How many latches must be unlatch to reset the nose door CAS?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (C)

Releasing all latch points is required to reset the nose door CAS because the system uses multiple mechanical fasteners to confirm the door is truly disengaged and not stuck in a partially latched state. There are four latches that secure the nose door, two on each side, and the CAS relies on the status of these latches to determine whether the door is fully closed and the system can perform a reset. If any one latch remains engaged, the door may not be properly seated or the fault condition may still be present, so the CAS would not reset correctly. By unlatching all four, you guarantee a complete mechanical release, allowing the system to reset, recheck door position, and return to normal operation once the door is properly resecured. This redundancy protects against false alarms and ensures safe, reliable operation of the nose door.