What was found
(CAN) DURING REPLACEMENT OF THE NR 1 HYDRAULIC EDP, IT WAS NOTICED THAT THE ECS FUEL DRAIN LINE WAS CHAFED. LT ENGINE ECS FUEL DRAIN LINE, PN CN627-8035-001, AIPC 71-71-03, FIG 5-35, REPLACED. ENGINE, PN CF34-8C5, SN 194345, TSN 15594, CSN 8288, TSR 2303, CSR 1246. ACFT TSN 26092, CSN 13322.