Beyond the most likely cause being the repetitive data spool/drum update data field error there is more. For those of you that want to geek out on all the ways an IBM model 29 can fail and provide erroneous data output just have a quick look at the maintenance manual. By today's standards it is pretty needy. Look at pages 9 through 14 for failure tree diagrams.
http://bitsavers.org/pdf/ibm/punched..._Man_Nov70.pdf
AND:
After looking at the outcome to this investigation we have decided to supplement the informational conclusions to the previous 1968 POP thread to reference this thread.
As to the remaining workers that I have befriended from the Norwood Plant I am going to miss these people when they all leave us for good.
