As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS IN FOR HEAVY CHECK FOUND CRACK SUPECTED ON LT HORIZIONAL STABILIZER RIB 12 BTW FRONT SPAR AND MID SPAR. MX REPLACED HORIZIONAL STABILIZER RIB 12 PN 170-62642-601 BTW FRONT SPAR AND MID SPAR IAW SRM 51-41-01, SRM 51-41-02. AC REMAINS IN YRQ FOR COMPLETION.