What was found
DURING C-CHECK INSPECTION IN YYC, MAINTENANCE FOUND PAX SEAT BACK SUPPORTS CRACKED ON SEATS 6B, 7B, 8B, 11A, B, 14A, B, 9F, 10F, 12F & 13A. MAINTENANCE REPLACED AFFECTED SEATS, REPAIRED IAW EO A25039, OR REPLACED WITH SERVICABLE. AIRCRAFT WAS RETURNED TO SERVICE 11/08/04.