What was found
L/H AILERON L/E CHAFFING MULTIPLE AREA NOTED L/E UPPER FIXED SKIN (MARKED) (C-CHECK RO 6/20/2023) BLENDED OUT CHAFFING DAMAGE IN THE L/H AILERON L/E UPPER FIXED SKIN AT MULTIPLE AREAS. REF: CRJ-200 SRM 51-12-00. FOUND TO BE OUT OF LIMITS REF CRJ 200 SRM CRJ-200 SRM 57-60-00. REMOVED AND INSTALLED NEW L/H AILERON UPPER SKIN IAW CRJ 200 SRM 51-42-06 AND CRJ 200 SRM 51-42-21 AND DWG CC670-13000 REV. D, COMPLIED WITH 51-900-1003-SKY