This document provides a summary of a training presentation on the Jet Shop in the Jet Engine Overhaul Complex (JEOC) in New Delhi. It describes the various sections and departments in the Jet Shop and Hydraulic Shop. It also provides details on the V2500 and JT8D jet engines, including their specifications, components, maintenance processes, and differences between the two engines. Schematic diagrams and pictures are included to illustrate the engine components and processes described.

1. TRANING PRESENTATION
ON
JET SHOP
IN
JET ENGINE OVERHAULCOMPLEX
(J.E.O.C)
AT
NEW DELHI
Submitted By –
Gaurav (13/597)
Aero. Engg.(IV Yr.)

2. SCHEDULE OF JET SHOP
SECTIONS DEPARTMENT HEAD
Final assembly JT8D engine Mr. Ashutosh
Final assembly V2500 engine Mr. Ashutosh
View Room Mr. Bandhopadhya
Cleaning Room Mr. Mukhrjee
NDT Mr. Mukhrjee
Standard Room Mr. Bandhopadhya
Machine Shop
Test Cell
Mr. Mukhrjee
Mr. Trilochan

3. SCHEDULE OF HYDRAULIC SHOP
1.BRAKE ASSEMBLY
2.WHEEL ASSEMBLY
3.ESCAPE SLIDE
4.HALL

4. History
Founded by J. R. D. Tata in 1932 i.e. on 15 October 1932 as
Tata Airlines
Tata Airlines became a public limited company on 29 July 1946
under the name Air India.
 On 8 June 1962, the airline's name was officially truncated to
Air India.
 In 1971, the airline took delivery of its first Boeing 747-200B
named Emperor Ashoka.
 In 1994 the airline was registered as Air India Ltd.
 In 2007, the Government of India announced that Air India
would be merged with Indian Airlines.

5. Your Palace in the Sky
IATA ICAO CALLSIGN
AI AIC AIRINDIA
Parent Company AIR INDIA LIMITED
Headquarters Indian Airlines House, New Delhi
Key People Ashwin Lohawani Chairman & MD
Alliance Star Alliance
Subsidiaries • AIR INDIA EXPRESS
• AIR INDIA REGIONAL
Fleet Size 109
Destinations 84
Frequent flyer program Flying returns
INTRODUCTION

6. Primary Hubs – Indira Gandhi International
Airport (Delhi)
Secondary Hubs – Chhatrapati Shivaji International Airport
(Mumbai)
Revenue ₹197.81 billion
Operating income ₹2.171 billion
Net income ₹5.81 billion
Employees 25,285 (August 2016)
Website www.airindia.in

7. Air India
Limited
Air India
Air India
Express
Air India
Regional
Air India
Engineering
Services Ltd.
Air India
Transport
Services Ltd.
Airline Allied
Services Ltd.
Airport
Services Ltd.
Hotel
Corporation of
India Ltd.
Air India
Charters Ltd.
Structure

8. Aircraft In Service Total Passengers
Airbus A319-100 22 144
Airbus A320-200 26 168
Airbus A320neo - 162
Airbus A321-200 20 182
Boeing 747-400 5 423
Boeing 777-200LR 3 238
Boeing 777-300ER 12 342
Boeing 787-8 21 256

9. Awards and recognitions
 Preferred International Airline for travel and hospitality from Awaz
Consumer Awards (2006)
 Best Corporate Social Responsibility Initiative by Galileo Express Travel
World
 Best Short-Haul International Airline by Galileo Express Travel World
 Amity Corporate Excellence Award by Amity University
 Reader's Digest Trusted Brand
 Dun and Bradstreet Award (D&B), first in terms of revenue out of the top
airline companies out of India
 Best South Asian Airline, Mice and business travel publications
 Cargo Airline of the Year, 26th Cargo Airline of the Year Awards
 The Montreal Protocol Public Awareness Award by the United Nations for
environmental protection[
Air India was named India's most trusted airline by The Brand Trust Report
2015.
 Air India was chosen as India's Most Reputed Airline in a consumer and
media research in July 2016 by Bluebytes News and TRA Research
 Air India's ground services became the first ground service provider to
acquire ISO 9002 certification on 31 January 2001.

10. ON DEPENDING ON AIRCRAFT PARTS, AIR INDIA
LIMITED IS DIVIDED IN FOLLOWING 2 SECTIONS
1. ACCESSORIES/HYDRAULICS SHOP:
1) Wheel Shop
2) Brake shop
3) Escape Slide
4) Miscellaneous Topics(Hall)
5) Test Rig
2. JET ENGINE OVERHAUL COMPLEX:
1) Fitting/Welding
2) Mechanical Cleaning/Painting
3) View Room/Blade/NDT
4) Sub Assembly/Gear Box
5) Final Assembly
6) Test Cell

11. MAINTENANCE IN JEOC
 Maintenance of commercial aircraft engine.(i.e. V2500-A1 ,
JT8D , CFM-56B )
 Maintenance is done in levels.
 QUALITY CONTROL unit decide type of maintenance.
 Maintenance begins from final assembly ,that dissembles
engine.

12. MAINTENANCE LEVELS IN JEOC
L1 :
 Initial stage of maintenance.
 Visual inspection ,vacuum check done
 Minor level of maintenance.
L2 :
 If any defect observed in L1.
 It includes minor repairs , replacement and seals etc.
 Maintenance of only a particular module.
L3 :
 Highest level of maintenance.
 Include 90% of complete overhaul
 In this every part separated and send to sub- assembly.

13. Centers in
JEOC
Engine
Repair
Centre
Receiving
Section
Final
Assembly
View Room
Gear Box
Section
Cleaning
Section
NDT
Standard
Room
Engine Test
centre
Centers in J.E.O.C

14. Description regarding the method of operation of the engine
shop are :
Receiving Section : This section is provided with 2*7.5 tons
hoist for loading /off loading the engine/ equipment.
Final Assembly : Any engine visiting the JEOC for
servicing is taken in this section. The section has been
divided into two sub sections, one for each type of
engine.
Sub Assembly : This section is responsible for activity on
V2500, CFM56-5B engines. There are distinct work bays
to handle V2500-A1, CFM56-5B
 The modules are sent for further processing like cleaning,
NDT, and after inspection. The part and modules are
assembled in this area

15. NDT(Non Destructive Testing) : This section carries out NDT
inspections of the components using following technique.
(a) Eddy Current
(b) Ultrasonic Inspection
(c) FPI/FMPI
View Room : Here the components of the respective engines are
inspected for their serviceability status & sent to NDT section /
repair section / Sub assembly / Final assembly / Stores, as per
inspection results & shop requirements.
Gear Box, Bearing and Seals : Gear box of engines are sent here
for disassembly, inspection, assembly process.
 All bearings and seals are sent for cleaning , inspection &
preservation in this section

16. Cleaning Section : Chemical & Mechanical cleaning of
disassembled parts is undertaken here in accordance
with manufacturer recommended processes &
procedures
1) Mechanical Cleaning
2)Chemical Cleaning
Standard Room : All the master calibration equipment is
placed in this section. The gauges equipment &
tooling used in various sections are calibrated.
Test Facility Cell : It is fully computerized data
acquisition facility & is capable of testing V2500-A1,
JT8D engines.

17. V2500-A1 Engine
 Axial flow
 High by pass ratio
 Twin spool
 Turbo fan Engine
 Designed primarily for 150 seats short to medium range
aircraft
Specification :-
Propulsion Unit Weight 7300lbs (3311 kg)
Fan Tip Diameter 160 cm
Propulsion Unit Overall Length 4940.3 cm
Engine Overall Length 3200 cm
Take Off Thrust 25000 lbs.
Total Airflow 355 kg/sec
By-pass Ratio 5.42 : 1
Overall Pressure Ratio 29.4 :1

18. SCHEMATIC DIAGRAM FOR JET ENGINE

19. V2500-A1 ENGINE MODULES
1. Fan Module
2. Intercase Module
3. High Pressure Compressor
4. Diffuser / Combustor Module
5. High Pressure Turbine
6. Low Pressure Turbine

20. LOW PRESSURE SYSTEM
 Four stage low pressure compressor
 Three primarily stages, driven by a 5 stage axial flow low pressure
turbine
 An annular bleed valve is located at the outlet from the booster stage
HIGH PRESSURE SYSTEM
 10 stage axial flow compressor driven by a 2 stage axial flow high
power turbine
 4 stages of variable stator vanes
 Variable angle inlet guide vanes
GEARBOX
 Radial drive via a tower shaft from high pressure system to fan case
mounted angle & main gearboxes
 Gearbox provides mountings & drive for all engine driven
accessories & the pneumatic stator motor.

21. COMBUSTION SYSTEM
 Annular, two piece with 20 fuel nozzles
Electronic Engine Control (E.E.C)
E.E.C provides a full range of control of :
 Engine fuel flow
 Automatic Engine starting
 Compressor airflow control system
 Heat management system
 Fuel diverter & fuel return to tank valve
 Thrust Reverser

22. JT8D ENGINE
 Axial Flow
 Dual Spool
 The JT8T has a full length annular fan duct.
 Turbofan engine having a 13 stage split compressor,
9 can annular combustion chamber and a split 4-stage
reaction impulse turbine.
 Low by-pass ratio
 Used in Boeing 737
 The engine operates similarly to all turbojet versions
of a gas turbine engine in that it derives its propulsive
force through the application of Newton’s third law for
every action there is an equal and opposite reaction.

23. DIAGRAM OF JT8D ENGINE

24. ENGINE SECTION OF JT8D
The engine has six general sections:
 The front compressor (also called the LPC):
- Has six stages (two fan stages, four primary stages)
- Is driven by the front compressor drive turbine and is
connected to it by a drive shaft (inner).
 The rear compressor (also called the HPC):
- Has seven stages
- - Is driven by the rear compressor drive turbine and is
connected to it by a drive shaft (outer).
 The combustor has :
- Nine fuel nozzles
- Nine can annular combustion chambers.

25. The rear compressor drive turbine (also called the
HPT):
- Has three stages
- Drives the HPC, to which it is connected by a drive
shaft (outer)
The front compressor drive turbine (also called the
LPT):
- Has three stage
- Drives the LPC, to which it is connected by a drive
shaft(inner).
The exhaust section:
Receives LPT discharge air
Receives secondary air from outer duct.

26. DIFFERENCE BETWEEN V2500 & JT8D ENGINES
V2500 JT8D
1. High by-pass ratio with the ratio 5.24:1 Low by-pass ratio with the ratio of 1:1
2. 75% of thrust is attained by Fan 50% of thrust is attained by Fan
3. 10 HPC stages 7 HPC stages
4. 2 stages HPT& 5 Stages LPT Single stage HPT & 3 stages LPT
5. Fuel system is Electronic hydraulic Fuel system is Hydro mechanical
6. 5 types of bearings are used 7 types of bearings are used
7
8.
20 fuel nozzles are required
Thrust produced is 25000 lbs.
9 fuel nozzles are required
Thrust produced is 16000 lbs.

27. REFERENCES
 Training manual issued by AIR INDIA LTD.
 Air India Ltd. Data (FY 2014-15)
 https://en.wikipedia.org/wiki/Air_India_Limited
 Google images
 https://en.wikipedia.org/wiki/Pratt_%26_Whitney_JT8D
 https://en.wikipedia.org/wiki/IAE_V2500
 International Aero Engines - Wikipedia, the free
encyclopedia
https://en.wikipedia.org/wiki/International_Aero_Engines

28. THANK YOU