Performs a variety of diagnostic and mechanical duties on one or more jet, turboprop, and piston multi-engine aircraft models involving diagnosis of malfunctions and required disassembly, rework, repair, replacement, reassembly or adjustment of various aircraft systems to prepare aircraft mechanically for flight and delivery to customer. Repairs or replaces engine components and accessory items such as carburetors, fuel control units, fuel injection system, air bleed system, oil and fuel pumps, starter/generators, and hydraulic and vacuum pumps.