Cockpit door lock auto-unlock is no surprise

This report describes findings from reverse engineering a cockpit door lock controller, revealing that dual pressure transducers trigger auto-unlatch/open behavior during rapid depressurization to reduce stress on the cockpit bulkhead—behavior observed during Alaska 1282 and contextualized with lessons from Germanwings 9525; the authors withheld details previously for safety but now publish to inform pilots about door behavior in explosive decompression events.