As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-21 CHECK, DISCOVERED RT HORIZONTAL STAB CHANNEL CRACKED ON AFT SPAR WEB AT STAB STATION 170. MX CUT OUT CRACKED SECTION ON AFT SPAR WEB AT STAB STATION 170 AND FABRICATED REPLACEMENT PARTS IAW BOEING 737-300 SRM 51-70-11-0 FIG 1. BONDED AND INSTALLED FABRICATED REPAIR PARTS IAW BOEING 737-300 SRM 51-70-11-0 FIG 1.