What was found
PIECE, JOINT AT STR 21R, IS CORRODED, BETWEEN FS379 AND FS394. REMOVED AND INSTALLED ATTACHED RIVETS TO THE SKIN AND VERTICAL FLANGE OF JOINT PIECE P/N: SH67032301-5, AT STR 21R BETWEEN FS 379 TO FS 394, IAW CRJ-700 SRM 51-42-06-001-001-A01.