Skill Level 1 Removes and installs aircraft subsystem assemblies such as engines, rotors, gearboxes, transmissions, mechanical flight controls, and their components. Services and lubricates aircraft and subsystems. Prepares aircraft for inspections and maintenance checks. Performs scheduled inspections and assists in performing special inspections. Performs limited maintenance operational checks and assists in diagnosing and troubleshooting aircraft subsystems using special tools and equipment as required. Uses and performs operator maintenance on tools, special tools, and aircraft ground support equipment. Prepares forms and records related to aircraft maintenance. Performs air crewmember duties.

Skill Level 2 Performs duties in previous skill level and provides technical guidance to subordinate personnel. Performs operational checks and scheduled inspections. Diagnoses and troubleshoots malfunctions in aircraft subsystems.

Skill Level 3 Supervises and provides technical guidance to subordinate soldiers performing aircraft and subsystem maintenance and evaluates the technical training program. 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 airplane maintenance operations. Plans, conducts, and supervises airplane technical inspections. Computes basic weight and balance records. Participates in maintenance test flights. Ensures compliance with aircraft configuration control, Army Oil Analysis Program, and test measuring diagnostic calibration.

Skill Level 4 Determines requirements and supervises maintenance activities. Determines man-hours, personnel, and parts requirements to repair helicopters and associated equipment. Coordinates work requirements, assigns duties, and instructs subordinates in helicopter repair work techniques and procedures according to directives, technical manuals, work standards, and operational policies. Supervises and applies production control, quality control, and other maintenance management principles and procedures to aircraft maintenance. Advises and guides personnel in diagnosing complex malfunctions. Maintains supply economy and discipline. Supervises the helicopter technical training program. Prepares evaluations, special reports, and records pertaining to helicopter maintenance repair and related activities. Supervises and controls the flow of work orders, requisitions, recurring reports, and correspondence. Assists and administers plans and policies. Recommends maintenance facilities requirements. Plans and lays out helicopter maintenance areas, component repair shops, and facilities.