GAS TURBINE ENGINES MAJOR OVERHAUL
ELABORATION OF TECHNICAL ENQUIRY FOR MAJOR OVERHAUL ACITIVIES PLAN
Micrometric measurements
Assembly operations
Hot section assys and parts repair activities
Defects finding (ranking of actual technical condition)
Cleaning and washing methods
TECHNOLOGY PROCESS FOR COMPRESSOR ROTOR REPAIR
Check of radial and axial runouts of surfaces
Micrometric measurements of dicks’ “pine”- and “dovetail” shaped grooves
Restoration of labyrinth seals geometry
Blades set layout in order of static moments growth, Balancing
Refurbishment of guide vanes
TECHNOLOGY PROCESS FOR COMPRESSOR STATOR MAINTENANCE
Restoration of protective coatings
Repair of horizontal and vertical flanged joints
Replacement and grinding of honeycomb seals
Checking the flow characteristics and tightness of the oil and air systems of the support assy
Restoration of the surface of the babbit pads, followed by boring to ensure the clearances
REPAIRS OF BEARINGS AND SUPPORT ASSYS OF GAS TURBINE ENGINES
Restoration of the stator labyrinth cascades and cleaning of the air seal system of the support assy
Restoration of the rotor labyrinth ridges to prevent oil from being ejected into the turbine blow path
GAS TURBINE AND GT AUXILLIARIES CONTROL SYSTEM AND INSTRUMENTATION SERVICING
Calibration the instrumentation sensors
Setting up of the instrumentation sensors
Verification of the instrumentation sensors
