The generator matrix

 1  0  0  1  1  1  1  1  1  X  1  1  X  1  1 2X+6  1  1  1  1 X+3  1  1 X+6  1  1  1  1
 0  1  0  1  6  0  1 X+8 2X+1  1  5 2X+8  1 X+4 2X+4  1 2X+5 2X+6 2X+8 X+3  1  2 2X+4 X+6 2X+8 X+3  5 X+2
 0  0  1  8 2X+7  8  1 X+1  X X+8 2X+6 X+8 2X+1 X+8  6 2X+6 X+1 2X+2 X+6 X+4 2X+7  8  7  1  1 X+2 2X+8 2X+4
 0  0  0 2X  6 2X+3 2X+6 X+6  3  6 X+3 X+6  3  3  X 2X 2X+3 X+3 2X+6 2X X+3  3  6 X+3  0 X+3  X 2X+3

generates a code of length 28 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+510x^48+1386x^49+2376x^50+3972x^51+8472x^52+9882x^53+18176x^54+24372x^55+27486x^56+30606x^57+25080x^58+13770x^59+7020x^60+3120x^61+432x^62+192x^63+234x^64+24x^66+30x^67+6x^69

The gray image is a code over GF(3) with n=252, k=11 and d=144.
This code was found by Heurico 1.16 in 54.6 seconds.