Door latch positioning mechanism

A latch positioning mechanism for a door of an aircraft, comprising:

• a pivot pin;
• one or more locking members operatively connected to the pivot pin, wherein the one or more locking members are configured to be partially driven into a frame around the door via rotation of the pivot pin;
• a frame bumper configured to extend outside of the door in a pre-catch position for contacting the frame surrounding the door;
• a catch bellcrank operatively coupled to the frame bumper;
• a biasing member operatively coupled to the catch bellcrank, wherein the biasing member biases rotation of the catch bellcrank to bias the frame bumper into the pre-catch position;
• a catch cam operatively coupled to the pivot pin, wherein the catch bellcrank is configured to contact the catch cam when the catch bellcrank is biased into the pre-catch position such that the catch cam prevents release of the one or more locking members for locking the door;
• the frame bumper is configured to contact the frame upon the door being closed thereby counterrotating the catch bellcrank to overcome the biasing member and release the catch cam enabling the one or more locking members to be moved into a locked position;
• and
• an elastic member operatively coupled to the catch cam for biasing the catch cam such that a first side of catch cam is biased towards the catch bellcrank.

A pre-catch latch positioning method for a door of an aircraft, comprising:

• extending a frame bumper outside of the door into a pre-catch position;
• contacting a frame surrounding the door with the frame bumper upon closing of the door;
• rotating a catch bellcrank operatively coupled to the frame bumper via a biasing member, wherein the biasing member biases rotation of the catch bellcrank to bias the frame bumper into the pre-catch position;
• and
• contacting a catch cam via the catch bellcrank when the catch bellcrank is biased into the pre-catch position thereby preventing release of one or more locking members for locking the door,
• wherein contacting the frame with the frame bumper upon closing of the door comprises counterrotating the catch bellcrank to overcome the biasing member and release the catch cam enabling the one or more locking members to be moved into a locked position.