Jt8 Engine 1

LINE & BASE MAINTENANCE TRAINING (Part 1)

By Ccoyure Tito

CONTENIDO

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.

Power plant. Engine Construction. Bearings and Seals. Borescoping. Performance. Engine Thrust. Fuel System. Ignition System. Oil System. Antisurge Bleed System. Anti-icing System. Indicating System. Ground operations. Troubleshooting.

1

POWER PLANT.- Nacelle

Typical Nacelle Configuration 1

POWER PLANT.- Nacelle

Typical Nacelle Configuration 2

Rear View Nacelle Configuration

History of JT8D Engine

JT8D Turbofan Engine Cutaway View

Power Plant Review Questions

Designation of JT8D Engine

Definition of Turbofan Engine

2

ENGINE CONSTRUCTION REQUERIMIENTOS GENERALES

• Las aeronaves requieren empuje para producir suficiente velocidad para que las alas proporcionen sustentación y superen el peso de la aeronave. • Esta fuerza propulsiva proviene de un tipo adecuado de motor térmico de aviación.

Engine Dimensions

Directional References

Directional References

Major JT8D Design Features

Engine Stations

Engine Flanges

Engine Stations and Flanges

Bearing Locations

Engine Left Side View

Engine Right Side View

Center Engine (Left Side)

Center Engine (Right Side)

Build Groups

Build Groups and Sections

Build Groups and Sections Locations

Front Accessory Drive Group

Fan Inlet Group

Fan Inlet Group

(to FCU)

(to PRBC)

Fan Inlet Group

(to EPR)

Front Compressor Group

Front Compressor Group

Compressor Intermediate Group

Compressor Intermediate Group

Rear Compressor Group

Rear Compressor Group

Diffuser Group

Diffuser Group

Diffuser Outer Fan Duct Group

Diffuser Outer Fan Duct Group

Fan Discharge Section

Fan Discharge Section

Combustion and Nº 5 Bearing Section

Combustion and Nº 5 Bearing Section

Combustion Chambers

Turbine Nozzle Group

Turbine Nozzle Group

Combustion Chamber Outlet

Turbine Nozzle Group

Turbine Nozzle Group - Vanes

Rear Compressor Drive Turbine Group

Rear Compressor Drive Turbine Group

Front Compressor Drive Turbine Group

Front Compressor Drive Turbine Group

Exhaust Case Group

Exhaust Case Group

Exhaust Mixer

Exhaust Mixer

Accessory Gearbox Group

Accessory Gearbox Front

Accessory Gearbox Group

Accessory Gearbox Rear

Airflows

“S” Duct for Engine Nº 2

Airflows

Reviews Questions

Reviews Questions

3

BEARING & SEALS MAIN BEARINGS

Typical Antifriction Bearings

Bearing Locations

Main Bearing Seals

Main Bearing Seals

Carbon Seals

Typical Carbon Seals

Typical Carbon and Labyrinth Seals

Review Questions

4

BORESCOPING

Typical Borescopes

Borescope Access Ports

Review Questions

5

PERFORMANCE

Performance Data

Engine Thrust

Engine Thrust

Engine Rating

Flat Rating Concept

Compressor Performance

Compressor Map Development

Compressor Performance

Rear Compressor Map

Compressor Performance

Front Compressor Map

Troubleshooting Chart

Review Questions

Review Questions

Typical Operating Performance Data

LINE & BASE MAINTENANCE TRAINING Finish Part 1