What was found
DURING HEAVY CHECK MAINTENANCE FOUND CRACK INTERNALLY RT HORIZONTAL STABILIZER RIB 11A BETWEEN FRONT SPAR AND MID SPAR, UPPER RIVET ROW JUST AFT OF 5TH RIVET FROM FRONT SPAR. REMOVED AND REPLACED RIB 11A ON RT HORIZONTAL STAB, REF SRM 51-40-08, PREPPED, PRIMED AND PAINTED REPAIR REF SRM 51-23-04,SRM 51-23-05, SRM 51-23-06. A/C REMAINS IN CHECK.