How to Know If Your Generator Needs a Rewind vs Replacement
A tripped generator or a failed insulation test doesn’t leave much room to think, but the decision that follows deserves more than a guess. The choice isn’t a coin flip based on which repair shop happens to answer the phone first, and it shouldn’t be treated like one. Working through generator rewind vs replacement decisions...
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Common GE 7FA Gas Turbine Failure Modes and What Causes Them
A trip without warning. A borescope image that shows something nobody expected. The question that follows is always the same: how serious is this? The most common 7FA failure modes cluster into four zones: the hot gas path, the combustion system, the compressor, and the rotor and bearing assembly. Knowing which one you’re looking at...
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7FA Bucket Cracking Explained
The finding is on the report, the borescope images are attached, and the question isn’t academic: can the unit keep running until the next planned outage, or does this need attention now? 7FA bucket cracking most often traces back to thermal mechanical fatigue, high cycle fatigue, creep rupture, oxidation, or DLN combustion dynamics acting on...
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GE 7FA.04 vs Earlier 7FA Models: What Changed and Why It Matters (Complete Guide)
If you operate a GE Frame 7FA gas turbine fleet and need to know whether your maintenance plan, spare parts inventory, or upgrade pathway matches your unit’s actual build standard, the sub-variant designation is where that answer starts. The 7FA.04 introduced upgraded compressor aerofoils, revised hot gas path components with enhanced Thermal Barrier Coatings (TBC), an improved DLN...
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GE 7FA Transition Piece Repair
You just walked off an inspection, and the news wasn’t good. Cracking along a weld seam. Some distortion in the aft frame. Maybe coating loss you weren’t expecting to see this early in the cycle. Finding damage on a 7FA transition piece isn’t a crisis, it’s a decision point, and the right call depends on...
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GE 7FA Combustion Liner Repair
The borescope report is open on your screen, and one image keeps pulling your eye back: coating loss, maybe a hairline crack near the cap, something that wasn’t there at the last inspection. What you need right now isn’t a tutorial. You need a clear answer: is this GE 7FA combustion liner still repairable, or...
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