What was found
PDX: C3 CHECK, - RT WING OUTBOARD FLAP, UPPER SURFACE IS CHAFED BETWEEN APPROX YW 211 AND YW 220, 15 INCHES FROM FLAP TRAILING EDGE. MAINTENANCE REPAIRED IAW Q400 SRM 57-52-30, NDTM PART 6, 51-00-01, 1-87-7A, PART 1, 51-00-04, AND HORIZON EA 6-57-502.