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Engine / APU Repair & Overhaul Services

History of Engine Overhaul Adventure

The overhauling of the first aircraft piston engines started in 1951. In paralel with the latest developments in the aviation and engine industry, THY is currently capable of overhauling high by-pass and high thrust aircraft engines. Engine Shop is a JAR-145 / EASA Part-145, FAR-145 and Turkish DGCA approved facility.

THY Engine Shop is serving both whole THY fleet and customer engines.

Engine Shop Capability List

THY engine shop is capable of overhauling, repairing and testing engine types below;

With the support of Manufacturing and Repair Shop, Engine Shop is capable of serving the services below for Engines and / or APUs

Assembly / Disassembly

• Modular Removal & Installation
• Module Disassembly & Assembly

• Steam Cleaning
• Dry Abrasive Blast Cleaning
• Wet Abrasive Blast Cleaning
• Alkaline Degrasing / Rust Removing
• Plastic Media Blasting
• Paint Stripping
• Alkaline Descaling
• Light – Duty Alkaline Cleaning of Titanium Parts
• Four Step Alkaline Cleaning and Acidic Descaling
• Heavy Duty Alkaline Cleaning
• Three Step Alkaline Cleaning
• Ultrasonic Cleaning
• Vibratory Cleaning (Sweco)

Surface Treatments

• Glass Bead & Steel Shot Peening

Static & Dynamic Balancing

• 3 Dynamic Schenk Balance Machine
• 2 Static Vertical Schenk Balance Machine

Inspection

• Fluorescent Penetrant / Magnetic Particules
• Visual & Dimensional ( Including 3D – CMM, Surface Plate & Height Gage )
• Surface Roughness Insp.
• Hardness
• Optical Profile Projector
• Bearing Inspection Using Vibration Analyzer, Radial Clearance Check Gage

Harness Overhaul

• Inspection & Repair of Harness of Engine, APU & Landing Gears

Others

• Electro – Chemical Etching
• Dot Peen – Marking
• Lapping of Carbon Seals

Repairs

• Combustion Chamber Full Overhaul
• Honeycomb Repair
• Heat Treatment (1.5 M Dia. X 1.5 M Height)
• Welding
• Brazing
• Plasma Spraying
• Stripping of Coatings
• Electroplating
• Chromating and Phosphating
• Anodizing of Aluminium Parts
• Painting
• Machining, Grinding, EDM, etc.
• Blade & Vane Tiıp Measurement and Grinding

Apu Shop

APU, generally located in the tail section of the airplane, is a turbo-shaft gas turbine which supplies air and electricity to the airplane. Main functions of APU are listed below:

• It functions as a starter for main engines
• It can meet all electricity needs of the airplane by means of a generator installed on APU
• It runs the anti-icing system
• It provides air condition and pressurization of the cabin.

Being established in 1972 as an integral part of Engine Shop, APU Shop has been in service for aviation industry sector for over 30 years.  Starting with minor repairs on GTCP85-98CK of Boeing 727, GTCP85-98D of DC9 and TCSP-700 of DC10 in 1979. The shop became able to perform overhaul and performance tests of APU’s in its capability after building its own Test Cell in 1981. APU shop is an FAA & EASA approved facility and authorized to issue release certificates of both agencies.

APU Shop Capability List

APU shop is capable of overhauling, repairing and testing APU types below:

APU Shop will serve as an “Authorized Repair Station” of Hamilton Sunstrand Corporation.

In addition to the THY fleet, APU Shop has also been serving customers both from Turkey and abroad.

Fuel Components Shop

Fuel component shop is a branch of engine shop and is capable of overhauling and testing the components below which belong to ENGINE, APU and general fuel system;

HMU, MEC, MF PUMP, VSV, VBV, IGV ACTUATOR, FUEL NOZZLE, FCU, BOOSTER PUMP, SHUTOFF VALVE etc.

Engine And Apu Test-Cell Units

Engine and APU Test Cells are used for testing Engines&APUs after maintenance operations before putting them back to service.

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