Skill Level 1 Removes and replaces powertrain quills, transmissions adapting parts, rotary wing hub, and tanks. Disassembles friction dampers and hanger assemblies. Disassembles, repairs, reassembles, adjusts, balances, and aligns powertrain components, systems, and subsystems to include main and tail rotor hub assemblies according to directives. Applies corrosion preventative procedures. Cleans, preserves, and stores powertrain components. Performs nondestructive inspections on aircraft components and related items. Uses and performs operator maintenance on ground support equipment, common, and special tools. Maintains facilities for storage of flammable and hazardous materials. Requisitions and maintains shop and bench stock for repair of aircraft powertrain systems and subsystems. Prepares request for turn-ins and repair parts for powertrain components. Prepares forms and records related to aircraft maintenance.

Skill Level 2 Performs duties described in previous skill level and provides technical guidance to subordinate personnel. Diagnoses and troubleshoots malfunctions in aircraft powertrain components and their subcomponents. Participates in maintenance test flights, as required.

Skill Level 3 Supervises and provides technical guidance to subordinate personnel performing aircraft powertrain system maintenance and nondestructive inspection. Evaluates maintenance operations and facilities for compliance with directives, technical manuals, work standards, safety procedures, and operational policies. Performs maintenance trend analysis and applies production control, quality control, and other maintenance management principles and procedures to aircraft powertrain system maintenance, nondestructive inspection, and shop operations. Instructs personnel and conducts technical training in aircraft powertrain system maintenance, nondestructive inspection, supply, and safety techniques. Evaluates the technical training program. Monitors requisition of parts, tools, and supplies.