As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLOSING THE L1 DOOR, TWO DESCENT DEVICES FELL OUT OF THE DESCENT DEVICE CONTAINER AND THEY UNWOUND TO THE FLOOR. WHILE THE AIRPLANE WAS GROUNDED, THE DESCENT DEVICES WERE REPLACED WITH SERVICEABLE DESCENT DEVICES. THE CAUSE FOR THE DESCENT DEVICES DROPPING TO THE FLOOR IS UNKNOWN.