The undercarriage selector down lock continues to make progress. The dome handle requires casting along with the addition of the set lever spring and minor adjustments.
The other components have been assembled such that the lever can operate through its 3 positions, Undercarriage up, Undercarriage down and protected from up selection and in the cocked position for take-off where the undercarriage can be selected up.
The lock mechanism was introduced to prevent unintentional retraction of the undercarriage on the ground.