As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INSTALLATION IN THE ACFT - BACK OF THE UNIT CAME OFF IN THE TECHNICIAN'S HANDS. FURTHER INVESTIGATION FOUND THAT BLACK ELECTRICAL TAPE WAS COVERING BROKEN OUT INSTRUMENT CASE MOUNTING HOLES FOR THE REAR PLATE. THE ONLY THING HOLDING THE INSTRUMENT TOGETHER WAS THE ELECTRICAL TAPE. THE TURN AND BANK CAME OFF THE SHELF FRESH BACK FROM OVERHAUL.