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. 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. 14 CFR 43.9 Return to Service. Certifies that unless otherwise specified in Block 13, the work identified in Block 12 and described in Block 13 was accomplished in accordance with Title 14, Code of Federal Regulations, part 43 and in respect to that work, the items are approved for return to service.