This one is certainly a brain teaser !
Two Lufthansa Cargo aircraft, D-ALCC and D-ALCG at the same FL and with the same squawk code ! There is probably only one aircraft but how did this happen ? 'Both aircraft' were on screen for at least 30 minutes. Only regret in hindsight is that I did not check when the signal dropped. The only way I can figure it happening is that one aircraft had two boxes with separate hex codes set or that somehow two separate aircraft had the same squawk code assigned, and I don't know if the latter is possible given ATC procedures.
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