What was found
DURING AN ANNUAL INSPECTION, A RATTLING SOUND WAS DISCOVERED IN THE LEFT HORIZONTAL STABILIZER. FURTHER INVESTIGATION REVEALED THE TRACK WELD SECURING THE DIAGONAL BRACE TO THE BUTT RIB HAD BROKEN LOOSE DUE TO AN INADEQUATE WELD. THE DIAGONAL BRACE IS NOT A STRUCTURAL MEMBER, BUT IS THERE TO PROVIDE SUPPORT TO PREVENT THE BUTT RIB FROM DEFORMING DURING THE FABRIC COVERING PROCESS. HOWEVER, IF LEFT UNREPAIRED, FURTHER VIBRATION COULD DAMAGE THE BUTT RIB AND/OR THE FACRIC COVERING.