The alternator

[Besoeker]

I don't see that the OP ever asked for brainstorming about the cause of the failure, he just posted some neat pictures.

That's exactly right.
It affects me only to the extent that the timing for commissioning my bit of kit is now somewhat indeterminate.

 

[Besoeker]

I am wondering why the operator proceeded starting the unit without listening for rubs during barring gear operation. In my younger years, I had the chance of reviving a 15MW, single-shaft, 3600rpm gas turbine and we made sure all the bases were covered before we started the unit: lube flushing, combustor draining, air filter replacement, bearing oil pump/ emergency bearing oil pump/ shaft lifter pump testing, etc.

Your pictures also looks to me like a lot of sand caused fouling on the compressor side.

Given the location, the desert, sand could very well have been at least a factor.

 

[Sahib]

I don't see that the OP ever asked for brainstorming about the cause of the failure, he just posted some neat pictures.

The trend of discussion points but to that.