As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE UNIT PASSED ALL TESTS AND WAS READY TO BE SHIPPED BACK TO THE CUSTOMER. WHEN THE TECHNICIAN NOTICED A RATTLE INSIDE THE UNIT. THE UNIT WAS OPENED AND A WASHER WAS FOUND LOOSE INSIDE. THE WASHER WAS NOT A PART OF THE ASSEMBLY AND ITS ORIGIN WAS UNKNOWN. THE WASHER WAS REMOVED AND THE UNIT WAS RETESTED, TESTED GOOD AND WAS RETURNED.