are currently passing through Cable.

Tehachap
Tehachapi Above Cable

Both the stringline and accordion results can happen in the same derailment, two scenarios:
First, if the brakes set up from the rear (maybe an air hose) the slack run-out could stringline some cars between the set up brakes and the head end, and those derailed cars tore up the track so the following cars suddenly stopped completely and accordioned into a pile.
Second, a car derails in the middle of the train and digs into the ties hard (but does not uncouple) enough to simultaneously create a violent slack run-out for a stringline ahead and an accordion of the following cars.
Event recorder downloads can sometimes help figure out what went wrong.

railstiesballast Wrote:
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> Both the stringline and accordion results can
> happen in the same derailment, two scenarios:
> First, if the brakes set up from the rear (maybe
> an air hose) the slack run-out could stringline
> some cars between the set up brakes and the head
> end, and those derailed cars tore up the track so
> the following cars suddenly stopped completely and
> accordioned into a pile.
> Second, a car derails in the middle of the train
> and digs into the ties hard (but does not
> uncouple) enough to simultaneously create a
> violent slack run-out for a stringline ahead and
> an accordion of the following cars.
> Event recorder downloads can sometimes help figure
> out what went wrong.

Mike,

Sorta the ideas I had. Either the DPU's lost power for a moment or as you said an air hose.

J.

J.Ferris Wrote:
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> Sorta the ideas I had. Either the DPU's lost power
> for a moment or as you said an air hose.
>
> J.

Train was Northbound, so it was going downhill. DPU's losing their load (Dropped dynos) would not stringline the train. Excessive dynamics would, though.