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Old 12th Oct 2015, 16:20
  #3316 (permalink)  
Greasy Monkey
Join Date: Mar 2015
Location: Madrid, Spain.
Posts: 2
A simpler solution.

The autopilot system having the ultimate control over the door lock - whenever pre-set deviation limits for the flight controls are exceeded, the door is unlocked. The door lock should also be designed as fail-safe - requires power to retain locked state.

These deviation limits should be set according to the flight plan/route (automated calculation of % deviation, or similar), and if they are to be over-ridden, require two valid pass-codes from the assigned crew.
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