What was found
PAX DOOR SILL ANGLE IS CORRODED ON IB & OB SIDE NEAR OR AT SEVERAL FASTENER HOLES AND AT LOWER FORWARD FLANGE. AFTER REMOVED ANGLE, MID CAP FROM PAX DOOR SURROUND STRUCTURE FOUND CORRODED MORE THAN 30% OF A MEMBER, PART IS OUT OF LIMITS, IAW CRJ900 SRM 53-21-23-101-001-A02 NOTE 2, REQUIRE REPLACEMENT ANGLE. CORRECTIVE ACTION: INSTALLED NEW ANGLE, MID CAP P/N SH670-31825-9 ON PAX DOOR SURROUND STRUCTURE, IAW CRJ900 SRM 51-41-02-001-001-A01 & 51-42-06-001-001-A01