What was found
DURING C-09 CHECK EXFOLIATION CORROSION WAS FOUND ON CABIN SHEAR DECK HAT CHANNEL BS 1714-1716, RBL 12. MAINTENANCE REMOVED DAMAGED HAT CHANNEL BS 1714-1716, RBL 12; FABRICATED A NEW REPLACEMENT HAT CHANNEL PER DWG 146N5300; INSTALLED REPAIR PART IAW B757-200 SRM 51-40-05, PG. 1, 2, & 5.