Locking and unlocking system for the cockpit door of an aircraft and door with such a system

An aircraft having a cockpit and a cabin comprising:

• a separation door between the cockpit and the cabin able to be locked during flight phases and automatically unlocked in case of acceleration exceeding a selected value, the door comprising a locking and unlocking system comprising:
• a set of electrically controlled bolts configured to lock the door,
• a control unit configured to electrically control the set of bolts,
• a first manual control connected to the control unit, installed in the cockpit and configured to unlock the door,
• a second manual control connected to the control unit, installed in the cabin and configured to unlock the door,
• a switching relay to control automatic unlocking of the door, and
• a system for disabling the locking and unlocking system, the system for disabling the locking and unlocking system comprising:
• an accelerometer configured to detect a constant acceleration exceeding a preselected acceleration threshold value,
• wherein
• the accelerometer sends a signal to the control unit, when the acceleration exceeds the threshold value that indicates that the aircraft is in a dangerous descent,
• the control unit sends a signal based solely on the signal received from the accelerometer to the switching relay that disables the locking and unlocking system after receiving said signal from the accelerometer by activating the switching relay to definitively cut off the electrical power supply for the bolts of the bolt set by grounding the electrical power supply after receiving said signal from the control unit.