The generator matrix

 1  0  1  1  1  1  1  1  6  1  0  1 2X  1  1  1  1  1  1 X+3  1  1 2X X+6 X+3  1  1  1  1
 0  1  1  8  6  5  0  7  1  8  1 2X+7  1  1 2X 2X+8 X+6 2X+5 X+8  1 X+1 2X+3  1  1  1 2X+8 X+6 2X+3 X+5
 0  0 2X  3 X+3 X+6 2X+3 2X+6  X 2X+3 2X+3  6  0  X 2X+6 2X+3 X+6  X  X X+6 2X+3 X+6 2X+3 2X  3  0 X+3  6 2X

generates a code of length 29 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+508x^54+882x^55+396x^56+936x^57+1152x^58+504x^59+1116x^60+882x^61+72x^62+56x^63+36x^66+18x^69+2x^72

The gray image is a code over GF(3) with n=261, k=8 and d=162.
This code was found by Heurico 1.16 in 91.8 seconds.