how can i remove a Z letter in a string

hi

someone know a function to remove letter Z from 3th clolumn
so , by example, string NF114Z must change to NF114,    NF102Z must change to NF102

01NAEB      NC31      NF114Z            SYSGERMX02      19/12/2012      111400
13IMBC      NC31      NF102Z            SYSGERMX02      19/12/2012      111400
20NAGB      NC31      NF90Z            SYSGERMX02      19/12/2012      111400
21NACA      NC31      NF100Z            SYSGERMX02      19/12/2012      111400
23NADA      NC31      NF116Z            SYSGERMX02      19/12/2012      111400
23NAEB      NC31      NF115Z            SYSGERMX02      19/12/2012      111400
27NAEN      NC31      NF82Z            SYSGERMX02      19/12/2012      111400
29NACA      NC31      NF92Z            SYSGERMX02      19/12/2012      111400
29NAFB      NC31      NF93Z            SYSGERMX02      19/12/2012      111400
31IMBL      NC31      NF103Z            SYSGERMX02      19/12/2012      111400
44NABD      NC31      NF95Z            SYSGERMX02      19/12/2012      111400

thanks a lot
EXPORTNC31.csv