Part catalog
Repetitive Detailed inspection for cracks on the left and right wing front spar lower chord and insp OPEN CSN Detailed Inspections IAW Boeing ASB threshold x 50000 CSN 20522 After initial inspection, Repeat Inspections must be performed every 5000 Cy.
Catalog data is source-backed reference information. It does not establish availability, repair capability, certification, traceability, ownership, or airworthiness.