The generator matrix

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

generates a code of length 54 over Z3[X]/(X^2) who´s minimum homogenous weight is 99.

Homogenous weight enumerator: w(x)=1x^0+572x^99+1086x^102+1326x^105+1100x^108+894x^111+750x^114+564x^117+198x^120+48x^123+22x^126

The gray image is a linear code over GF(3) with n=162, k=8 and d=99.
This code was found by Heurico 1.16 in 85.1 seconds.