What was found
*BACKUP SILL (INTERCOSTAL) AT APPROX. FS.310-FS.333, STRG 21L HAS MULTIPLE SPOTS OF CORROSION (C CHECK RO 1/18/2022) REPLACED BACKUP SILL (INTERCOSTAL) AT APPROX. FS.310-FS.333, STRG 21L WITH NEW. REF BACKUP SILL (INTERCOSTAL) AT APPROX. FS.310-FS.333, STRG 21L REF BOMBARDIER DWG# SH670-31810 REV Y AND CRJ700 SRM 51-42-06-001-001 A01 AND 51-42-21-001-001 A01. COMPLIED WITH 51-900-1002-SKY