GE MS6001B, Maintenance Instructions Manual

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Combustion Inspection — Inspection Procedures Inspection and Maintenance — GEK 107048
CI-I-23
Note: Repair welding procedures will not be described except to note that
GTAW (Gas Tungsten Arc Welding) is the only weld repair procedure
allowed on MS-6001B transition pieces. It is generally recommended
that transition pieces requiring repairs be sent to a qualified General
Electric Company Gas Turbine repair facility.
Operation 9 — How to Inspect Combustion Flow Sleeves
1. Using a bright light and ten (10) power magnifying glass, inspect the combustion casing flow
sleeves.
2. Use Figures CI-I.12 and CI-I.13 for identification of parts and Table CI-5 for inspection limits.
Record all findings on Inspection Form PGS/GT-FF-6409.
a. Inspect the sleeve for body or weld cracks, out-of-roundness, burn-through, missing metal and
wear.
b. Inspect flange to body weld for cracks or cracks in the flange.
Operation 10 — How to Inspect Combustion Casings
1. Inspect inside and outside of combustion casings for cracks, bulging, buckling signs of overheat-
ing and corrosion.
2. Inspect casings 3, 4, 5, 6 and 7 false start drain holes for plugging or blockage.
3. Inspect liner stops for wear. If there is more than 0.03 inch wear on the liner stop contact surfaces,
the liner stop must be replaced or repaired.
4. Inspect all thread inserts in the crossfire, spark plug, and flame detector flanges. Replace inserts
if necessary.
5. Report condition and findings on Inspection Form PGS/GT-FF-6403.
Operation 11 — How to Inspect the First Stage Nozzle
1. Use a borescope through the inspection ports, if applicable. Inspect the first stage nozzle for corro-
sion, erosion cracks, deposits and foreign object damage. See Section 4, Scheduled Turbine Main-
tenance, “Special Inspections,” of this Service Manual.
2. If borescope inspection cannot be performed make a visual inspection of the first stage nozzle.
3. Report condition and findings on inspection report forms PGS/GT-FF-6095 and 6096.
Operation 12 — How to Inspect and Test the Spark Plugs
1. Inspect the spark plug assembly for wear between the tip and the hole in the liner or overheating
damage to the tip.