CT501 – (W) 501 Combustion Turbine Generator Maintenance

CT501 – (W) 501 Combustion Turbine Generator Maintenance

4.5 days - 32 PDH Credits Awarded



This 4-½ day course was developed to improve the effectiveness of maintenance activities associated with (W) 501 combustion turbine-generators.   Learn to better plan and implement gas turbine maintenance outages.  Combustion turbine operation is discussed from the perspective of auxiliary systems and how operating factors may impact maintenance intervals.  Combustion, hot gas path and major inspections are discussed. A topical outline includes: Review of CT Fundamentals, 501 Construction and Operating Principles, Auxiliary Systems, Controls Overview, Maintenance Preparation and Planning, Combustion Section Inspection, Turbine Inspection, Major Inspection, Generator Inspection and Alignment. This course has been specifically designed for plant personnel who are involved in safely and effectively operating and maintaining of these (W) 501 combustion turbine generators.


Upon successful completion of this course the participant should be able to:
  1. Describe the major components and systems associated with (W) 501 combustion turbines.
  2. List combustion turbine operational and safety issues that typically cause the scheduling of a maintenance outage.
  3. Describe differences between a hot gas path inspection, turbine inspection, and major inspection.
  4. List the considerations that must be included when developing an outage plan or schedule.
  5. Describe the major considerations when making a replace/reuse/repair decision.
  6. Describe the (W) 501 combustion turbine support systems and requirements for operation.
  7. Describe the procedures necessary for the safe and effective disassembly and reassembly of combustion turbine components.
  8. Describe the disassembly and reassembly of the major fuel valves.
  9. List the most common causes of gas path damage and their possible affects upon future operation.
  10. Describe most common causes gas path defects and their impact upon turbine efficiency and reliability.
  11. Describe the type and purpose of clearance and alignment measurements commonly taken during the disassembly and reassembly of a combustion turbine unit.
  12. Describe the measuring instruments used to determine combustion turbine component clearances.
  13. List and describe the various non-destructive examinations performed during disassembly of the combustion turbine.
  14. Describe the common procedures for cleaning and inspecting combustion turbine components.
  15. Describe the criteria used to evaluate combustion turbine component defects.
  16. Describe the common repair methods for repair of combustion turbine components.
  17. Describe the common types and operation of journal and thrust bearings.
  18. Describe the common causes of bearing damage.
  19. Describe the measurements required to determine oil clearances.
  20. Describe common bearing inspection and repair procedures.
  21. Describe the considerations to be taken into account when evaluating alignment of combustion turbine components.
  22. Describe the methods used to properly align combustion turbine generator components.

Course Dates / Location / Fee

See www.TurbineGeneratorTraining.com for detail on the course dates / locations / and registration fees. HPC’s 3-4-2 policy applies:  Sign up 3 for the same course/date and pay for only 2! For those participants who “Training Savings Program” members, your account balance will be reduced by 60% of the quoted open-enrollment price (yes that is 40% off for paying for volume in advance). HPC Technical Services reserves the right to cancel any course/seminar within 10-working days of the scheduled date.  Fees are 100% refunded or credited to another Seminar (clients' choice) if HPC should cancel any Seminar.  HPC is not responsible for non-refundable airline tickets or other travel expenses under any circumstance.

Course Outline

  1. Gas Turbine Fundamental Review
  2. 501 Combustion Turbine Construction 
    1. Turbine Function
    2. Component Description
  3. Turbine Auxiliary Systems
    1. Lube Oil System
    2. Hydraulic Supply
    3. Cooling and Sealing Air System
    4. Fuel Gas System
    5. Fuel Oil System
    6. Fuel Forwarding System
    7. Atomizing Air System
    8. Starting System
    9. Protection System
  4. Controls & Operation Overview
    1. Control Philosophy
    2. Speed / Load Control
    3. Temperature Control
    4. Alarm & Protection
  5. Maintenance Preparation & Planning
    1. Periodic Inspections
    2. Running Inspections
    3. Combustion Section Inspection
    4. Turbine Inspection
    5. Major Inspection
    6. Documentation
    7. Scheduling
  6. Combustion Section Inspection
    1. Accessibility
    2. Parts Identification
    3. Ignition and Flame Detection
    4. Combustion Components
    5. Borescope Inspection
    6. Reassembly
  7. Turbine Inspection
    1. Accessibility
    2. Turbine Shell Disassembly
    3. Nozzle Disassembly
    4. Inspection
    5. Reassembly
  8. Major Inspection
    1. Accessibility
    2. Disassembly
    3. Bearings
    4. Rotor
    5. Compressor Stator
    6. Reassembly
  9. Generator Inspection
  10. Alignment
    1. Readings
    2. Procedure

Frequently Asked Questions

  • Will HPC Technical Services bring this course to our location for our personnel only?   Will HPC customize the presentation to suit our particular needs?  YES, call or email Stephen Parker, Stephen@TurbineGeneratorTraining.com for a price quotation.
  • Is HPC Technical Services' textbook available for purchase as a reference document?  This text is not yet available for purchase.
  • What is the cost for HPC Technical Service to deliver this course at our location?  Well, of course that can vary, but generally speaking, if you're planning on having 6+ attend, when considering your T&L, it is to your advantage to perform the course at your plant (office).  You gain from the customization and price.
  • Can HPC Technical Services provide "Technical Assistance" in outage planning, implementation or troubleshooting?  Yes we can.  Call or contact Stephen Parker, Stephen@TurbineGeneratorTraining.com for our rate sheets and any further information required.

Combustion Turbine Certification

Those who attend this course are automatically qualified to take HPC Technical Services' Certification Examination.  This examination is offered at no additional expense to the participant.  An 80% passing grade is required.  The examination length will not exceed 2-hours.  Those who complete this examination will receive a revised "certificate of completion" that recognizes this accomplishment along with two-copies of a "To Whom It May Concern" letter that states their accomplishment.  (Two copies are provided, one for the participants' employer and one for the participants' personal file.) Consult HPC's website, www.TurbineGeneratorTraining.com, for detail on HPC gas turbine certification program.

What you will receive

  1. 1 copy of HPC Technical Services' textbook, ((W) 501) Combustion Turbine Operations & Maintenance.
  2. A Certificate of Completion with 31 PDH.


All HPC instructors are educated ‘experts’ on the subjects they teach, with years of relevant hands-on experience (typically 20+ years), and have proven instructional skills. Brief resumes can be looked up on HPC’s website, www.TurbineGeneratorTraining.com.