MILITARY GRADES: E-1 through E-5 GENERAL EXPERIENCE: Experience or training that has provided the ability to perform assembly and disassembly operations and make prescribed modifications to aircraft engines, engine assemblies, and accessories in accordance with technical specifications, procedures and requirements. Experience using hand and power tools common to the trade. SPECIALIZED EXPERIENCE: Experience or training performing standard, routine assembly and disassembly operations and making prescribed modifications to aircraft engines, engine assemblies, and accessories. Experience or training performing maintenance overhaul, troubleshooting, testing, and repair of aircraft engines, engine components, and power trains for fixed and/or rotary wing aircraft. Experience determining maintenance needed from work orders, inspection reports, historical record, and by own diagnosis. Knowledge in installing, removing, operating, and repairing a variety of conventional and modified aircraft engines and engine accessories systems on and off the aircraft. Knowledge and understanding of jet engine theory and the integration of the jet engine with all aircraft systems to troubleshoot malfunctions and accomplish repairs. Knowledge and skill to operate a variety of test equipment, such as vibration analyzers, air data simulators, engine monitoring computer, data transfer equipment, dynamic propeller balancing equipment, high pressure hydraulic test equipment, voltmeters and other precision measurement equipment to troubleshoot, maintain, and repair aircraft engines on and off the aircraft. Skill and ability to interpret technical orders, manufacturer's catalogs, blueprints and schematic drawings, to obtain the technical information required to troubleshoot, overhaul, repair, modify, assemble and trim engines. Knowledgeable in understanding and applying technical order data, principles and practices to verify that essential quality requirements have been met, identify problem areas and recommend corrective action. Knowledgeable in understanding and interpreting engine trending data, to determine defects and failure rates on installed engines. Skill and knowledge to certify work in progress (IPIs) and upon completion, compare to required tolerances and specifications as identified in Technical Orders (TO)'s. Knowledge and understanding of mathematics to determine tolerances and performance specifications involved in engine buildup and test cell operations.