Letter: H

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Hot section repair (HSR)

The maintenance, inspection, and refurbishment of high-temperature components, such as the combustor, blades, vanes, and exhaust, in aeroderivative engines. Specialized repair techniques like welding, coatings, and machining address wear, cracks, and corrosion.

Hot section exchange (HSE)

A maintenance procedure in which worn or damaged high-temperature components are switched with reconditioned ones to restore an aeroderivative engine to service with minimal downtime and reduced costs.

High-pressure turbine (HPT)

One of four major rotating sections in an aeroderivative engine, the HPT handles the hottest, highest pressure gas after the combustor, driving the high-pressure compressor (HPC). The other three sections include the low-pressure compressor (LPC), low-pressure turbine (LPT), and HPC.

High-pressure compressor (HPC)

One of four major rotating sections in an aeroderivative engine, the HPC handles the significant pressure increase for the high-pressure turbine (HPT) on the inner shaft. The other three sections include the low-pressure compressor (LPC), low-pressure turbine (LPT), and HPT.

Human-machine interface (HMI)

Hardware or software that enables people to interact with, monitor, and control systems or devices.

High-pressure section (HP)

The portion of the gas turbine centered around the high-pressure turbine (HPT) and connected to the high-pressure compressor (HPC), which handles the highest temperatures and pressures after combustion.