[SystemSafety] Boeing 787 position flaw

[Robert Schaefer]

Two ATC agencies 'blacklist' 787 over position-data flaw
10 DECEMBER, 2015 BY: STEPHEN TRIMBLE WASHINGTON DC
"Most of the Boeing 787s delivered to date contain a software defect that, in at least five identified aircraft, have erroneously reported their location to controllers, prompting two air traffic management agencies to put the Dreamliner on a “blacklist” for certain services."

https://www.flightglobal.com/news/articles/two-atc-agencies-blacklist-787-over-position-data-419916/ <https://www.flightglobal.com/news/articles/two-atc-agencies-blacklist-787-over-position-data-419916/>

How do you test transponders? 
Do you fly all over the world transponding, or do you generate and accept test data from a stationary test site?
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