What was found
STR 21L BACKUP SILL FROM FS 319 TO FS 333 IS CORRODED. REMOVED, LOCATED AND INSTALLED NEW SERVICEABLE STRINGER 21 INTERCOSTAL BETWEEN FS 333 AND 319 P/N SH670-31822-1, IAW CRJ 900 SRM 51-42-06-001-001-A01 AND 51-40-11-001-001-A01.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
STR 21L BACKUP SILL FROM FS 319 TO FS 333 IS CORRODED. REMOVED, LOCATED AND INSTALLED NEW SERVICEABLE STRINGER 21 INTERCOSTAL BETWEEN FS 333 AND 319 P/N SH670-31822-1, IAW CRJ 900 SRM 51-42-06-001-001-A01 AND 51-40-11-001-001-A01.