Engine Profile

Model: GE90-94B / GE90-115B

Primary Aircraft: Boeing 777-200, Boeing 777-200LR, Boeing 777-300, Boeing 777-300ER and other Boeing 777 wide-body aircraft

Maintenance Cycle: Transit Inspection, Daily Inspection, Line Maintenance Checks, Engine Condition Monitoring, Fan Blade Inspection, Oil System Monitoring, Borescope Inspection, Compressor and Turbine Module Inspection, Engine Performance Analysis, Engine Removal & Installation, Scheduled Engine Shop Visit

Key Focus: Fan system condition, compressor and turbine module integrity, high-pressure turbine (HPT) and low-pressure turbine (LPT) inspection, bearing and lubrication system reliability, vibration and temperature monitoring, engine performance trend analysis, foreign object damage (FOD) prevention, corrosion and contamination control, component alignment accuracy, and overall engine operational reliability.

1. Engine Condition Monitoring & General Inspection

GE90 maintenance begins with engine health monitoring and operational data evaluation. Maintenance teams analyze engine performance parameters to determine whether the engine is operating within expected limits.

Typical inspection items include:

• Engine vibration monitoring 
• Exhaust Gas Temperature (EGT) trend analysis 
• N1/N2 speed monitoring 
• Fuel flow analysis 
• Oil pressure and temperature monitoring 

Common tools used in this stage include:

Engine Diagnostic Equipment

Used for:

• Performance data collection 
• Fault detection 
• Trend monitoring 

Precision Measurement Tools

Used for:

• Clearance measurement 
• Component wear inspection 
• Dimensional verification 

Typical GE90 maintenance tooling includes:

• GE90 Engine Diagnostic Test Equipment 
• GE90 Engine Data Monitoring Equipment 
• Precision Measurement Gauges 
• Torque Wrenches and Torque Adapters 

2. Fan Module Inspection & Maintenance

The GE90 fan module is one of the largest and most critical components of the engine. Due to the large fan diameter and composite fan blade structure, detailed inspections are required during maintenance.

Main inspection tasks include:

• Fan blade visual inspection 
• Leading-edge damage inspection 
• FOD inspection 
• Fan rotor condition assessment 
• Fan case inspection 

Common GE90 fan maintenance tools include:

Fan Blade Inspection Tools

Used for:

• Blade surface inspection 
• Damage measurement 
• Dimensional checking 

Fan Blade Removal / Installation Tools

Used for:

• Fan blade replacement 
• Controlled component removal 

Fan Rotor Support Fixtures

Used for:

• Rotor positioning 
• Safe handling during maintenance 

Typical tooling examples:

• GE90 Fan Blade Removal Tool 
• GE90 Fan Blade Inspection Gauge 
• GE90 Fan Rotor Handling Fixture 
• GE90 Fan Module Maintenance Stand 

3. Compressor Module Maintenance

The GE90 compressor section consists of multiple stages and requires precise inspection to maintain aerodynamic performance.

Maintenance activities include:

• Compressor blade inspection 
• Stator vane inspection 
• Compressor case inspection 
• Rotor and stator assembly checks 
• Clearance measurement 

Common compressor maintenance tools include:

Compressor Case Handling Fixture

Used for:

• Compressor case removal 
• Component lifting 
• Safe positioning 

Compressor Rotor Support Equipment

Used for:

• Rotor assembly 
• Component alignment 

Compressor Inspection Gauges

Used for:

• Blade clearance measurement 
• Dimensional inspection 

Typical GE90 compressor tooling:

• GE90 HPC Stator Case Lifting Fixture 
• GE90 Compressor Rotor Assembly Fixture 
• GE90 Compressor Alignment Tool 
• GE90 Compressor Inspection Gauge Set 

4. Turbine Module Inspection & Overhaul Maintenance

The turbine section operates under extreme temperatures and requires detailed inspection during scheduled maintenance.

Maintenance focuses on:

High Pressure Turbine (HPT)

Inspection includes:

• Turbine blade condition 
• Thermal damage evaluation 
• Cooling hole inspection 
• Blade tip clearance measurement 

Low Pressure Turbine (LPT)

Inspection includes:

• Rotor and stator condition 
• Nozzle inspection 
• Alignment verification 

Common turbine maintenance tooling:

Turbine Rotor Fixtures

Used for:

• Rotor positioning 
• Assembly and disassembly 

Turbine Alignment Tools

Used for:

• Shaft alignment verification 
• Module assembly accuracy 

Turbine Case Handling Fixtures

Used for:

• Heavy component lifting 
• Safe transportation 

Typical GE90 turbine tooling:

• GE90 HPT Rotor Handling Fixture 
• GE90 LPT Rotor/Stator Assembly Fixture 
• GE90 Turbine Alignment Fixture 
• GE90 Turbine Case Lifting Equipment 

5. Bearing, Oil System & Internal Inspection

The GE90 lubrication system plays an important role in protecting rotating components and maintaining engine reliability.

Maintenance tasks include:

• Oil quantity inspection 
• Oil filter inspection 
• Magnetic chip detector inspection 
• Bearing condition monitoring 
• Lubrication system testing 

Common tools include:

Bearing Maintenance Tools

Used for:

• Bearing removal 
• Bearing installation 
• Bearing positioning 

Oil System Inspection Equipment

Used for:

• Oil system testing 
• Contamination detection 

Borescope Inspection Equipment

Used for inspecting:

• Compressor blades 
• Combustor section 
• HPT blades 
• LPT blades 

Typical GE90 inspection tooling:

• GE90 Bearing Installation Tool 
• GE90 Bearing Removal Tool 
• GE90 Magnetic Chip Detector Inspection Tool 
• GE90 Borescope Inspection Equipment 

6. Engine Removal, Installation & Handling Support

For major maintenance events, GE90 engines require dedicated ground support equipment for safe handling.

Maintenance operations include:

• Engine removal from aircraft 
• Engine transportation 
• Engine storage 
• Engine positioning during overhaul 

Common GE90 handling equipment includes:

Engine Sling

Used for:

• Engine lifting 
• Aircraft installation and removal 

Engine Transport Stand

Used for:

• Engine movement 
• Workshop transportation 

Engine Cradle

Used for:

• Engine storage 
• Maintenance support 

Typical GE90 handling equipment:

• GE90 Engine Removal/Installation Sling 
• GE90 Engine Transport Stand 
• GE90 Engine Maintenance Cradle 
• GE90 Engine Rotating Stand

Conclusion

The GE90 engine represents one of the most advanced commercial turbofan engines in aviation history. Maintaining its performance and reliability requires comprehensive inspection procedures, experienced maintenance teams, and specialized tooling designed for each maintenance task.

From fan blade inspection and compressor maintenance to turbine overhaul and engine handling, GE90 maintenance relies on precision-engineered equipment to ensure safe and efficient operations.

Junxun provides professional aircraft maintenance tooling solutions, including engine maintenance fixtures, handling equipment, inspection tools, and customized aviation tooling solutions to support global MRO operations.

Need Aviation Maintenance Tools or Ground Support Equipment?

Shanghai Junxun Aviation Technology provides professional aviation maintenance tools, engine maintenance tooling, Ground Support Equipment (GSE), aircraft maintenance docking systems, customized tooling solutions, and tooling rental services for commercial aircraft MRO operations worldwide.

Aircraft Coverage

Our tooling solutions support a wide range of Boeing and Airbus commercial aircraft, including :

Boeing
• Boeing 737 MAX
• Boeing 737 Next Generation (737NG)
• Boeing 757
• Boeing 767
• Boeing 777
• Boeing 787 Dreamliner
• Boeing 747

Airbus
• Airbus A220
• Airbus A320 Family
• Airbus A320neo Family
• Airbus A330
• Airbus A350
• Airbus A380

Engine Coverage

We also provide engine maintenance tools for leading commercial aircraft engine programs, including 

CFM International
• CFM56-3/5/7
• LEAP-1A
• LEAP-1B
• LEAP-1C

GE Aerospace
• CF6-80C2
• GE90-94B
• GE90-115B
• GEnx

International Aero Engines (IAE)
• V2500

Pratt & Whitney
• PW1100G
• PW1400G
• PW2000
• PW4000

Rolls-Royce
• Trent 500
• Trent 700
• Trent 7000
• Trent XWB

Whether you need standard aviation maintenance tooling, custom-designed equipment, GSE, aircraft maintenance platforms, or tooling rental services, our engineering team is ready to provide reliable, cost-effective solutions tailored to your maintenance requirements.

Can't find the tool you're looking for? Simply send us the aircraft model, engine type, or OEM part number (P/N), and we'll recommend the right tooling solution for your maintenance application.