The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  9  0  0  0  0  0  0  0  0  9  9  9  9 18 18 18  9 18  0 18
 0  0  9  0  0  0  0  0  9  9 18 18  9 18  0 18  0 18 18  0  0
 0  0  0  9  0  0  0  9 18 18 18  9  9 18  0  0 18  0  9 18  0
 0  0  0  0  9  0  0 18 18  9  9  0  9  9  9  0 18  9  9 18  9
 0  0  0  0  0  9  0 18  9 18  9 18  0  0 18  9 18 18  9  9 18
 0  0  0  0  0  0  9  9  0  9  0  9 18 18  9  0  0 18 18 18  0

generates a code of length 21 over Z27 who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+126x^30+222x^33+214x^36+294x^39+17856x^42+396x^45+330x^48+162x^51+62x^54+6x^57+12x^60+2x^63

The gray image is a code over GF(3) with n=189, k=9 and d=90.
This code was found by Heurico 1.16 in 20.8 seconds.