[Retired software engineer, no piloting skills.]
It is probably worth reconsidering posting #
1544 (
permalink) on the original thread. In which
cargun stated that:
... back as in September 2007, I read in local forums that THY 737 pilots were complaining about negative left RA readings. They were told and believed this to be harmless and explained with "yet another cell phone activated". Due to such a repetitive error, resolved with a stupid explication, crew may have ceased to report this "harmless error". That might be the reason the previous errors are there on the FDR, yet not on the airplane's maintenance log book.