The generator matrix

 1  0  1  1  1  1  1 2X^2+X  1  1  1 2X  1  1  1  0  1  1  1  1  1  1 2X^2+X 2X  1  1  1  1  1
 0  1 2X^2+2X+1  2 X+1 2X^2+X 2X^2+X+2  1 2X 2X^2+1 2X+2  1 2X^2+2X+1  0  2  1 2X^2+X 2X X+1 2X^2+1 2X^2+X+2 2X+2  1  1 X^2 X^2 X^2+X X^2+X  0
 0  0 2X^2  0 X^2 2X^2 X^2 X^2  0 2X^2  0  0 X^2 2X^2 X^2 X^2  0 2X^2 2X^2 X^2  0 X^2  0 X^2 X^2 2X^2  0 X^2  0

generates a code of length 29 over Z3[X]/(X^3) who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+252x^54+90x^56+792x^57+162x^58+36x^59+768x^60+36x^62+42x^63+6x^69+2x^81

The gray image is a linear code over GF(3) with n=261, k=7 and d=162.
This code was found by Heurico 1.16 in 0.0105 seconds.