Upon my arrival in Red Rock I spoke with the customer about their concerns with the system having a rattling noise. When I turned the system on I was not hearing any noise coming from the system. I pulled the air movement system and found that one of the screws had fallen out due to rust. I rescued what I believe could have been making the noise and also removed pieces of rust from the air movement system. I spoke with the customer about the significant amount of rust and they have agreed to move forward with replacing the blower wheel, squirrel cage and the mounting system. I will have to get parts orders for this repair and a return schedule. Customer put 10% down today for the repair.