What was found
PDX: LT TRAILING WING BOX BRACKET IS LOOSE YW 60. MAINTENANCE REMOVED 2 CHERRY MAX RIVETS IAW Q400 SRM 51-42-45-330-801, PAR 1-6A AND C. DRILLED HOLES TO AN ALTERNATE FASTENER SIZE REF RD 8/4-57-257. HFEC AROUND HOLES IAW 1-84-7A, PT-6, 51-00-02. NO CRACKS NOTED. PRIMERED AND SEALED REF RD 8/4-57-257. INSTALLED AFT 2 CHERRY MAX RIVETS IAW Q400 SRM 51-42-45-330-801, PAR E-G. COMPLETED RD 8/4-57-257 BY PAINTING.