Correction: not a test pilot
As the Orzie newspaper says, the gentleman is not a test pilot but a flying instructor "breaking in" the new / overhauled engine.
It is actually a nice mix of instrument and visual flight. He dialled in a radial back to Adelaide VOR to use as his baseline and then drew the letters visually. As someone else pointed out above, the aircraft (a DA-40) is equipped with a glass cockpit so you can basically see your GPS track. Still, an impressive bit of work and needs quite some concentration not to fuck up.
By my reckoning, the letters are about 20 NM long, so it would have taken him about two and a half hours to write the whole sentence.
Some people update their mood on Farcebook, others have other ways of expressing themselves. I hope his boss appreciates the free publicity, cause he would have never been able to afford a campaign like this.
Biting the hand that feeds IT
