Re: Kinked air hoses, turned angle cocks, FRED, and PTC????
Author: Dr Zarkoff
Date: 11-08-2018 - 23:39

> IF the FRED was actually working and just a case of lost communication. From what I have been reading and hearing FRED gets beat up on regularly and can an intial air test really be depended upon to see if FRED will work?

A plug test with a two-way FRED is required, meaning "try plugging the train with FRED," although I'm not 100% acquainted with when and where it must be done.

> Actually what should be followed up after this accident is what is the failure rate of FRED to respond after x amount of months of use. Should they be required to be fully taken apart and rebuilt every 6 months or a year? Small price to pay for a device that has such a great responsibility.

OK, let's see here, the cleaning interval for ABD, ABD-W, and ABDX is "until failure", which many times can be measured in tens of years. When I started railroading, the cleaning interval for AB was something like 3 or 5 years, which could be extended by an IDT (In Date Test). The electronics in a FRED are a completely different matter.



Subject Written By Date/Time (PST)
  NTSB preliminary report on UP rearend collision in Wyoming OPRRMS 11-05-2018 - 12:01
  Re: NTSB preliminary report on UP rearend collision in Wyoming OPRRMS 11-05-2018 - 12:15
  Re: NTSB preliminary report on UP rearend collision in Wyoming Ross Hall 11-05-2018 - 17:19
  Re: NTSB preliminary report on UP rearend collision in Wyoming Nudge 11-05-2018 - 20:04
  Re: NTSB preliminary report on UP rearend collision in Wyoming amtrakfan4ever 11-05-2018 - 20:44
  Re: NTSB preliminary report on UP rearend collision in Wyoming 1st cajon 11-05-2018 - 21:52
  Re: NTSB preliminary report on UP rearend collision in Wyoming WebDigger 11-05-2018 - 21:17
  Re: NTSB preliminary report on UP rearend collision in Wyoming SPKID 11-06-2018 - 07:26
  Re: NTSB preliminary report on UP rearend collision in Wyoming john 11-06-2018 - 08:11
  Re: NTSB preliminary report on UP rearend collision in Wyoming Espee99 11-06-2018 - 09:37
  Re: NTSB preliminary report on UP rearend collision in Wyoming Retired 11-06-2018 - 10:02
  Kinked air hoses, turned angle cocks, FRED, and PTC???? BOB2 11-06-2018 - 10:29
  Re: Kinked air hoses, turned angle cocks, FRED, and PTC???? jst3751 11-08-2018 - 09:48
  Re: Kinked air hoses, turned angle cocks, FRED, and PTC???? Dr Zarkoff 11-08-2018 - 23:39
  Re: Kinked air hoses, turned angle cocks, FRED, and PTC???? steve 11-11-2018 - 14:23


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