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this unit is serial number 2LL-02772
throws a code 7c upon "key on self test". any help would be welcome, my NOR book does not show a 7c code
  • Posted 25 Apr 2014 20:20
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"

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The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.