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Gary,
When I first started flying I had a
bad data card for my Apollo GX-60, which UPS at the time blamed on a wiring
problem. After re-wiring my entire radio stack over several weeks, the
problem was still there. We then tried a data card from another
plane, which worked. UPS sent me a new card in exchange for
mine. My radios worked and their test plane with my card started
experiencing the same problem I did.
Bottom line, bad cards do happen and
they can cause the software in the GPS to do things that even the manufacturer
has never seen.
Skip Slater
N540ES
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