Borescope Inspection Report Centaur 40 CED Fletcher HG85D93... · 2021. 3. 2. · Centaur 40 CED...

Borescope Inspection Report Centaur 40 CED

Rev A - 01/24/13

Caterpillar Confidential: Green 160309 Fletcher HG85D93 Borescope Report Author : CS-TSTS Owner: CS-TS Manager of 13

Country Customer Name Site Name

USA US Oil Sands Bonanza

Specific Reports Task Risk Assessment CSA/Invoice/Work Order Numbers

Borescope Inspection YES

Borescope Completed By Borescope Date

PD Number

Customer Tag

Report Date

Edan Fletcher 3/9/16 40601 East 3/9/16

Package Engine

S/N Hours Starts S/N Hours

Starts Next

Overhaul Gas Liquid Total

HG85D93 N/A N/A N/A - N/A N/A N/A

Borescope Completed: Before After Offline Compressor Wash


Rev A - 01/24/13


F

E

A

Air inlet Silencer

Air Inlet Duct Air Inlet Screen IGV

1st Stage Compressor Blades 2nd Stage Compressor VGV

D

B

C

Fuel Injector

Injectors Combustor Interior Torch Tube

1st Stage Turbine Nozzle 1st Stage Turbine Blades

Thermocouple Ports 2nd Stage Blages 3rd Stage Nozzle

3rd Stage Blades

Exhaust Collector 3rd Stage Blades

T2 Ports Compressor Exit GV

11th Stage Compressor Blades

RGB

Inspection Port Pinion & Star Gear Star

Gear 2nd stage Accessory Gear Low Speed Brg

VGV External Variable Guide Vanes

IGV 1st Stage VGV 2nd Stage VGV

External Exhaust Diffuser Diffuser


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Access location

Picture Description Inspection for Severity

Air inlet

A

Silencer Air Inlet Screen

a) Oxidation. Affected area

None

Air inlet

A

Air Inlet duct

a) Potential FOD. None

b) Corrosive Pitting.

None

c) Cracks. None

d) Excessive fouling.

None

The Field Service Representative is free to insert any additional pictures he/she deems necessary for the report.


Rev A - 01/24/13


Access location


Air inlet

A

Inlet Guide Vanes a) Nicks and dents. Quantity and size.

None

b) Excess of fouling.

None

c) Corrosive pitting. Affected area.

None

Air inlet

A

1st Stage Compressor Blades

a) Nicks and dents. Quantity and size.

None

b) Excessive fouling.

None


None

d) Tip rub. Gap width and metal curling.

None


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Air inlet

A

2nd stage Compressor VGV a) Nicks and

dents. Quantity and size.

None


None


None



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Access location


Fuel Injector

C

11th Stage Compressor Blades

a) Nicks and dents. Quantity and size.

None


None


None

d) Tip rub. Gap width and metal curling.

None

Fuel

Injector

C

Compressor Exit GV a) Nicks and dents. Quantity and size.

None


None


None



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Access location


Fuel Injector

C

Injectors a) Pilot Centerbody erosion.

None

b) Fuel hole contamination or blockage.

None

c) Cracks. Quantity and size

None

d) Liquid only: broken main fuel spokes

None

Fuel Injector

C

Combustor interior a) Cracks. Quantity and size.

None

b) Thermal Erosion.

None

c) Hot spots. None

d) Buckling or warpage.

None



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Access location


Fuel Injector

C

1st Stage Turbine Nozzle: - Leading edge - Airfoil surface - Trailing edge

a) Cracks. Quantity, length, and orientation.

None

b) Thermal erosion. Depth and affected area.

None

c) F.O.D. Affected area.

None

Fuel Injector

C

1st Stage Turbine Blades: - Leading edge - Airfoil surface - Trailing edge - Blade Tip - Staking Pins


None

b) Thermal erosion. Depth

and affected area.

None


None

d) Tip rub. Gap width.

Some. Along the length of the blade.

e) Pins Oxidation None



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Access location


T5 Probe

D

2nd Stage Turbine Blades: - Leading edge - Airfoil surface - Trailing edge - Blade Tip - Staking Pins


None


None


None


Some along the length of the blade

e) Pins Oxidation

None

T5 Probe

D

3rd Stage Turbine Nozzle: - Leading edge - Airfoil surface - Trailing edge


None

b) Cracks. None

c) Thermal erosion. Depth and affected area.

None


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T5 Probe

D

3rd Stage Turbine Blades: - Leading edge - Airfoil surface

- Trailing edge - Blade Tip


None


Some white residue build up on blade


None


None



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Access location


Inspection Port

RGB

Pinion Double Helical & Star Gear

a) Gear wear. None

b) Teeth Cracks. None

Inspection Port

RGB

Star Gear 2nd Stage – Ring Gear

a) Gear wear. None


Inspection Port

RGB

Accessory Gear

a) Gear wear. None



Rev A - 01/24/13


Access location


Inspection Port

RGB

Low Speed Bearing

a) Wear.

None



Rev A - 01/24/13


Summary of Findings/Conclusion: The compressor section looked clean. The hot section looked in good condition, but the turbine blades showed signs of tip rub on all stages. The RGB looked in good condition.

Recommendation: Not knowing the engine hours poses a risk for the integrity of the internal components. Obtain the engine running hours and speak with engineering for further instruction to move forward.

3/9/2016

Solar Turbines Field Employee Signature / Date

Customer Signature / Date

Customer Name

Borescope Inspection of Gas Turbine Engine – General Review The gas turbine borescope inspection is an internal inspection performed by a trained specialist who assesses the condition of the gas turbine from the air inlet through to the exhaust, using an instrument specifically designed to examine the gas path via the access ports positioned along the engine. These inspections are one of the primary diagnostic methods for maintaining turbo-machinery. Both rigid and flexible fiberscopes are used in conjunction with especially formed guide tubes to inspect the internal stationary and rotating components and to detect early signs of wear or impending failure. The major benefits of the inspection include equipment condition awareness and effective scheduling of any necessary maintenance interventions. In addition, greater reliability / longevity can be achieved through internal inspections, as well as reducing the potential of severe equipment damage. The operating gas turbine engine by design is exposed to high temperatures and rotates at high speeds. Internal inspections are thus necessary to determine if wear or thermal erosion is evident. In addition, these inspections will quantify if any foreign object damage (FOD) or corrosion has occurred, as well as assessing internal components for thermal deterioration, cracking or distortion. Though every effort is made to examine all accessible parts of the engine, there are parts of the engine that are not accessible to a borescope inspection. Therefore, a borescope inspection should not be considered to be an exhaustive evaluation of an engine’s health. For example, corrosion of the under platform portion of a turbine blade cannot be seen in a borescope inspection. Thus, just because it was not seen in a borescope inspection doesn’t mean it cannot exist.

Borescope Inspection Report Centaur 40 CED Fletcher HG85D93... · 2021. 3. 2. · Centaur 40 CED...

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