What was found
DURING HEAVY CHECK, RT HORIZONTAL STAB RIB 12 UPPER FLANGE BETWEEN FRONT AND MID SPAR IS CRACKED. MAINTENANCE RT RIB 12 WAS REPAIRED IAW ETD 2014-170-053874. THIS REPAIR REQUIRES REINSPECT IAW ETD 2014-170-053874 BY USING FOLLOWING TASK 55-10-017-001, INTERNAL DET THRESHOLD OF 20000 F/C IS SUFFICIENT AND IS MET USING INSPECTION REQUIREMENTS: MPG/MRBR, REVISION 9, THRESHOLD COUNTED SINCE NEW. TRANSFERED TO NON MELDMI 410693/2 FOR 6 MONTHS TO ALLOW INCORPORATION TO THE INSPECTION, MAINTANENCE PROGRAM IAW GMM 9.5.4 FCBS 55-10-00-005 WAS EFFECTED.