The leaves are going brown in the middle of the leaf. Its got an 18" flower spike on and otherwise seems healthy just the browning of about 8 leaves in the middle of the leaf
Browning of leaf tips can be a normal trait with Spider Plants. If the plants soil is allowed to dry out, the leaves can crack down the center.
This link will refresh you on the care requirements.
When watering, make sure you avoid watering into the crown of the plant.
This will help avoid fungus issues.