Nkosi
I think it was TBH that was in the Central Australian livery however I think you will find the "genetalia" appeared on DC9-30 TJL.
TJL was on the TN555/556 circuit from MEL to PER up over the top and via everywhere when it cacked itself in PHE and was on the ground an extended time due to Engineering sending turbine that was also U/S out on an F27.
While they waited for the 2nd replacement boredom obviously set in.
Funny thing is it wasn't picked up by management for a week!!
Best all
EWL