Jet engine testing close to runway 25?

[Erik H. Bakke]

Sitting in my office at Botany, there's this engine noise coming from the airport.
It's been going on for quite a while, already.

Is there any engine testing being conducted over in that area? The CX 747F, perhaps?

I do hear turboprop tests from time to time, but this is the first time I have heard anything like this in the 10 months I have been working here.

[Nigel C]

A Gulfstream has been doing an engine run and compass swing.

[Erik H. Bakke]

Thanks.

That would certainly explain it. It was noisy enough to sound like a 767.