As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GYR - MAJOR REPAIR - DURING C20 CHECK DISCOVERED ANGLE, AT BL 16 AND FROM BS 274 TO BS 294, CORRODED BEYOND SRM LIMITS. MAINTENANCE REMOVED CORRODED ANGLE AND INSTALLED NEW ANGLE AT BL 16 AND FROM BS 274 TO BS 294 IAW BOEING 737-300 SRM 51-40-02.