What was found
L WING ANTI ICE VALVE INOP PERFORMED LH WING ANTI ICE VALVE REMOVAL UP TO AND INCLUDING STEP 2D(3) IAW AMM 30-11-02-004-001. REMOVED AND REPLACED ANTI-ICE VALVE, WING LE DUCT ON L/H IAW AMM 30-11-02-404-012. COMPETED STEPS FROM A UP TO INCLUDED E(13) PARTS USED: 1579681,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1579681 SN OFF 1880 IPC REFERENCE # 30-11-00-01 CONTINUED WITH STEP 3E.14 OF AMM 30-11-02-404-012 UPTO COMPLETION. OPS CHECK GOOD. PREVIOUS TECH MIXED UP SN OFF AND NEW PART. REF PICS. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1579681 SN OFF 1151 VALVE, ANTI-ICE OFF 75-3013-9-9001 1151 ON 75-3013-9-9001 1880