What was found
*MAIN AVIONICS DOOR SURROUNDING STRUCTURE HAS A CORRODED INTERCOSTAL @STRG 27L BETWEEN FS349.00 & FS364.00 (C-CHECK RO 11-27-21) REMOVED & INSTALLED NEW 27L INTERCOSTAL, P/N SH670-32075-3 BETWEEN FS349 - FS364. REF: DWG SH670-32050, REV: J, CRJ700 SRM 51-42-06-001-001-A01, CRJ700 SRM 51-42-21-001-001-A01.COMPLIED WITH 51-900-1002-SKY, LEAK CHECK GOOD