What was found
DURING A SCHEDULED C-CHECK, FOLLOWING REMOVAL OF BOTH ENGINES, A VISUAL INSPECTION IDENTIFIED FOUR APPROXIMATELY 1.5-INCH CRACKS, TWO ON EACH SIDE OF THE AIRCRAFT, IN THE RIB FIREPROOF PYLON SKIN, P/N 145-21430-402 SAME ON BOTH SIDES. PROPOSED REPAIR HAS BEEN SUBMITTED TO EMBRAER FOR ENGINEERING REVIEW AND APPROVAL.