As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 100 HR INSP OF ACFT, SEVERAL RT AND LT STABILATOR TRIM TAB INBD RIBS HAVE BEEN FOUND CRACKED. THE CRACKS ARE LOCATED AT THE RIB BOTTOM FWD CORNER, NEAR THE CONTROL ARM ASSY ATTACH NUTPLATE. SEPARATE THE RT AND LT TRIM TABS BY REMOVAL OF THE CONTROL ARM ASSY, PERMITTING A GOOD VISUAL INSP OF THE RIBS AT INSP TIME. REPLACE RIBS WITH NEW AS NEEDED.