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Contract car repair facilities need to be audited periodically.  Same goes for contract train yard inspection.  Savvy car owners thoroughly inspect a car en route to a contract facility to see what really needs to be done, and compare that to what the contractor actually bad-orders and repairs.  Off-line repairs on railroad owned cars have to be reported for payment to a bureau of the AAR, which can see if certain car department locations are making more than normal repairs to foreign line cars.

Gregg:

Wheel Impact Load Detector.  They are a wayside device intended to identify wheels that are defective or developing flat spots and have them changed out before they can damage the rail head or possibly contribute to a derailment.

I first saw one of these devices at the Transportation Technology Center out in Pueblo, CO back around 2000 or 2001 when AAR was working to develop the technology.  They are fairly common on most Class 1 main lines now and broadcast an electronic message to the train crew in much the same manner a dragging equipment or hot box detector would.

Curt

 

Thank you Curt.....     We used to call cars  with flat spots   ...Thumpers...  Most  flats spots were caused by switching crews moving the car with the hand brake still applied, sometimes a sticking brake or emergency brake application.

At the meeting point  on single track  both trains would get a pretty going over()inspection)   There were rules about the length of the flat spots  determining whether the car had to set out or allowed to continue on....

thump thump thump 

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