Shell script to find maximum number line

Hello all,

I am not very much familiar in shell scripts but to some extent I can write.

I have a final output of file and if the value Retur code is more than "0" the final out file should have that row.

The actual file looks as follows:
file1.temp
Number RC
TTT7670 0
TTT8769 4
TTT9987 7
TTT1766 0
TTT8888 0


Now I need the file.output as only RC > 0 entries as follows:

TTT8769 4
TTT9987 7

Please help, i have tried for loop and it reads every field and i am unable to pass the required entries. Please help.

Thank you