What was found
PDX: C3 CHECK - RT WING, INBOARD FLAP, UPPER SURFACE IS CHAFED 19 INCHES FROM THE TRAILING EDGE OF FLAP AND 6 INCHES FROM INBOARD END. MAINTENANCE REPAIRED IAW Q400 SRM 51-14-00, NDTM PART 6, 51-00-02, 1-84-7A PART 1, 51-00-04 AND HORIZON EA 6-57-501.