Each PT6A-60A engine assembly is attached to the firewall on each side of a King Air by utilizing the Engine Truss Assembly. The Engine Truss is bolted to the firewall at four attachment points using bolt P/N NAS146-31 along with 2 washer P/Ns MS20002C6 and AN960-616L. The truss is connected to the engine with four isolator mounts, P/N 114-389031-17, to keep the engine safely in place. Part number 101-910122-51 can be used on King Air 300 aircraft models in the FA001-FA152 serial number range. Corrosion, chaffing, bent tubes, and cracking are common problems that can arise. Aside from corrosion beyond limitations, our on-site repair station (Aircraft & Components Technical Services) has an approved repair process to resolve these issues.