Latest Articles

7FA Nozzle Repair: How Damage Impacts Flow Path, Heat Rate, and Reliability 7FA nozzle repair is not a routine maintenance line item. Stage 1 nozzles suffer oxidation, TBC spallation, trailing edge cracking, and cooling hole blockage during normal operation. Each damage mode degrades flow path efficiency, raises wheelspace temperatures, and increases heat rate by measurable...

7FA Bucket Damage: When Repair Isn’t Enough and Downtime Becomes a Crisis

A planned hot gas path inspection on a GE Frame 7FA can turn into something far more expensive the moment bucket condition becomes an open question. If you’ve pulled borescope images showing oxidation, tip wear, or TBC spallation on your 7FA buckets, the repair-versus-replace decision needs to be made before your outage window opens —...

Advanced Coatings for GE 7FA Blades: The Complete Technical Guide

The coating systems protecting 7FA blades from destruction are more engineered than most plant engineers encounter in a single career — and when they fail, the consequences land fast. The multilayer system these machines depend on consists of an MCrAlY bond coat applied via HVOF or atmospheric plasma spray, a yttria-stabilized zirconia thermal barrier coating...

Pre-Outage Planning for DLN 2.6+ Combustion Systems: What to Do Before the Crew Arrives

A DLN 2.6+ combustion outage that goes sideways rarely fails during execution. It fails during the planning cycle that happened six to twelve months earlier — when parts didn’t get ordered, dynamics data sat unreviewed, and the post-outage tuning plan was left as a conversation for another day. By the time the crew arrives, the...

When to Repair vs. Replace Major 7FA.04 Components: A Practical Guide for Plant Engineers

Every major outage on a GE 7FA.04 puts the same question on the table: repair it or replace it. It sounds straightforward until you’re standing in front of a set of first-stage buckets with an outage window closing, a six-figure replacement quote in hand, and a repair provider telling you they can return the components...

Can 7FA Repairs Be Done in the Field?

When a 7FA gas turbine experiences an unplanned outage, time is of the essence. Operators seek swift, dependable solutions to restore their units. Fortunately, many 7FA field repairs can be executed directly at the plant site. This approach minimizes downtime and reduces expenses associated with transporting heavy components elsewhere. We are based in Houston, Texas,...