What was found
WHILE COMPLYING WITH SB 236. AILERON SPAR IB HINGE INSPECTION AND REINFORECMENT DATED MARCH 9, 2004 PART 1, BOTH AILERON IB SPAR WEBS AT IB HINGE AREA WERE FOUND CRACKED, THE AFT AND FORWARD END RIBS ALSO SHOWED CRACKS. WHILE COMPLYING WITH THE NEEDED REPAIRS IAW PART III, A CRACK WAS FOUND ON THE CENTER SPAR JUST OB OF THE CENTER HINGE UPPER ATTACH BOLT AREA. AFTER REMOVING THE CENTER SPAR WEB IT WAS FOUND TO HAVE A CRACK GENERATING AT EACH BOLT HOLE. MFG WAS NOTIFIED OF OUR FINDINGS. (PROBABLE CAUSE SEEMS TO BE AGE RELATED.)