C-172 LINE ASSY 1700121-100. The Fuel Primer line were inspected and pressure tested. Leaks and major corrosion was found on the primer line. Corrective action was taken at sights of leaks. Fittings were salvaged and the corroded tube was removed and replaced. Material Used: Stainless Steel .125" Tube Heat#YX1407-586. Aircraft#N226JA P.O #9422. The repair method and techniques as well as all materials utilized in the performance of such repair are in accordance and approved under AC 43.13-1b.