What was found
AFTER REMOVAL BEARING AND BUCHINS THE RH AILERON CORROSION WAS FOUND INSIDE OF LUG BORE HINGE # 1 AND CENTER FITTTING BORES LUGS R 1, R 2, R 5 AND R 6 HINGE # 4 BORES LUGS UPPER AND LOWER ALSO NICKS ON HINGE LUGS R 1 AND R 2 IN EXTERIOR AT RH AILERON. HINGE # 1 LUG BORE AND CENTER FITTTING BORES LUGS R 1 , R 2 , R 5 AND R 6 HINGE # 4 BORES LUGS UPPER AND LOWER AT RH AILERON WERE CLEANED PER CRJ 900 SRM 51-26-00-001-001-A01 THEN INSPECTIONED PER CRJ/900 NDT MANUAL 51-20-009-210 (CONFIG A01) AND NOT DAMAGE WAS FOUND; HINGE LUGS R1 AND R2 IN EXTERIOR AT RH AILERON WERE REPAIRED PER REO 670-57-61-237 REV - -. FINALLY, OVERSIZE BUSHINGS FOR LUGS R1, R2, R5 AND R6 WERE FABRICATED PER REO 670-57-61-237 REV - -.