How To Inspect Inlet Guide Vanes; Inspect Compressor Rotor, Stator Blading, Compressor/Turbine Casings; How To Inspect First Stage Nozzle Support Ring; How To Inspect Inner Compressor Discharge Case Seals - GE MS-6001B Maintenance Instructions Manual

Major Inspection — Inspection Procedures
Operation 3 — How to Inspect Inlet Guide Vanes
1. Inspect the inlet guide vanes carefully for deposits, erosion (thinning of trailing edges and round-
ing of leading and trailing tip corners) or corrosion pitting.
2. Liquid penetrant inspect for cracks in the blade root and vane.
3. Two samples of blade deposit, if any is found, should be collected in a clean glass jar or bottle
and sent to a testing laboratory for analysis. This analysis is important to the overall inspection.
4. Check for oily substances on the inlet guide vanes.
5. Record inspection results on Inspection Form PGS/GT-FF-6108.
Operation 4 — How to Inspect Compressor Rotor, Stator Blading and Compressor and Turbine
Casings
1. Inspect blading for tip bending damage. Some bending damage may be field repaired under su-
pervision of your General Electric Company Field Service Representative.
2. Inspect the air foil surfaces for nicks and dents. Small, shallow dents above the pitch line may
be blended out. Damage below the pitch line is not acceptable and blades must be replaced.
3. Perform liquid penetrant check after working on blading.
4. Check blading for erosion, corrosion, and deposits. Samples of deposits should be collected in
glass containers for analysis. Blading eroded beyond about 20% of root area must be replaced.
5. Liquid penetrant check blade roots and airfoils. Damage to blading which requires replacement
should be performed by an authorized General Electric Company Repair Facility.
6. Inspect all casings for cracks or other physical damage.
7. Record inspection results on Inspection Form PGS/GT-FF-6107.
Note: If inspection of the compressor or turbine indicates a need to remove
the compressor and turbine rotor to inspect the lower half components
it is recommended you contact your General Electric Company Field
Service Representative.
Operation 5 — How to Inspect First Stage Nozzle Support Ring
1. Check the nozzle support ring for rotor seal damage or wear.
2. Inspect the nozzle support ring groove for galling or fretting.
3. Report inspection findings on inspection form PGS/GT-FF-6096.
Operation 6 — How to Inspect Inner Compressor Discharge Case Seals
1. Inspect the seals for damage, wear and overall integrity.
MI-I-2
Inspection and Maintenance — GEK 107048