1. Removes, installs, certifies, repairs, modifies, overhauls, and installs turboprop engines, reduction gear boxes, turbine modules, compressor modules, auxiliary power units, propellers and related propeller components as required. Performs maintenance on all propulsion systems including troubleshooting and diagnosing defects, certifying, conducting bench checks, performing in-shop and on-equipment repairs and overhauls. Diagnoses malfunctions using computerized test equipment, schematic diagrams, technical publications and performs the appropriate repair according to the test results and analysis. Determines the extent of disassembly necessary to repair, overhaul, replace and certify all engine, propeller and auxiliary power unit parts. Cleans and inspects engine and propeller component parts such as turbines, gearboxes, blades, gears, bearings, etc. Assembles engines, propellers and auxiliary power units, adhering to prescribed procedures, torque values, safety methods and clearances. Troubleshoots propellers using electric and hydraulic test stands to check for proper operation and evidence of oil leakage. Operationally checks engines and propeller assemblies and auxiliary power units, by using the engine test cell facility to meet all full power run checks on the engine and propeller assemblies and auxiliary power units.
2. Modifies engines, propellers, auxiliary power units, and components in accordance with Time Compliance Technical Orders (TCTO) directives; removes and installs engine quick change kits; prepares engines for installation and installs engine and propeller assemblies on aircraft. Evaluates technical problems of repair, overhaul, modification and installation of aircraft propulsion systems. Solves all types of maintenance problems and performs bench checks and test engine and propeller assemblies for serviceability.
3. Performs operational checks of installed propellers, engines, auxiliary power units and sub-systems during aircraft maintenance ground runs in accordance with approved checklists. Employs test equipment such as computer borescope, fuel pressure gauges, air pressure gauges, and alignment fixtures. Utilizes special tools and precision measuring equipment, high-pressure hydraulic test equipment, and electronic test equipment.
4. Performs isochronal and special evaluations on engines, propellers and auxiliary power units. Interprets certification findings and determines adequacy of corrective action. Certifies installed and repaired engines for compliance with technical publications. Performs fixed and mobile test stand functions (which may include maintenance of engine test cell facility); installs special test equipment; performs preoperational and post operational checks. Operates engines and propellers and records test data. Operates, certifies, and maintains computerized engine test/trim automated systems (ETTAS) on the engine test cell. Evaluates, identifies and corrects problems on propeller and engine components causing vibration or impending failure using the ETTAS system, and vibration analyzer. Evaluates engine and propeller performance by computing engine torque and specific fuel consumption. Monitors engine RPM and turbine inlet temperatures. Evaluates engine and propeller performance and accepts or rejects the individual components. Removes engine and propeller from test stand and prepares units for aircraft installation or storage. Accomplishes operator maintenance on the aircraft and engine sound suppresser facility, test stands and various pieces of ground equipment, including the auxiliary power unit test cell. Performs dynamic propeller balancing and tests the propeller integrated synchophasing. Tests variable potentiometers, servo-motors, indicators and aircraft wiring.
5. Performs aircraft full power runs and complete engine and propeller efficiency checks. Clears Red X symbol documentation on engine and propeller related components.
6. Prepares man-hour data collection and required forms for input into the Core Automated Maintenance System (CAMS) or the G081 (AFI 22-2101, CAMS for Mobility). Reviews and assists in maintaining Technical Orders (TOs) and other technical publications and directives pertinent to the element.
7. Maintains bench stock, parts, and equipment. Assists the material control function in identifying part numbers and stock numbers for processing and controlling of repair cycle assets.
8. Provides on-the-job training for assigned personnel. Plans and conducts formal classes of instruction in techniques of repair and maintenance of aircraft engine, propeller, auxiliary power unit, and related equipment and in the use of diagrams, blueprints, wiring schematics and technical publications. Evaluates effectiveness of training by observation and through written and oral examinations. Advises supervisor of the experience and skill levels of assigned personnel. Maintains training documentation.