As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS IN BASE MAINTENANCE. LEFT HAND HORIZONTAL STABILIZER STA 129, 6TH RIB OUT FROM INBOARD SIDE, RIB HAS A CRACK IN THE 3RD STIFFENER AFT AT BOTTOM. INSTALLED ANGLE AND T-DOUBLER PER SRM 55-10-09-2R-4, REPLACED RIB PER 55-10-00-2.