What was found
AVIONICS BAY IN BETWEEN FS 349.-0 AND FS 364.0 THERE IS CORROSION AT INTERCOSTAL LOWER FLANGE AT 27L. (C CHECK RO 5/23/22) CORROSION DAMAGE ON INTERCOSTAL FOUND TO BE ON MORE THAN ONE ELEMENT, DAMAGE EXTENDS OVER MORE THAN 30% OF PART LENGTH AND IS WITHIN 2D OF FASTENERS MAKING INTERCOSTAL LOCATED BETWEEN FS349.00€”FS364.00 STR27L OUT OF LIMITS REF. CRJ900 SRM 53-21-23-101-003-A02. REPLACE INTERCOSTAL. / REMOVED AND INSTALLED NEW INTERCOSTAL AT FS349.00- FS364.00, BETWEEN STGR 27 AND 26L IAW CRJ900 SRM 51-42-06-001-001-A01, CRJ900 SRM 51-42-21-001-001-A01 AND DWG: SH670-32050 REV J / . PRESSURE LEAK CHECK OF REPAIR AREA CHECKED GOOD, NO LEAKS NOTED REF. CRJ-900 AMM, 21-31-00-910-801-A02 / . CW 51-900-1002-SKY