GE MS6001B, Maintenance Instructions Manual

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Combustion Inspection — Inspection Procedures Inspection and Maintenance — GEK 107048
CI-I-13
CAUTION
Do not contaminate thermal barrier coating with pene-
trant.
5. Figure CI-I.9 shows a typical slot cooled combustion hole and portion of two bands of cooling
holes. Areas that should be looked at closely are identified as follows:
a. It is important to verify that there are no cracks emanating from the combustion holes (A) and
no cracks between the cooling holes, or from the cooling holes toward the combustion holes
(B).
b. The cooling ring overhang should be inspected to detect cracks or warpage. Particularly inspect
the overhang in the cooling panel behind the crossfire tube ports and combustion holes.
c. Check the liner stops for wear, cracks or deformation due to improper handling.
d. Liner stop welds should be inspected for cracks.
6. Inspect the liner spring seals for axial cracks, circumferential cracks, distortion (flattening), wear,
missing leaves, bent leaves or spotweld cracks. See Table CI-2 for inspection criteria.
7. If any spring seals are reshaped, ensure the leaf curvature height is similar to adjacent leaves and
“PI” tape dimension (11.21
±
0.02 in.).
8. Liquid penetrant check any spring seal leaves that have been reshaped.
9. Inspect liner rivets for weld cracks and missing rivet ends.
10. Inspect the combustion liner fuel nozzle collars for wear.
11. Inspect crossfire tube collar for cracks, wear and distortion.
12. Inspect the cap assembly, support frame, impingement cooling plate and plates around primary
cups for weld cracks.
13. Inspect the cap assembly to determine if it is loose in liner.