What was found
LH WNG CENTER FLAP RIB UPPER FLANGE FOUND 2EA CRACKS AT RIB11 BETWEEN STGR2.7 AND REAR SPAR COMPLIED WITH EA 6-5750-T0378165 P1 REPAIRED THE LH WING CENTER FLAP CRACKED RIB UPPER FLANGE AT RIB11 BETWEEN STGR2.7 AND REAR SPAR. TITLE: WING - FLIGHT SURFACES - LH CENTER FLAP CRACKS IN UPPER FLANGES OF RIBS 11,13,15,18,189,25 AND 26 AT STR. 2.6 / 2.7 / 2.8 - ALT 575306-01-1A. THIS IS CAT A REPAIR. MAJOR REPAIR IAW FEDEX GMM6-2-100.SEE WRI 57- 50/FOR WORK DETAILS.